Radar · Energy Efficiency Tech in United States
Best Energy Efficiency Tech Companies in United States
The 2011 best Energy Efficiency Tech companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: View.
By Rohit KhannaTrends & Stories
2011companies tracked
$21.5Bdisclosed funding
7unicorns
654have raised
Energy Efficiency Tech companies in the United States have never been easier to map, and that's exactly what this directory does: rank 2,011 tracked companies by disclosed equity funding and recent funding momentum, with $21.5B in total capital on the table and seven unicorns already in the mix.
The funding spread tells you something. Span leads at $231M, with Sense close behind at $195M and Frore Systems at $190M. But here's the thing: the revenue picture is messier. Across 12 filers, median revenue growth is running at -12% YoY, even as the combined pool clears $44.2B. Johnson Controls International is the outlier that earns a second look, booking $524M in net income, 42x the sector median. I'd call that a structural advantage, not a fluke. Meanwhile, app-layer momentum tells a different story: median install growth across 138 energy apps is up 28% YoY, a signal that consumer-facing demand is real and accelerating. Hot themes this quarter are solar electricity generation, renewable electricity, and solar PV. The funding is concentrated, the revenue growth is choppy, but the underlying demand? That part's moving.
Sources & further reading
- No new wind for Consumers Energy
- Solar energy news roundup: Solar cells go ‘green,’ ultrathin, and power 24/7
- Wind and solar drive u s renewable energy growth in
FLIAR INTELLIGENCE · ENERGY EFFICIENCY TECH × UNITED STATES
Our analysis of 50 Energy Efficiency Tech companies
$7.8b in tracked funding; 86% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
50companies analysed
86%cloud-native stacks
2025funding peak (by rounds)
4unicorns
2014median founding year
521kcombined LinkedIn audience
35%of audience held by top 3
9companies hiring publicly (12 mo)
Ranked: Best Energy Efficiency Tech companies in United States
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | View Provider of AI and app-based smart windows glasses for buildings 82Innovation top 21%Patents top 21%Funding top 22%Product top 22% All 13 signals ▾Innovationtop 21% Patentstop 21% Fundingtop 22% Producttop 22% Talenttop 28% Moattop 29% Markettop 32% Growthtop 39% Techtop 45% AItop 45% Fin. healthtop 46% Globaltop 47% Customersbottom 35% Innovation: 2,366 patents (top 1% of patent-holders) · 928 filings since 2022 vs 1074 in 2017-21 Patents: 2,366 patents matched (strict assignee match) · 928 filings since 2022 vs 1074 in 2017-21 rank vs industry peers · Fliar Intelligence Index 82/100 | $3.5B | 43 mo ago | 870 | Andrew Min Co-CEO | DrupalPHPSalesforce+25 | — | 2,366 patents Electrochromic smart glass control, optical switching, and thin‑film device manufacturing | — |
| 2 | Redaptive 🦄 Provider of fully-funded energy efficiency and sustainability solutions. 60Funding top 16%Moat top 26%Product top 30%Market top 37% All 9 signals ▾Fundingtop 16% Moattop 26% Producttop 30% Markettop 37% Talenttop 38% Globaltop 48% Techtop 49% Growthbottom 40% Newsbottom 21% Funding: Raised $726M across 11 rounds · 11 rounds over 11 yrs (1.0/yr) Moat: Editorial + unicorn rating 9/10 · Unicorn rank vs industry peers · Fliar Intelligence Index 60/100 | $726M | 13 mo ago | 326 | Arvin Vohra Co-Founder & CEO | WordPressMySQLPHP+27 | — | — | — |
| 3 | Arcadia 🦄 Provider of clean energy data platform and solutions for businesses. 69Tech top 12%News top 14%Funding top 19%Growth top 23% All 11 signals ▾Techtop 12% Newstop 14% Fundingtop 19% Growthtop 23% Moattop 28% Producttop 34% Talenttop 37% Innovationbottom 49% Patentsbottom 48% Globalbottom 48% Marketbottom 38% Tech: 58 technologies across 7/8 capability areas · Cloud: Amazon Alb, Amazon Cloudfront News: 7 BI events in 12 mo (of 187 tracked, 14 types) · +250% YoY rank vs industry peers · Fliar Intelligence Index 69/100 | $554M | 26 mo ago | 2 | Kate Henningsen Co-Founder And Chief Operations Officer | SentryAtlassian StatuspageZendesk+23 | 7 signals ▲250% M&A · Leadership | 11 patents Medical imaging foot devices and electronic health record management software | — |
| 4 | GridPoint Provider of data-driven energy management solutions 57Funding top 18%Patents top 31%Innovation top 32%Moat top 35% All 12 signals ▾Fundingtop 18% Patentstop 31% Innovationtop 32% Moattop 35% Producttop 37% Talenttop 38% Techtop 45% Markettop 47% Globalbottom 42% Growthbottom 41% Newsbottom 24% Customersbottom 22% Funding: Raised $539M across 15 rounds · 15 rounds over 21 yrs (0.7/yr) Patents: 169 patents matched (strict assignee match) · 16 filings since 2022 vs 35 in 2017-21 rank vs industry peers · Fliar Intelligence Index 57/100 | $539M | 14 mo ago | 192 192 → 190 (-1%) · sector median +1% | Peter Corsell Founder | WordPressBugHerdApple iCloud Mail+35 | — | 169 patents Smart energy management and demand‑response control for HVAC, lighting, and submetered devices | — |
| 5 | Tendril Online building energy management solution for homeowners 57Funding top 19%Growth top 32%Moat top 37%Patents top 40% All 10 signals ▾Fundingtop 19% Growthtop 32% Moattop 37% Patentstop 40% Innovationtop 45% Techtop 48% Talentbottom 49% Marketbottom 43% Globalbottom 39% Newsbottom 27% Funding: Raised $337M across 21 rounds · 21 rounds over 22 yrs (1.0/yr) Growth: Headcount 60 → 86 (+43%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 57/100 | $337M | 15 mo ago | 86 | Chris Bahry Co-Founder | Creative Director | Google CloudReactAtlassian Statuspage+20 | — | 18 patents Advanced smart‑grid energy management and personalized demand‑response optimization | — |
| 6 | SPAN Smart energy management technology platform that modernizes residential electrical systems 82Funding top 13%Innovation top 18%Patents top 20%Growth top 28% All 11 signals ▾Fundingtop 13% Innovationtop 18% Patentstop 20% Growthtop 28% Moattop 28% Producttop 35% Talenttop 38% Techtop 42% Customerstop 42% Markettop 43% Globalbottom 42% Funding: Raised $231M across 10 rounds · 10 rounds over 8 yrs (1.2/yr) Innovation: 78 patents (top 21% of patent-holders) · 64 filings since 2022 vs 14 in 2017-21 rank vs industry peers · Fliar Intelligence Index 82/100 | $231M | 5 mo ago | 220 | Jireh Seow Co-Founder | WebflowApple iCloud MailGoogle Workspace+22 | — | 78 patents Smart electrical panel and load management systems for residential/commercial energy control | 1 job opening |
| 7 | Sense Smart energy platform providing real-time electricity usage insights for homes and utilities 60Patents top 21%Funding top 23%Customers top 26%Moat top 26% All 12 signals ▾Patentstop 21% Fundingtop 23% Customerstop 26% Moattop 26% Innovationtop 27% Producttop 33% Talenttop 33% Techtop 36% Growthtop 37% Globaltop 50% Marketbottom 40% Fin. healthbottom 17% Patents: 114 patents matched (strict assignee match) · 60 filings since 2022 vs 44 in 2017-21 Funding: Raised $195M across 5 rounds · 5 rounds over 11 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 60/100 | $195M | 4 mo ago | 120 120 → 106 (-12%) · sector median +1% | Mike Phillips Co-founder | WordPress Block EditorWordPressPlesk+36 | — | 114 patents Smart power metering and event analytics for device identification in intelligent grids | 1 award |
| 8 | Frore Systems Developer of thermal management solutions for data centers and electronic devices 72Innovation top 16%Patents top 17%Funding top 18%Moat top 33% All 10 signals ▾Innovationtop 16% Patentstop 17% Fundingtop 18% Moattop 33% Newstop 34% Growthtop 35% Talenttop 38% Marketbottom 48% Techbottom 42% Globalbottom 40% Innovation: 194 patents (top 16% of patent-holders) · 163 filings since 2022 vs 31 in 2017-21 Patents: 194 patents matched (strict assignee match) · 163 filings since 2022 vs 31 in 2017-21 rank vs industry peers · Fliar Intelligence Index 72/100 | $190M | 3 mo ago | 75 | Suryaprakash Ganti Co-Founder & CTO | WebflowVimeocore-js+12 | 4 signals Funding | 194 patents MEMS-enabled active cooling and fluidic actuation for LED and waterproof electronic systems | — |
| 9 | Everactive Developer of self-powered chips for wireless ambient Internet of Things devices 64Funding top 21%Moat top 21%Patents top 26%Innovation top 27% All 9 signals ▾Fundingtop 21% Moattop 21% Patentstop 26% Innovationtop 27% Growthtop 31% Techtop 45% Talentbottom 49% Marketbottom 43% Globalbottom 39% Funding: Raised $160M across 11 rounds · 11 rounds over 14 yrs (0.8/yr) Moat: Editorial + unicorn rating 8/10 · IP moat: 51 patents rank vs industry peers · Fliar Intelligence Index 64/100 | $160M | 21 mo ago | 91 | David Wentzloff Co-founder and Co-CTO | WordPressApple iCloud MailGoogle Workspace+22 | — | 51 patents Patents concentrated in mechanical & energy engineering | — |
| 10 | Lancium Developer of infrastructure for artificial intelligence data centers and power orchestration 72Funding top 19%Patents top 24%Moat top 26%Innovation top 28% All 11 signals ▾Fundingtop 19% Patentstop 24% Moattop 26% Innovationtop 28% Talenttop 38% Techtop 39% Growthtop 45% AItop 45% Marketbottom 47% Globalbottom 40% Newsbottom 27% Funding: Raised $150M across 3 rounds · 3 rounds over 8 yrs (0.4/yr) Patents: 173 patents matched (strict assignee match) · 88 filings since 2022 vs 85 in 2017-21 rank vs industry peers · Fliar Intelligence Index 72/100 | $150M | 8 mo ago | 80 80 → 69 (-14%) · sector median +1% | Prashant Gupta Co-Founder | WordPressApple iCloud MailGoogle Workspace+27 | — | 173 patents Real-time behind‑meter power routing and load management for EV charging and flexible datacenters | — |
| 11 | Particle Developer of a prototype to production connectivity platform for IoT 55Tech top 23%Funding top 24%Customers top 24%News top 30% All 12 signals ▾Techtop 23% Fundingtop 24% Customerstop 24% Newstop 30% Moattop 35% Growthtop 40% Producttop 47% Talentbottom 49% Marketbottom 47% Patentsbottom 39% Globalbottom 39% Innovationbottom 35% Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $130M | 15 mo ago | 109 109 → 110 (+1%) · sector median +1% | Zach Supalla Co-Founder & CEO | Cart FunctionalityShopifyApple iCloud Mail+31 | 4 signals M&A · Funding | 5 patents Pharma skin‑inflammation formulations, audio speaker hardware, VR headset devices, graphic‑design software. | 1 launch |
| 12 | Molekule Manufacturer of air purification and humidification devices with filtration technology 50Funding top 28%Innovation top 29%Patents top 29%Product top 34% All 13 signals ▾Fundingtop 28% Innovationtop 29% Patentstop 29% Producttop 34% Moattop 38% Techtop 41% Growthtop 45% Customerstop 50% Talentbottom 49% Marketbottom 44% Globalbottom 40% Newsbottom 36% Fin. healthbottom 29% Funding: Raised $97.9M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) Innovation: 77 patents (top 23% of patent-holders) · 39 filings since 2022 vs 38 in 2017-21 rank vs industry peers · Fliar Intelligence Index 50/100 | $98M | 13 mo ago | 92 92 → 81 (-12%) · sector median +1% | Jason Dibona CEO | ShopifyApple iCloud MailMicrosoft 365+16 | — | 77 patents Indoor air purification using photocatalytic and UV-based filtration technologies | — |
| 13 | Budderfly Provider of energy management solutions and services for buildings 76Innovation top 19%Patents top 19%Funding top 22%Growth top 27% All 11 signals ▾Innovationtop 19% Patentstop 19% Fundingtop 22% Growthtop 27% Newstop 30% Moattop 32% Producttop 33% Techtop 41% Talenttop 41% Marketbottom 49% Globalbottom 36% Innovation: 68 patents (top 23% of patent-holders) · 43 filings since 2022 vs 9 in 2017-21 Patents: 68 patents matched (strict assignee match) · 43 filings since 2022 vs 9 in 2017-21 rank vs industry peers · Fliar Intelligence Index 76/100 | $85M | 2 mo ago | 103 | Al Subbloie Founder & CEO | HubSpot CMS HubApple iCloud MailZoho+29 | 5 signals ▲150% Capital raise · Earnings | 68 patents Patents concentrated in computing, sensing & instrumentation | 2 partnerships |
| 14 | Metronome Usage-based invoice management solutions for small businesses 60Funding top 24%Talent top 28%Moat top 31%Growth top 35% All 8 signals ▾Fundingtop 24% Talenttop 28% Moattop 31% Growthtop 35% Techtop 39% Marketbottom 41% Globalbottom 32% Newsbottom 20% Funding: Raised $78.0M across 4 rounds · 4 rounds over 4 yrs (1.0/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 60/100 | $78M | 15 mo ago | 50 | Ledion Bitincka Co-Founder and CTO | WebflowSentryApple iCloud Mail+30 | — | — | 1 partnership |
| 15 | CleanFiber Provider of cellulose insulation solutions for facilities 53Funding top 19%Moat top 21%Innovation top 23%Patents top 23% All 9 signals ▾Fundingtop 19% Moattop 21% Innovationtop 23% Patentstop 23% Talenttop 41% Globalbottom 43% Marketbottom 37% Techbottom 31% Newsbottom 22% Funding: Raised $71.1M across 23 rounds · 23 rounds over 10 yrs (2.3/yr) Moat: Editorial + unicorn rating 8/10 · IP moat: 44 patents rank vs industry peers · Fliar Intelligence Index 53/100 | $71M | 8 mo ago | 44 | Jonathan Strimling Chairman & CEO | Squarespace CommerceSquarespaceStimulus+11 | — | 44 patents Fire‑retardant cellulose insulation and field‑installable skinned assembly technologies | — |
| 16 | Ubicquia Provider of smart grid and streetlight monitoring and management solutions 78Innovation top 14%Patents top 14%AI top 15%News top 25% All 13 signals ▾Innovationtop 14% Patentstop 14% AItop 15% Newstop 25% Fundingtop 26% Producttop 26% Moattop 26% Techtop 37% Growthtop 43% Talenttop 43% Partnerstop 45% Marketbottom 42% Globalbottom 42% Innovation: 369 patents (top 6% of patent-holders) · 267 filings since 2022 vs 102 in 2017-21 Patents: 369 patents matched (strict assignee match) · 267 filings since 2022 vs 102 in 2017-21 rank vs industry peers · Fliar Intelligence Index 78/100 | $61M | 17 mo ago | 57 | Tre Zimmerman Co-Founder | DrupalApple iCloud MailMicrosoft 365+27 | 5 signals ▲400% Funding · Leadership | 369 patents Smart IoT lighting control and optical monitoring for power distribution infrastructure | — |
| 17 | Radiant Nuclear 🦄 Developer of portable nuclear microreactors designed to replace diesel generators 55Funding top 26%Growth top 28%Moat top 37%Market bottom 49% All 8 signals ▾Fundingtop 26% Growthtop 28% Moattop 37% Marketbottom 49% Talentbottom 49% Techbottom 41% Globalbottom 32% Partnersbottom 32% Funding: Raised $55.0M across 7 rounds · 7 rounds over 6 yrs (1.2/yr) Growth: Web rank 10,000,000 → 5,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 55/100 | $55M | 6 mo ago | 34 | Doug Bernauer Founder & CEO | GridsomeApple iCloud MailGSAP+9 | — | — | — |
| 18 | Helio Home Provider of all-electric heating and cooling system installation and related services 67Funding top 24%Growth top 28%Tech top 37%Talent top 38% All 7 signals ▾Fundingtop 24% Growthtop 28% Techtop 37% Talenttop 38% Producttop 47% Globalbottom 48% Marketbottom 46% Funding: Raised $50.0M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Growth: Web rank 5,000,000 → 1,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 67/100 | $50M | 4 mo ago | — | Aaron Grant Co-Founder | SentryApple iCloud MailNode.js+25 | — | — | 1 job opening |
| 19 | Pixelligent Manufacturer of high refractive index nanocrystal formulations for electronics applications 62Funding top 25%Innovation top 26%Patents top 26%Moat top 28% All 11 signals ▾Fundingtop 25% Innovationtop 26% Patentstop 26% Moattop 28% Producttop 30% Growthtop 32% Techtop 36% Talentbottom 49% Globalbottom 42% Marketbottom 31% Newsbottom 21% Funding: Raised $48.2M across 33 rounds · 33 rounds over 21 yrs (1.6/yr) Innovation: 71 patents (top 25% of patent-holders) · 3 product lines rank vs industry peers · Fliar Intelligence Index 62/100 | $48M | 13 mo ago | 29 29 → 45 (+55%) · sector median +1% | Craig Bandes President & CEO | WordPressMySQLMariaDB+36 | — | 71 patents Nanocrystal synthesis, high‑index silicone nanocomposites, and light‑extraction structures for optical displays | — |
| 20 | Quilt AI-based heat control systems for homes 55Funding top 24%Talent top 28%Growth top 35%Moat top 39% All 10 signals ▾Fundingtop 24% Talenttop 28% Growthtop 35% Moattop 39% Techtop 45% AItop 45% Producttop 46% Globalbottom 39% Marketbottom 33% Customersbottom 2% Funding: Raised $42.0M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 55/100 | $42M | 6 mo ago | 30 | Matthew Knoll Co-Founder & CTO | Craft CMSPHPYii+20 | — | — | 2 launchs · 1 expansion · 1 award |
| 21 | Verdigris AI and SaaS-driven energy analytics platform for the management of facilities and commercial buildings 48Funding top 23%Growth top 28%Talent top 28%Moat top 41% All 11 signals ▾Fundingtop 23% Growthtop 28% Talenttop 28% Moattop 41% Techtop 42% Producttop 46% Newsbottom 41% Globalbottom 39% Marketbottom 32% Innovationbottom 31% Patentsbottom 24% Funding: Raised $41.7M across 13 rounds · 13 rounds over 15 yrs (0.9/yr) Growth: Headcount 20 → 27 (+35%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 48/100 | $42M | 3 mo ago | 27 | Mark Chung Co-Founder & CEO | WebflowUptimeRobotApple iCloud Mail+18 | — | 2 patents Electrical load identification and disaggregation via waveform analysis for power monitoring | — |
| 22 | SmartAC.com Provider of a platform for HVAC membership program management and growth 48Funding top 32%Partners top 32%Tech top 34%Growth top 35% All 11 signals ▾Fundingtop 32% Partnerstop 32% Techtop 34% Growthtop 35% Moattop 39% Producttop 40% Customerstop 49% Talentbottom 49% Newsbottom 39% Marketbottom 32% Globalbottom 29% Funding: Raised $38.6M across 6 rounds · 6 rounds over 6 yrs (1.0/yr) Partners: 2 partnership announcements in 12 mo (2 in 24 mo) rank vs industry peers · Fliar Intelligence Index 48/100 | $39M | 2 mo ago | 34 | Josh Teekell Founder & CEO | Cart FunctionalitySentryNode.js+23 | — | — | — |
| 23 | 75F Provider of IoT-based building energy management systems 53Tech top 26%Funding top 33%Moat top 36%Growth top 40% All 11 signals ▾Techtop 26% Fundingtop 33% Moattop 36% Growthtop 40% Producttop 40% Marketbottom 49% Talentbottom 49% Globalbottom 45% Fin. healthbottom 41% Customersbottom 30% Newsbottom 21% Tech: 40 technologies across 6/8 capability areas · Cloud: Cloudflare, Netlify Funding: Raised $36.3M across 10 rounds · 10 rounds over 12 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 53/100 | $36M | 16 mo ago | 175 | Deepinder Singh Co-Founder & CEO | DatoCMSSentryApple iCloud Mail+23 | — | — | 1 partnership · 1 expansion |
| 24 | Runwise Provider of IoT-based heating control systems for enterprises 50Funding top 28%Talent top 28%Tech top 35%Moat top 39% All 10 signals ▾Fundingtop 28% Talenttop 28% Techtop 35% Moattop 39% Growthtop 45% Producttop 46% Marketbottom 41% Globalbottom 37% Newsbottom 18% Customersbottom 2% Funding: Raised $35.2M across 5 rounds · 5 rounds over 6 yrs (0.8/yr) Talent: 4 named leaders on record · 4 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 50/100 | $35M | 12 mo ago | 48 | Michael Cook Co-Founder & Chief Growth Officer | TurbopackNode.jsSalesforce+28 | — | — | — |
| 25 | EnTouch Controls Energy management solutions 50Funding top 27%Product top 30%Growth top 32%Moat top 37% All 12 signals ▾Fundingtop 27% Producttop 30% Growthtop 32% Moattop 37% Talenttop 38% Techtop 42% Innovationbottom 43% Newsbottom 42% Patentsbottom 40% Customersbottom 40% Globalbottom 37% Marketbottom 35% Funding: Raised $30.9M across 9 rounds · 9 rounds over 15 yrs (0.6/yr) Product: 10 distinct product lines · 2 published apps (6.7k installs) rank vs industry peers · Fliar Intelligence Index 50/100 | $31M | 9 mo ago | 35 | James Walton VP and Co-Founder | WordPress Block EditorWordPressApple iCloud Mail+21 | — | 13 patents Patents concentrated in computing, sensing & instrumentation | 1 job opening · 1 award |
| 26 | OLEDWorks Manufacturer of organic light-emitting diode lighting solutions for various applications 82Patents top 14%AI top 15%Funding top 28%Talent top 28% All 12 signals ▾Patentstop 14% AItop 15% Fundingtop 28% Talenttop 28% Innovationtop 30% Growthtop 31% Techtop 31% Moattop 32% Producttop 46% Globaltop 49% Marketbottom 44% Newsbottom 21% Patents: 94 patents matched (strict assignee match) · 58 filings since 2022 vs 27 in 2017-21 AI: Holds AI/ML patents (G06N-family CPC) rank vs industry peers · Fliar Intelligence Index 82/100 | $31M | 11 mo ago | 73 73 → 147 (+101%) · sector median +1% | David DeJoy Co-Founder & Chairman | WordPressApple iCloud MailMicrosoft 365+27 | — | 94 patents Advanced segmented and stacked OLED microdisplays with ESD protection and low-voltage silicon backplanes | 1 launch |
| 27 | Cohesion Provider of a platform for smart building management and operations 48Growth top 20%Funding top 35%Tech top 37%Talent top 38% All 12 signals ▾Growthtop 20% Fundingtop 35% Techtop 37% Talenttop 38% Moattop 41% Producttop 47% Globalbottom 40% Innovationbottom 36% Marketbottom 35% Patentsbottom 34% Newsbottom 21% Customersbottom 9% Growth: Headcount 21 → 44 (+110%) across vintages · 1 acquisition/expansion move in 24 mo Funding: Raised $30.2M across 4 rounds · 4 rounds over 6 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 48/100 | $30M | 6 mo ago | 44 | Nick Lawrence Co-Founder | WebflowZohoZepto+25 | — | 3 patents Patents concentrated in computing, sensing & instrumentation | — |
| 28 | Amperon Provider of energy forecasting and analytics solutions for grid reliability 60Funding top 28%Moat top 39%Product top 40%Tech top 41% All 11 signals ▾Fundingtop 28% Moattop 39% Producttop 40% Techtop 41% Growthtop 42% Innovationtop 43% AItop 45% Talentbottom 49% Globalbottom 45% Marketbottom 43% Newsbottom 32% Funding: Raised $30.0M across 4 rounds · 4 rounds over 8 yrs (0.5/yr) Moat: Editorial + unicorn rating 7/10 · 10 curated direct competitors tracked rank vs industry peers · Fliar Intelligence Index 60/100 | $30M | 5 mo ago | 55 | Sean Kelly Co-Founder & CEO | WebflowWordPressApple iCloud Mail+29 | — | — | — |
| 29 | Uplight 🦄 AI and SaaS-driven solutions for energy monitoring in residential and commercial buildings 80News top 22%Tech top 24%Growth top 25%Moat top 31% All 10 signals ▾Newstop 22% Techtop 24% Growthtop 25% Moattop 31% Fundingtop 34% Patentstop 34% Innovationtop 36% Markettop 37% Talenttop 39% Globalbottom 44% News: 8 BI events in 12 mo (of 17 tracked, 5 types) · 2 high-value events (IPO/M&A/funding/contracts) in 12 mo Tech: 45 technologies across 6/8 capability areas · Cloud: Amazon Web Services, Cloudflare rank vs industry peers · Fliar Intelligence Index 80/100 | $30M | 15 mo ago | 496 | Luis D'Acosta CEO | WordPressAlgoliaMySQL+27 | 8 signals Leadership · M&A | 20 patents Residential energy demand response and HVAC optimization with real-time rebate mechanisms | 1 launch · 1 award |
| 30 | AtmosZero Manufacturer of industrial heat pumps for boilers 48Talent top 28%Funding top 31%Innovation top 34%Patents top 34% All 8 signals ▾Talenttop 28% Fundingtop 31% Innovationtop 34% Patentstop 34% Moattop 37% Globalbottom 40% Marketbottom 30% Newsbottom 21% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Funding: Raised $28.5M across 6 rounds · 6 rounds over 3 yrs (2.0/yr) rank vs industry peers · Fliar Intelligence Index 48/100 | $28M | 13 mo ago | 14 | Addison Stark Co-Founder & CEO | — | — | 16 patents Industrial heat generation and thermal storage using advanced heat pump systems | 2 job openings |
| 31 | HT Materials Science Developer of a heat transfer fluid additive for improved HVAC system efficiency. 37Talent top 28%Funding top 32%Growth top 35%Moat top 39% All 8 signals ▾Talenttop 28% Fundingtop 32% Growthtop 35% Moattop 39% Partnerstop 45% Globalbottom 38% Marketbottom 30% Techbottom 20% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Funding: Raised $24.4M across 4 rounds · 4 rounds over 6 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 37/100 | $24M | 5 mo ago | 26 | Rudy Holesek Co-Founder & Sr. VP of Business Development and Applications | WordPressMySQLPHP+13 | — | — | 1 launch · 1 award |
| 32 | Sunflower Labs Provider of AI-driven home security solutions using smart lighting and drones 62Funding top 31%Innovation top 35%Growth top 35%Patents top 36% All 11 signals ▾Fundingtop 31% Innovationtop 35% Growthtop 35% Patentstop 36% Moattop 37% Talenttop 38% Techtop 43% Newstop 44% AItop 45% Globalbottom 39% Marketbottom 34% Funding: Raised $22.1M across 5 rounds · 5 rounds over 10 yrs (0.5/yr) Innovation: 18 patents (top 54% of patent-holders) · 5 filings since 2022 vs 3 in 2017-21 rank vs industry peers · Fliar Intelligence Index 62/100 | $22M | 7 mo ago | 30 | Chris Eheim Founder + CTO | Node.jsNext.jsstyled-components+10 | — | 18 patents Autonomous multicopter drones for security surveillance, auto‑landing, and sensor‑network integration | — |
| 33 | Saphlux Developer of III-V Group-based semiconductor materials 40Talent top 15%Product top 25%Funding top 30%Moat top 32% All 9 signals ▾Talenttop 15% Producttop 25% Fundingtop 30% Moattop 32% Patentstop 38% Innovationtop 40% Techbottom 44% Globalbottom 40% Marketbottom 20% Talent: Analyst team rating 5/5 Product: 6 distinct product lines · Company stage: Series C rank vs industry peers · Fliar Intelligence Index 40/100 | $22M | 2 mo ago | 3 | — | Cart FunctionalitySquarespace CommerceSquarespace+13 | — | 32 patents Micro-LED manufacturing processes and quantum‑dot integrated semiconductor display technologies. | 1 partnership |
| 34 | HELIXintel Provider of SaaS-driven maintenance management software for commercial spaces 45Growth top 28%Funding top 33%Global bottom 48%Product bottom 47% All 7 signals ▾Growthtop 28% Fundingtop 33% Globalbottom 48% Productbottom 47% Techbottom 46% Marketbottom 32% Newsbottom 27% Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo Funding: Raised $21.4M across 5 rounds · 5 rounds over 6 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 45/100 | $21M | 2 mo ago | 28 | — | SalesforceGoogle Sign-inVue.js+13 | — | — | — |
| 35 | Nxlite Energy-control coatings for glass and polymer substrates 27Talent top 28%Funding top 34%Global bottom 48%Tech bottom 35% All 5 signals ▾Talenttop 28% Fundingtop 34% Globalbottom 48% Techbottom 35% Marketbottom 25% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Funding: Raised $19.8M across 4 rounds · 4 rounds over 9 yrs (0.4/yr) rank vs industry peers · Fliar Intelligence Index 27/100 | $20M | 8 mo ago | — | Nazir Kherani Co-Founder | Framer SitesReactPriority Hints+6 | — | — | — |
| 36 | UbiQD Developer of low-cost quantum dots for industrial applications 45Funding top 26%Patents top 29%Innovation top 32%Moat top 32% All 10 signals ▾Fundingtop 26% Patentstop 29% Innovationtop 32% Moattop 32% Newstop 39% Talentbottom 49% Techbottom 48% Globalbottom 40% Partnersbottom 35% Marketbottom 31% Funding: Raised $18.4M across 15 rounds · 15 rounds over 10 yrs (1.5/yr) Patents: 65 patents matched (strict assignee match) · 31 filings since 2022 vs 33 in 2017-21 rank vs industry peers · Fliar Intelligence Index 45/100 | $18M | 4 mo ago | 27 | Hunter McDaniel Founder & CEO | WebflowreCAPTCHAHSTS+10 | 3 signals ▲200% Funding · Contracts | 65 patents Patents concentrated in chemistry & materials | 1 launch · 3 expansions |
| 37 | Rebound Developer of industrial cooling technology with built-in energy storage 27Funding top 32%Moat top 37%Talent top 38%Product bottom 45% All 9 signals ▾Fundingtop 32% Moattop 37% Talenttop 38% Productbottom 45% Innovationbottom 43% Patentsbottom 39% Globalbottom 39% Marketbottom 27% Newsbottom 24% Funding: Raised $17.9M across 16 rounds · 16 rounds over 11 yrs (1.5/yr) Moat: Editorial + unicorn rating 7/10 · IP moat: 8 patents rank vs industry peers · Fliar Intelligence Index 27/100 | $18M | 2 mo ago | 7 | Russell Goldfarbmuren Co-Founder & CTO | — | — | 8 patents Thermal energy recovery and heat pump technologies with smart inventory control | 1 job opening · 2 launchs |
| 38 | Tynt Manufacturer of smart windows 40Talent top 28%Innovation top 32%Product top 36%Funding top 42% All 7 signals ▾Talenttop 28% Innovationtop 32% Producttop 36% Fundingtop 42% Techbottom 39% Globalbottom 37% Marketbottom 26% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Innovation: 12 product lines · Deep-tech classification: Tech Hardware rank vs industry peers · Fliar Intelligence Index 40/100 | $14M | 7 mo ago | 21 21 → 17 (-19%) · sector median +1% | Mike Mcgehee Co-Founder | ReactGatsbyNetlify+5 | — | — | — |
| 39 | Harvest Thermal Provider of thermal battery systems for heating, cooling, and hot water 53Innovation top 29%Patents top 29%Funding top 32%Moat top 32% All 9 signals ▾Innovationtop 29% Patentstop 29% Fundingtop 32% Moattop 32% Techtop 33% Growthtop 45% Talentbottom 49% Globalbottom 40% Marketbottom 27% Innovation: 25 patents (top 46% of patent-holders) · 22 filings since 2022 vs 3 in 2017-21 Patents: 25 patents matched (strict assignee match) · 22 filings since 2022 vs 3 in 2017-21 rank vs industry peers · Fliar Intelligence Index 53/100 | $13M | 8 mo ago | 12 12 → 17 (+42%) · sector median +1% | Jane Melia Co-Founder and CEO | SentryNode.jsReact+17 | — | 25 patents Low-emission HVAC control and thermal‑storage management systems for building energy efficiency | — |
| 40 | AeroShield Provider of insulated window panes 27Funding top 28%Talent top 28%Moat top 39%Tech bottom 44% All 6 signals ▾Fundingtop 28% Talenttop 28% Moattop 39% Techbottom 44% Globalbottom 29% Marketbottom 22% Funding: Raised $12.0M across 9 rounds · 9 rounds over 6 yrs (1.5/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 27/100 | $12M | 9 mo ago | 10 | Kyle Wilke Cofounder and CTO | SanityYouTubeAstro+10 | — | — | — |
| 41 | 639 Solar Data Centers + Cloud Provider of energy management solutions for data centers 42Funding top 36%Talent bottom 45%Global bottom 25% All 3 signals ▾Fundingtop 36% Talentbottom 45% Globalbottom 25% Funding: Raised $10.1M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) Talent: 1 named leader on record rank vs industry peers · Fliar Intelligence Index 42/100 | $10M | 6 mo ago | — | Tim Shaler Chief Executive Officer | — | — | — | — |
| 42 | Flair Systems Manufacturer of smart vents for home temperature control 50Tech top 26%Growth top 35%Funding top 37%Talent top 38% All 9 signals ▾Techtop 26% Growthtop 35% Fundingtop 37% Talenttop 38% Customerstop 39% Moattop 39% Producttop 46% Globalbottom 38% Marketbottom 25% Tech: 60 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $8M | 2 mo ago | 13 | Kenny Tay Co-Founder & CTO | ShopifyBootstrapAmazon Web Services+44 | — | — | — |
| 43 | DaisyChain Provider of an AI-enabled software platform for energy management and electrification 60Talent top 35%Funding top 40%Global bottom 25% All 3 signals ▾Talenttop 35% Fundingtop 40% Globalbottom 25% Talent: 4 named leaders on record Funding: Raised $6.0M across 2 rounds · 2 rounds over 1 yrs (2.0/yr) rank vs industry peers · Fliar Intelligence Index 60/100 | $6M | 1 mo ago | — | McGowan Southworth Co-Founder & President | — | — | — | — |
| 44 | Ekotrope Tech-enabled service provider for energy-efficient building, green politics, & construction 32Growth top 35%Product top 36%Talent bottom 49%Tech bottom 48% All 10 signals ▾Growthtop 35% Producttop 36% Talentbottom 49% Techbottom 48% Fundingbottom 47% Innovationbottom 43% Moatbottom 42% Patentsbottom 37% Globalbottom 32% Marketbottom 29% Growth: Fresh capital in last 24 mo Product: 7 distinct product lines · Company stage: Series A rank vs industry peers · Fliar Intelligence Index 32/100 | $6M | 8 mo ago | 17 17 → 36 (+112%) · sector median +1% | Nick Sisler Founder and Director of Engineering | JavaD3Google Web Toolkit+16 | — | 5 patents Energy management software for green building automation and demand‑side control | 1 job opening · 1 launch |
| 45 | Helix Earth Technologies Provider of energy efficient HVAC systems 29Funding top 37%Talent top 38%Moat top 48%Tech bottom 42% All 6 signals ▾Fundingtop 37% Talenttop 38% Moattop 48% Techbottom 42% Globalbottom 37% Marketbottom 32% Funding: Raised $5.9M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 29/100 | $6M | 2 mo ago | — | Brad Husick Co-Founder & CBO | Tailwind CSSGSAPVercel+7 | — | — | 7 job openings |
| 46 | Propexo Ofers a unified API for integration leading property management systems 55Talent top 35%Funding top 45%Global bottom 25% All 3 signals ▾Talenttop 35% Fundingtop 45% Globalbottom 25% Talent: 3 named leaders on record Funding: Raised $5.0M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $5M | 9 mo ago | — | Remen Okoruwa Co-Founder & CEO | — | — | — | 1 launch |
| 47 | Aquisense Provider of UV-C LED based disinfection system 60Product top 26%Growth top 28%Talent top 28%Patents top 36% All 10 signals ▾Producttop 26% Growthtop 28% Talenttop 28% Patentstop 36% Innovationtop 37% Techtop 37% Fundingtop 42% Moattop 45% Globalbottom 35% Marketbottom 33% Product: 7 distinct product lines · Company stage: Acquired Growth: Web rank 10,000,000 → 5,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 60/100 | $4M | 2 mo ago | 26 | — | WordPressMySQLPHP+33 | — | 12 patents UV-LED based water and liquid disinfection and purification systems | — |
| 48 | Karman Industries Provider of industrial heat solutions designed to reduce energy waste 16Funding top 41%Talent bottom 49%Moat bottom 44%Tech bottom 42% All 8 signals ▾Fundingtop 41% Talentbottom 49% Moatbottom 44% Techbottom 42% Patentsbottom 36% Globalbottom 33% Innovationbottom 31% Marketbottom 28% Funding: Raised $4.0M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 16/100 | $4M | 9 mo ago | — | Chiranjeev Kalra Co-Founder & CTO | WebflowVimeoGSAP+15 | — | 5 patents Patents concentrated in transport & manufacturing processes | 1 award |
| 49 | Prefix Provider of automated facilities management solutions for kitchens, offering automated tasks, reminders, and… 11Moat top 38%Funding top 41%Talent bottom 49%Patents bottom 41% All 7 signals ▾Moattop 38% Fundingtop 41% Talentbottom 49% Patentsbottom 41% Globalbottom 36% Innovationbottom 34% Marketbottom 18% Moat: Editorial + unicorn rating 4/10 · IP moat: 6 patents Funding: Raised $3.9M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 11/100 | $4M | 2 mo ago | 4 | Jared Schwartzentruber Founder | — | — | 6 patents Automated vehicle and watercraft wash stations with cleaning and docking technologies | — |
| 50 | Carson Visitor management solution 24Talent top 41%Moat top 48%Funding top 49%Tech bottom 45% All 9 signals ▾Talenttop 41% Moattop 48% Fundingtop 49% Techbottom 45% Newsbottom 45% Customersbottom 44% Productbottom 40% Globalbottom 37% Marketbottom 30% Talent: Analyst team rating 4/5 · 1 named leader on record Moat: Editorial + unicorn rating 5/10 · 10 curated direct competitors tracked rank vs industry peers · Fliar Intelligence Index 24/100 | $3M | 6 mo ago | 14 14 → 33 (+136%) · sector median +1% | Guy Blachman Founder & CEO | — | — | — | — |
Top 12 Energy Efficiency Tech companies in United States
#1
Series D · San Jose, California · founded 2018 · 75 employees$190Mraised▾
Series D · San Jose, California · founded 2018 · 75 employees
Developer of thermal management solutions for data centers and electronic devices. The company offers direct-to-chip liquid cooling and solid-state active air cooling products. These cooling solutions are applicable to consumer devices, industrial embedded systems, and data centers. The company's products aim to improve performance and enable compact designs.
Fliar Intelligence Index™ 72how this company ranks against its industry peers
Innovation
top 16%Patents
top 17%Funding
top 18%Moat
top 33%News
top 34%Growth
top 35%Innovation: 194 patents (top 16% of patent-holders) · 163 filings since 2022 vs 31 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 194 patents matched (strict assignee match) · 163 filings since 2022 vs 31 in 2017-21 · Latest publication 2026
Funding: Raised $190M across 3 rounds · 3 rounds over 8 yrs (0.4/yr) · Last round Series D (Mar 2026)
Audience (LinkedIn): 9k LinkedIn followers
Funding rounds
- Mar 2026Series D$143M
- May 2024Series C$90M
- Dec 2022Series B$100M
- 2018Series A—
Founders & team
Investors
Qualcomm Ventures, Mayfield, Clear Ventures, Addition, Fidelity Investments, Prosperity7 Ventures
Tech stack
CloudflareCloudflare Bot ManagementGoogle Font ApiGoogle Hosted LibrariesHstsHttp/3
#2
Series C · San Francisco, California · founded 2014 · 220 employees$231Mraised▾
Series C · San Francisco, California · founded 2014 · 220 employees
Smart energy management technology platform that modernizes residential electrical systems. Its solutions replace traditional electrical panels with smart systems that provide homeowners with real-time visibility into household energy usage, circuit-level monitoring, and remote control of appliances and connected devices. It is designed to support modern electrified homes by integrating technologies such as home batteries, electric vehicle chargers, solar systems, HVAC systems, and heat pumps into a centralized energy management ecosystem.
Fliar Intelligence Index™ 82how this company ranks against its industry peers
Funding
top 13%Innovation
top 18%Patents
top 20%Growth
top 28%Moat
top 28%Product
top 35%Funding: Raised $231M across 10 rounds · 10 rounds over 8 yrs (1.2/yr) · Last round Series C (Jan 2026)
Innovation: 78 patents (top 21% of patent-holders) · 64 filings since 2022 vs 14 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 78 patents matched (strict assignee match) · 64 filings since 2022 vs 14 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 35k LinkedIn followers — 6.8% of this cohort's audience
Hiring (LinkedIn): 1 hiring post in 12 mo (public)
Funding rounds
- Jan 2026Series C$163.3M
- Sep 2025Series B$25M
- Jun 2025Grant (prize money)$999.8K
- Apr 2025Grant (prize money)$999.8K
Founders & team
Investors
ArcTern Ventures, Capricorn, Incite, One Zero Capital, Wireframe Ventures, Ulu Ventures
Tech stack
AccessibeAhrefsApple Icloud MailAuraBootstrapCloudflare
#3
Series D · Cambridge, Massachusetts · founded 2013 · 120 employees$194.6Mraised▾
Series D · Cambridge, Massachusetts · founded 2013 · 120 employees
Smart energy platform providing real-time electricity usage insights for homes and utilities. It uses smart sensors and data analytics to deliver real-time electricity usage insights for homes, utilities, and energy partners. It helps users understand and reduce energy consumption, improve efficiency, and support grid reliability by providing high-resolution monitoring and behavioral energy insights aimed at lowering carbon emissions and accelerating the energy transition.
Fliar Intelligence Index™ 60how this company ranks against its industry peers
Patents
top 21%Funding
top 23%Customers
top 26%Moat
top 26%Innovation
top 27%Product
top 33%Patents: 114 patents matched (strict assignee match) · 60 filings since 2022 vs 44 in 2017-21 · Latest publication 2026
Funding: Raised $195M across 5 rounds · 5 rounds over 11 yrs (0.5/yr) · Last round Series D (Jan 2026)
Customers: Play-Store rating 4.16★ across 1,762 ratings (1 apps) · Review volume +34% in 6 mo · Marquee-customer mentions: top 13% of tracked companies
Audience (LinkedIn): 23k LinkedIn followers — 4.3% of this cohort's audience
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- Jan 2026Series D—
- Apr 2022Series C$127.6M
- Sep 2021Series B—
- Aug 2019Series B$29.9M
Founders & team
Investors
Blue Earth Capital, Telus, Schneider Electric, Energy Impact Partners, iRobot, Prelude Ventures
Tech stack
Amazon Web ServicesAmplitudeApache Http ServerApple Icloud MailAtlassian StatuspageBootstrap
#4
Acquired · Shelton, Connecticut · founded 2007 · 103 employees$84.8Mraised▾
Acquired · Shelton, Connecticut · founded 2007 · 103 employees
Provider of energy management solutions and services for buildings. It provides integrated light switches to monitor and control lighting loads, advanced power strips to monitor and control plug load at the workstation level, temperature sensors, and electrical panel-level monitoring devices to monitor load at each level and report back to central software. It caters to corporations, municipal governments, colleges, universities, and manufacturers.
Fliar Intelligence Index™ 76how this company ranks against its industry peers
Innovation
top 19%Patents
top 19%Funding
top 22%Growth
top 27%News
top 30%Moat
top 32%Innovation: 68 patents (top 23% of patent-holders) · 43 filings since 2022 vs 9 in 2017-21 · 8 product lines
Patents: 68 patents matched (strict assignee match) · 43 filings since 2022 vs 9 in 2017-21 · Latest publication 2026
Funding: Raised $84.8M across 6 rounds · 6 rounds over 9 yrs (0.7/yr) · Last round Conventional Debt (Mar 2026)
Audience (LinkedIn): 13k LinkedIn followers — 2.5% of this cohort's audience
Activity (LinkedIn): 2 partnerships (incl. Viridi) announced in 12 mo
Funding rounds
- Mar 2026Conventional Debt$550M
- Jun 2025Conventional Debt$100M
- Jan 2024Conventional Debt$400M
- Oct 2020Series B$7.8M
Founders & team
Investors
Balance Point Capital, Connecticut Innovations, Edison Partners, Vantage Infrastructure, Nuveen, Global Infrastructure Partners
Tech stack
Amazon S3Amazon SesAmazon Web ServicesAosApache Http ServerApple Icloud Mail
#5
Series B · Houston, Texas · founded 2003 · 34 employees$38.6Mraised▾
Series B · Houston, Texas · founded 2003 · 34 employees
Provider of a platform for HVAC membership program management and growth. The platform offers tools for contractors to increase membership signups and improve customer retention. It connects HVAC systems with smart sensors and cloud monitoring to prevent breakdowns. The platform helps contractors reduce operational costs and build sustainable revenue streams. It also provides homeowners with scheduling, credits, reminders, and video chat.
Fliar Intelligence Index™ 48how this company ranks against its industry peers
Funding
top 32%Partners
top 32%Tech
top 34%Growth
top 35%Moat
top 39%Product
top 40%Funding: Raised $38.6M across 6 rounds · 6 rounds over 6 yrs (1.0/yr) · Last round Series B (Mar 2026)
Partners: 2 partnership announcements in 12 mo (2 in 24 mo)
Tech: 37 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services · Observability: Sentry
Audience (LinkedIn): 7k LinkedIn followers
Funding rounds
- Mar 2026Series B$4M
- Sep 2025Series B$3.8M
- Apr 2025Series B$3M
- Dec 2024Series B—
Founders & team
Investors
Mercury Fund, Vesta Ventures
Tech stack
Amazon Web ServicesAnimate.CssCart FunctionalityCloudflareCloudflare Bot ManagementCore-Js
#6
Series B · Mountain View, California · founded 2011 · 27 employees$41.7Mraised▾
Series B · Mountain View, California · founded 2011 · 27 employees
AI and SaaS-driven energy analytics platform for the management of facilities and commercial buildings. The cloud-based solution allows users to optimize operations, facility uptime, and manage energy costs. Its wireless sensors enable real-time identification, disaggregation, and analysis of the loads in buildings, providing insights into behavior and usage. It also provides an IoT Energy Meter that helps to track energy consumption with its smart sensors.
Fliar Intelligence Index™ 48how this company ranks against its industry peers
Funding
top 23%Growth
top 28%Talent
top 28%Moat
top 41%Tech
top 42%Product
top 46%Funding: Raised $41.7M across 13 rounds · 13 rounds over 15 yrs (0.9/yr) · Last round Series B (Mar 2026)
Growth: Headcount 20 → 27 (+35%) across vintages · Fresh capital in last 24 mo
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Audience (LinkedIn): 4k LinkedIn followers
Funding rounds
- Mar 2026Series B—
- Aug 2023Series B$10M
- Dec 2021Series B$1.1M
- Jan 2021Series B$7.1M
Founders & team
Investors
DCVC, Solea Energy, Jabil, Verizon, StartX, FOUNDER.org
Tech stack
ContentfulLinkedin Sign-InGoogle MapsUbuntuBootstrapVimeo
#7
Series E · San Francisco, California · founded 2015 · 326 employees$726.5Mraised▾
Series E · San Francisco, California · founded 2015 · 326 employees
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Fliar Intelligence Index™ 60how this company ranks against its industry peers
Funding
top 16%Moat
top 26%Product
top 30%Market
top 37%Talent
top 38%Global
top 48%Funding: Raised $726M across 11 rounds · 11 rounds over 11 yrs (1.0/yr) · Last round Conventional Debt (May 2025)
Moat: Editorial + unicorn rating 9/10 · Unicorn · 10 curated direct competitors tracked
Product: 2 published apps (1.2k installs) · Company stage: Series E
Audience (LinkedIn): 70k LinkedIn followers — 13.5% of this cohort's audience
Funding rounds
- May 2025Conventional Debt$650M
- Oct 2024Series E$100M
- Aug 2023Conventional Debt$125M
- Mar 2023Series E$250M
Founders & team
Investors
AB CarVal, CBRE, ENGIE New Ventures, Evergy Ventures, Linse Capital, CPP Investments
Tech stack
Amazon Web ServicesCdnjsCloudflareCloudflare Bot ManagementContentsquareCore-Js
#8
Series A · Commerce City, Colorado · founded 2012 · 7 employees$17.9Mraised▾
Series A · Commerce City, Colorado · founded 2012 · 7 employees
Developer of industrial cooling technology with built-in energy storage. The technology leverages ice as a thermal battery for agile and cost-effective solutions. It reduces peak energy demand, cuts operational costs, and achieves carbon emissions reductions. The technology is applicable to industrial cold storage, datacenter cooling, and food processing.
Fliar Intelligence Index™ 27how this company ranks against its industry peers
Funding
top 32%Moat
top 37%Talent
top 38%Product
bottom 45%Innovation
bottom 43%Patents
bottom 39%Funding: Raised $17.9M across 16 rounds · 16 rounds over 11 yrs (1.5/yr) · Last round Series A (Apr 2026)
Moat: Editorial + unicorn rating 7/10 · IP moat: 8 patents · 9 curated direct competitors tracked
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Audience (LinkedIn): 2k LinkedIn followers
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Customer Success Engineer
Activity (LinkedIn): 2 product launches announced in 12 mo
Funding rounds
- Apr 2026Series A$2M
- Feb 2026Series A$10.8M
- Jul 2025Series A$750K
- Sep 2024Series A$1.4M
Founders & team
Investors
Autodesk, Skyview Ventures, Clean Energy Ventures, Prime Coalition, SVC, Closed Loop Partners
#9
Series C · New Haven, Connecticut · founded 2014 · 3 employees$22Mraised▾
Series C · New Haven, Connecticut · founded 2014 · 3 employees
Developer of III-V Group-based semiconductor materials. It provides users with III-V Group-based semiconductor materials for fabricating semiconductor wafers or integrated circuits with a new base material which finds applications in improving LED technology and LED performance. It also provides a chip out which could reduce the cost of manufacturing LED-based lighting by 10 times.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
Talent
top 15%Product
top 25%Funding
top 30%Moat
top 32%Patents
top 38%Innovation
top 40%Talent: Analyst team rating 5/5
Product: 6 distinct product lines · Company stage: Series C
Funding: Raised $22.0M across 5 rounds · 5 rounds over 11 yrs (0.5/yr) · Last round Series C (Apr 2026)
Audience (LinkedIn): 556 LinkedIn followers
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Business Development Specialist/Manager
Activity (LinkedIn): 2 partnerships (incl. Vuzix Corporation) announced in 12 mo
Funding rounds
- Apr 2026Series C$43.5M
- Dec 2022Series B$15.8M
- Mar 2017Series A$5M
- Jul 2015Seed$200K
Investors
Leyard Optoelectronic, Zhen Fund, Elm Street Ventures, NXT Ventures, YEI Innovation Fund, Yale University
Tech stack
AngularCart FunctionalityCore-JsGodaddyHstsModernizr
#10
Series A · United States · founded 2019 · 28 employees$21.4Mraised▾
Series A · United States · founded 2019 · 28 employees
Provider of SaaS-driven maintenance management software for commercial spaces. It provides users with a platform that facilitates equipment condition tracking, manages the equipment database, assigns tasks to teammates, and requests services and parts from the manufacturer.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Growth
top 28%Funding
top 33%Global
bottom 48%Product
bottom 47%Tech
bottom 46%Market
bottom 32%Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo
Funding: Raised $21.4M across 5 rounds · 5 rounds over 6 yrs (0.8/yr) · Last round Conventional Debt (Mar 2026)
Global: Investors from 1 country beyond United States
Audience (LinkedIn): 3k LinkedIn followers
Funding rounds
- Mar 2026Series A$3M
- Mar 2026Conventional Debt—
- Jun 2023Series A$16.9M
- Mar 2022Seed$4M
Investors
Munich Re, Green Egg Ventures, Motivate Venture Capital, LAB Ventures, Stellifi, Launch NY
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesAppcuesDatadogFont Awesome
#11
Series D · The Woodlands, Texas · founded 2014 · 80 employees$150Mraised▾
Series D · The Woodlands, Texas · founded 2014 · 80 employees
Developer of infrastructure for artificial intelligence data centers and power orchestration. The company designs sites and builds electrical infrastructure to deliver reliable power access. It integrates renewable energy sources directly into data center campuses. The company orchestrates power resources to optimize energy cost, carbon usage, and grid reliability.
Fliar Intelligence Index™ 72how this company ranks against its industry peers
Funding
top 19%Patents
top 24%Moat
top 26%Innovation
top 28%Talent
top 38%Tech
top 39%Funding: Raised $150M across 3 rounds · 3 rounds over 8 yrs (0.4/yr) · Last round Conventional Debt (Oct 2025)
Patents: 173 patents matched (strict assignee match) · 88 filings since 2022 vs 85 in 2017-21 · Latest publication 2025
Moat: Editorial + unicorn rating 8/10 · IP moat: 173 patents · Soonicorn
Audience (LinkedIn): 10k LinkedIn followers
Funding rounds
- Oct 2025Conventional Debt$600M
- Nov 2024PE$500M
- Nov 2021Series D$150M
- Jul 2018Conventional Debt—
Founders & team
Investors
Hanwhasolutions, SBI Group, Blackstone
Tech stack
Amazon Web ServicesApple Icloud MailCloudflareCloudflare Bot ManagementCore-JsElementor
#12
Series D · Los Angeles, California · founded 2019 · 34 employees$55Mraised▾
Series D · Los Angeles, California · founded 2019 · 34 employees
Developer of portable nuclear microreactors designed to replace diesel generators. The company offers a compact reactor with equipment to generate electricity. The reactors leverage air cooling and high-speed turbomachinery. The units can provide thermal power for facility heating or water desalination. The fuel is designed to be meltdown-proof. The reactors are assembled, fueled, and tested in the factory. After fuel depletion, the entire container is shipped back for refueling.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Funding
top 26%Growth
top 28%Moat
top 37%Market
bottom 49%Talent
bottom 49%Tech
bottom 41%Funding: Raised $55.0M across 7 rounds · 7 rounds over 6 yrs (1.2/yr) · Last round Series D (Dec 2025)
Growth: Web rank 10,000,000 → 5,000,000 YoY · Fresh capital in last 24 mo
Moat: Editorial + unicorn rating 4/10 · Unicorn · 9 curated direct competitors tracked
Audience (LinkedIn): 35k LinkedIn followers — 6.7% of this cohort's audience · 217 engagements/post (7.2× cohort median)
Funding rounds
- Dec 2025Series D$300M
- Feb 2025Series C$66M
- Oct 2024Series C$100M
- Apr 2023Series B$40.7M
Founders & team
Investors
Union Square Ventures, Boost VC, Cantos Ventures, Tribe Capital, Decisive Point, McKinley Capital
Tech stack
Apple Icloud MailCloudflareCloudflare Browser InsightsCloudflare Rocket LoaderCore-JsDocusign
Funding & investor landscape
$21.5Btotal disclosed funding
609companies funded
2,176disclosed rounds
11rounds last 90 days
Most active investors
Notable founders
Suryaprakash Ganti
Co-Founder & CTO · Frore Systems
Seshu Madhavapeddy
Co-Founder & CEO · Frore Systems
Jireh Seow
Co-Founder · SPAN
Arch Rao
Founder & CEO · SPAN
Mike Phillips
Co-founder · Sense
Ryan Houlette
SVP Engineering & Technology / Cofounder · Sense
Al Subbloie
Founder & CEO · Budderfly
Josh Teekell
Founder & CEO · SmartAC.com
Mark Chung
Co-Founder & CEO · Verdigris
Jonathan Chu
Cofounder · Verdigris
Arvin Vohra
Co-Founder & CEO · Redaptive
Manesh Shah
Chief Administrative & Legal Officer · Redaptive
Prism market signals · United States · country-scoped Prism corpus, 1,608,968 docs
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH SIGNALS · United States
How research on Energy Efficiency & Buildings is moving in the United States
A read on the academic research around Energy Efficiency & Buildings — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 2,722 United States-affiliated papers.
research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and intensifying — the enthusiastic (strongly-positive) share moved 29% → 55% across 2008–2026.
top research entities
- Purdue University West Lafayette140
- Oak Ridge National Laboratory127
- National Laboratory of the Rockies80
- Georgia Institute of Technology53
- Electric Power Research Institute53
leading researchers
Bo Shen · Xiaobing Liu · Mo–Yuen Chow · Peter L. Munk · Van Baxter · Osama A. Mohammed · Lingfeng Wang · USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
▲
Breakthroughs565 · 21%
▲ 13%→26% share
▲2.0× share momentum2 median citations56% since 2021mostly methods-led
Radiative cooling research is surging — papers jumped from 1 to 50, with emissivity and radiative transfer newly emerging as distinct sub-topics.
rising sub-themes (early→recent)
- Radiative cooling1→50
- Passive cooling7→42
- Emissivity1→26
- Renewable energy14→38
- Thermal6→27
Newly emergingRadiative transfer 0→24 · Model predictive control 0→13 · Coating 0→9
Landmark Scalable-manufactured randomized glass-polymer hybrid metamaterial for daytime radiative cooling · 2,273 cites
◆
Advancements1,609 · 59%
▼ 65%→55% share
▼0.8× share momentum2 median citations40% since 2021mostly methods-led
Renewable energy advancements are intensifying — papers rose from 63 to 89, alongside energy storage doubling from 22 to 48.
rising sub-themes (early→recent)
- Radiative cooling10→39
- Renewable energy63→89
- Energy storage22→48
- Photovoltaic system35→53
- Thermal35→53
Newly emergingSetpoint 0→6 · Workflow 0→5 · Daytime 0→5
Landmark Terrestrial radiative cooling: Using the cold universe as a renewable and sustainable energy source · 791 cites
▼
Concerns253 · 9%
▼ 10%→9% share
▼0.9× share momentum2 median citations45% since 2021mostly empirical
Refrigerant concerns are newly emerging while heat pump reliability issues persist, rising from 40 to 47 papers.
rising sub-themes (early→recent)
- Renewable energy7→17
- Electricity2→9
- Heat pump40→47
- Energy management14→18
- Microgrid2→6
Newly emergingRefrigerant 0→7
Landmark Battery Management System: An Overview of Its Application in the Smart Grid and Electric Vehicles · 927 cites
RESEARCH HOTSPOTS · United States
Where energy efficiency is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
SF Bay Area82 · +0.49
Boston70 · +0.56
Atlanta57 · +0.56
New York34 · +0.55
Los Angeles31 · +0.65
Philadelphia26 · +0.50
San Diego21 · +0.64
Austin21 · +0.58
Pittsburgh18 · +0.46
Ann Arbor15 · +0.49
PATENT SIGNAL · United States
Who's filing energy efficiency patents in the United States
United States energy efficiency patent filing is accelerating — 3,337 filings from 1,859 assignees (2016–2025), led by Carrier, Intel, Rheem MFG; annual filings 315→449.
3,337 filings1,859 assigneespeak 470/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
- Carrier431
- Intel178
- Rheem MFG177
- General Electric172
- Johnson Controls TECH123
- Haier US Appliance Solutions108
- FORD Global TECH108
- Lennox IND79
Common questions
How many Energy Efficiency Tech companies are there in United States?
Radar tracks 2011 indexable Energy Efficiency Tech companies headquartered in United States that meet our profile-completeness bar.
What is the total funding raised by Energy Efficiency Tech companies in United States?
The Energy Efficiency Tech companies in United States on this list have raised a combined $21.5B in disclosed equity funding across 609 funded companies.
Which is the highest-funded Energy Efficiency Tech company in United States?
View is the highest-funded Energy Efficiency Tech company in United States, with $3.5B in disclosed equity funding.
How many Energy Efficiency Tech companies in United States are funded?
609 of the 2011 Energy Efficiency Tech companies in United States on this list have disclosed at least one equity funding round.
How many Energy Efficiency Tech unicorns are there in United States?
7 Energy Efficiency Tech companies in United States on this list are valued at $1B or more.
Who are the top investors in United States Energy Efficiency Tech companies?
The most active investors in United States Energy Efficiency Tech companies on this list include OSTI, National Science Foundation, DOE, Greentown Labs, Techstars.
Rohit KhannaTrends & Stories
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.