Radar · Energy Efficiency Tech in San Francisco
Best Energy Efficiency Tech Companies in San Francisco, United States
The 78 best Energy Efficiency Tech companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Redaptive.
By Rohit KhannaTrends & Stories
78companies tracked
$1.9Bdisclosed funding
1unicorns
43have raised
FLIAR INTELLIGENCE · ENERGY EFFICIENCY TECH × SAN FRANCISCO
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
239kcombined LinkedIn audience
54%of audience held by top 3
2companies hiring publicly (12 mo)
Ranked: Best Energy Efficiency Tech companies in San Francisco
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 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 | Top 5M | — | — |
| 2 | 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 | Top 1M | 78 patents Smart electrical distribution panels and load management for residential/commercial energy systems | 1 job opening |
| 3 | 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%) | Zach Supalla Co-Founder & CEO | Cart FunctionalityShopifyApple iCloud Mail+31 | Top 5M | 5 patents Digital design tools and pharmaceutical formulations for skin treatment and immersive audio/VR devices. | 1 launch |
| 4 | 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%) | Jason Dibona CEO | ShopifyApple iCloud MailMicrosoft 365+16 | Top 1M | 77 patents Indoor air purification and disinfection using photocatalytic, UV, and filtration technologies | — |
| 5 | OhmConnect Provider of energy management software solutions | $90M | 48 mo ago | 77 | — | Amazon WebstoreWebflowApple iCloud Mail+29 | Top 5M | — | — |
| 6 | 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 | Top 5M | — | 1 partnership |
| 7 | Sunverge Developer of smart energy storage and energy management systems | $75M | 36 mo ago | 33 | Dean Sanders Co-Founder & CTO | — | — | — | — |
| 8 | Nexant Offering solutions for demand response for distribution and transmission | $65M | 191 mo ago | 375 | John Gustafson CEO | — | — | 6 patents Optimizing electrical grid energy distribution and advanced fuel cell stack design. | — |
| 9 | Carbon Lighthouse Provider of project management services for commercial and industrial industries | $60M | 84 mo ago | 32 32 → 30 (-6%) | Brenden Millstein Co-Founder | — | — | — | — |
| 10 | Leap Provider of demand response management solutions | $58M | 30 mo ago | 49 | Thomas Folker Co-Founder & CEO | Framer SitesReactAmazon Web Services+13 | Top 10M | 29 patents Microwave-based mobile pavement recycling and on‑site asphalt production systems | — |
| 11 | Therma Provider of solutions for temperature and humidity monitoring | $37M | 40 mo ago | 28 28 → 48 (+71%) | — | — | — | 74 patents Advanced cryopreservation methods and anti‑ice biomaterials for organ and tissue preservation | — |
| 12 | Gradient Provider of smart HVAC products for residential applications | $27M | 35 mo ago | 61 61 → 53 (-13%) | Vince Romanin Co-Founder | Cart FunctionalityShopifyShop Pay+24 | Top 5M | 28 patents Therapeutic bioelectrical stimulation and membrane charge modulation devices, plus agricultural pitch plow technology. | 1 partnership |
| 13 | Choose Energy Online marketplace offering solutions for energy comparisons | $26M | 135 mo ago | 48 | — | Node.jsTailwind CSSReact+18 | Top 1M | — | — |
| 14 | Adura Technologies Innovative lighting and control solutions for indoor, outdoor, and specialty applications | $26M | 169 mo ago | 5 | Khloe Austin Co-CEO | SitecoreApple iCloud MailVideoJS+32 | Top 500k | 5 patents Wireless IoT lighting control and remote electrical load management systems | — |
| 15 | adura technologies Adura Technologies develops enabling technologies for commercial building lighting control and energy… | $26M | 169 mo ago | 14 | — | — | — | 5 patents Wireless lighting control systems with sensor integration and location-based provisioning | — |
| 16 | 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 | Top 10M | 18 patents Autonomous multicopter security cameras with precision auto‑landing and sensor‑fusion surveillance | — |
| 17 | Safehub Developer of sensor solution for infrastructural risk and damage assessment | $19M | 63 mo ago | 18 | — | — | — | 3 patents Real-time structural health monitoring of buildings and residential occupancy detection systems. | 1 launch · 3 partnerships · 1 award |
| 18 | GlacierGrid Provider of energy management solutions | $19M | 27 mo ago | — | Manik Suri Co-Founder & CEO | HubSpot CMS HubApple iCloud MailGoogle Workspace+23 | Top 10M | 2 patents Industrial energy management and PWM-based equipment power control | — |
| 19 | Lifi Labs Provider of building energy management solutions | $14M | 141 mo ago | 48 | — | Cart FunctionalityShopifyBootstrap+21 | Top 1M | 77 patents Smart integrated lighting and power modules with optical data connectivity | — |
| 20 | Silvair Wireless technology lighting platform provider for manufacturers | $13M | 115 mo ago | — | Szymon Slupik President | TypeScriptZone.jsAngular+9 | Top 50M | 3 patents Mesh-enabled IoT lighting and building automation control systems | — |
| 21 | NodePrime Datacenter management platform | $8M | 128 mo ago | 25 | — | — | — | — | — |
| 22 | 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 | Top 5M | — | — |
| 23 | SkyCool Systems Provider of radiative cooling systems | $5M | 12 mo ago | 11 | Eli Goldstein CEO | WordPressMySQLPHP+21 | Top 10M | — | 1 award |
| 24 | HomeBoost Online platform providing home energy assessment solutions | $4M | 19 mo ago | — | Adam Sussman Co-Founder | WordPressMySQLPHP+31 | Top 10M | — | 1 job opening |
| 25 | WexusTechnologies Energy Efficiency management app | $4M | 133 mo ago | 8 | — | — | — | — | — |
| 26 | SHYFT Power Solutions Provider of end-to-end energy metering and monitoring solutions | $4M | 62 mo ago | 21 | Cole Clayton Co-Founder & Chief Technical Officer | Squarespace CommerceSquarespaceTypeScript+13 | Top 50M | — | — |
| 27 | nodaFi Provider of software for managing facility operations, tasks, assets, and spend | $4M | 23 mo ago | — | Michael Loyda Co-Founder and Chief Revenue Officer | — | — | — | 1 internship |
| 28 | AuditMate SaaS-driven elevator maintenance management solution for residential and commercial spaces | $4M | 35 mo ago | 11 11 → 21 (+91%) | Ash Wilson Founder & CEO | WordPressMySQLPHP+27 | Top 50M | — | — |
| 29 | WattIQ Provider of asset management solutions | $3M | 114 mo ago | 16 | — | — | — | — | — |
| 30 | Zuli Control and monitor lights and appliances from your smartphone using Bluetooth Low Energy. | $2M | 141 mo ago | 11 | — | — | — | 9 patents Medical therapy for cardiovascular/HIV and industrial equipment monitoring & scheduling software | — |
| 31 | Biscuit Labs Offering AI powered SaaS energy management platform | $2M | — | 5 | Timothy Curnew CEO | — | — | — | — |
| 32 | InviscidAI Developer of physics-informed artificial intelligence platform for building system optimization | $500K | 5 mo ago | — | Kabir Jain Co-Founder | — | — | — | — |
| 33 | EcoDomus BIM software for 3D modelling | $500K | 108 mo ago | 20 | — | — | — | — | — |
| 34 | SRECTrade Provider of environmental commodity management, transaction, and technology solutions | $500K | 181 mo ago | 54 54 → 27 (-50%) | — | PHPSalesforceamCharts+15 | Top 500k | — | — |
| 35 | Ionate AI based platform for monitoring and orchestration | $250K | 90 mo ago | 16 | Ajanta Adhikari Co-Founder & CEO | — | — | 2 patents Legacy software modernization platform for automated code analysis and transformation | — |
| 36 | AdeptDC AI powered data center management software | $150K | 131 mo ago | 3 | Rajat Ghosh Co-Founder & CEO | — | — | 4 patents AI-driven power and workload optimization for data center resource allocation | — |
| 37 | Cambio Provider of a real estate sustainability platform | $125K | 5 mo ago | 7 | Elvis Wong Co-Founder | WebflowAmazon Web ServicesCloudflare Turnstile+19 | Top 10M | — | — |
| 38 | Electric Air Developer of smart heating and cooling systems | $125K | 36 mo ago | 1 | Chris Mui Founder | WebflowApple iCloud MailGoogle Workspace+16 | Top 10M | — | — |
| 39 | BuildScience Building management platform providing data-driven insights for smarter commercial buildings | $120K | 135 mo ago | 2 | — | — | — | — | — |
Top 12 Energy Efficiency Tech companies in San Francisco
#1
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 — 14.8% of this cohort's audience · 43 engagements/post (2.4× cohort median)
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
#2
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 — 29.5% 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
#3
Series B · San Francisco, California · founded 2014 · 13 employees$7.6Mraised▾
Series B · San Francisco, California · founded 2014 · 13 employees
Manufacturer of home automation devices for temperature control. Its device is equipped with Bluetooth, sensors. The vent works with existing internet-connected thermostats to adjust the temperature in individual rooms being used, using occupancy sensors and historical occupancy data. It can also be paired with existing connected cooling units to control temperature. Its systems can be controlled via smartphones, tablets, and smartwatches.
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Tech
top 26%Growth
top 35%Funding
top 37%Talent
top 38%Customers
top 39%Moat
top 39%Tech: 60 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Devops: Envoy
Growth: Fresh capital in last 24 mo
Funding: Raised $7.6M across 4 rounds · 4 rounds over 11 yrs (0.4/yr) · Last round Series B (Mar 2026)
Funding rounds
- Mar 2026Series B—
- Dec 2024Series A—
- Sep 2022Series A$7.6M
- Feb 2022Seed$108.5K
Founders & team
Investors
HAX, Active Impact Investments, Lowercarbon Capital, SOSV, Skyview Capital, Resilience Capital Partners
Tech stack
Amazon PayAmazon S3Amazon SesAmazon Web ServicesAmerican ExpressApple Pay
#4
Series B · San Francisco, California · founded 2016 · 30 employees$22.1Mraised▾
Series B · San Francisco, California · founded 2016 · 30 employees
Provider of AI-driven home security solutions using smart lighting and drones. The smart lights are integrated into a stick form factor that also contains motion sensors to detect intruders. The stick can be stuck on the grounds of a house and when a trespasser is detected. When unusual activity is detected, the companion drone can be sent to collect video. The drone is a quadcopter that flies autonomously and records video using a combined IR and optical camera.
Fliar Intelligence Index™ 62how this company ranks against its industry peers
Funding
top 31%Innovation
top 35%Growth
top 35%Patents
top 36%Moat
top 37%Talent
top 38%Funding: Raised $22.1M across 5 rounds · 5 rounds over 10 yrs (0.5/yr) · Last round Series B (Nov 2025)
Innovation: 18 patents (top 54% of patent-holders) · 5 filings since 2022 vs 3 in 2017-21 · Deep-tech classification: Tech Hardware
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 6k LinkedIn followers — 2.6% of this cohort's audience
Funding rounds
- Nov 2025Series B$16M
- Dec 2023Series A$1.5M
- Jan 2022Series A$15M
- 2019Seed—
Founders & team
Investors
General Catalyst, Stanley Ventures, Gentian Investments, Drone Fund, All Turtles, Pbfs.com
Tech stack
Framer SitesGoogle MapsGoogle Tag ManagerGoogle WorkspaceHstsHttp/3
#5
Public · San Francisco, California · founded 2014 · 92 employees$97.9Mraised▾
Public · San Francisco, California · founded 2014 · 92 employees
Manufacturer of air purification and humidification devices with filtration technology. The company offers air purifiers utilizing PECO technology alongside HEPA filtration. These devices aim to remove pollutants, allergens, and other particles from indoor air. The company also provides humidifiers designed to maintain comfortable humidity levels. Replacement filters for the air purification devices are available for purchase.
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Funding
top 28%Innovation
top 29%Patents
top 29%Product
top 34%Moat
top 38%Tech
top 41%Funding: Raised $97.9M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) · Last round Post IPO (May 2025)
Innovation: 77 patents (top 23% of patent-holders) · 39 filings since 2022 vs 38 in 2017-21 · 11 product lines
Patents: 77 patents matched (strict assignee match) · 39 filings since 2022 vs 38 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 11k LinkedIn followers — 4.4% of this cohort's audience
Funding rounds
- May 2025Post IPO$6.6M
- May 2023Post IPO$10M
- Sep 2021Angel—
- Aug 2020Angel—
Founders & team
Investors
Founders Circle Capital, Inventec, Crosslink Capital, Uncork Capital, TransLink Capital, Foundry
Tech stack
Animate.CssApple Icloud MailApple PayBootstrapCart FunctionalityCloudflare
#6
Acquired · San Francisco, California · founded 2011 · 109 employees$129.9Mraised▾
Acquired · San Francisco, California · founded 2011 · 109 employees
Developer of a prototype to production connectivity platform for IoT. Its Photon Wi-Fi and the Electron 2G3G cellular are primary prototyping platforms for integrating connectivity into devices. The product is primarily aimed at designers and developers rather than at enterprises.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Tech
top 23%Funding
top 24%Customers
top 24%News
top 30%Moat
top 35%Growth
top 40%Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Devops: Nginx
Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) · Last round Series C (Mar 2025)
Customers: App rating 4.2★ (289 reviews) · Marquee-customer mentions: top 30% of tracked companies
Audience (LinkedIn): 24k LinkedIn followers — 10.2% of this cohort's audience
Activity (LinkedIn): 1 product launches announced in 12 mo
Funding rounds
- Mar 2025Series C$5M
- Dec 2022Series C$12.2M
- Nov 2021Series C$30M
- Nov 2019Series C$40M
Founders & team
Investors
O'Reilly AlphaTech Ventures, Root Ventures, HAX, Collab Fund, Spark Capital, Qualcomm Ventures
Tech stack
AceAmazon CloudfrontAmazon S3Amazon Web ServicesAmerican ExpressApple Icloud Mail
#7
Acquired · San Francisco, California · founded 2020 · 50 employees$78Mraised▾
Acquired · San Francisco, California · founded 2020 · 50 employees
Usage-based invoice management solutions for small businesses. It features solutions for invoice generation, custom credit pools, cost-basis tracking, tiering, and more. It offers cloud marketplace integrations, and automates order-to-cash with integrations for accounting, quoting, & invoicing platforms.
Fliar Intelligence Index™ 60how this company ranks against its industry peers
Funding
top 24%Talent
top 28%Moat
top 31%Growth
top 35%Tech
top 39%Market
bottom 41%Funding: Raised $78.0M across 4 rounds · 4 rounds over 4 yrs (1.0/yr) · Last round Series C (Feb 2025)
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Moat: Editorial + unicorn rating 8/10 · Soonicorn · 9 curated direct competitors tracked
Audience (LinkedIn): 17k LinkedIn followers — 7.2% of this cohort's audience
Activity (LinkedIn): 1 partnerships (incl. Metronome) announced in 12 mo
Funding rounds
- Feb 2025Series C$50M
- Jan 2024Series B$43M
- Feb 2022Series A$30M
- Seed$5M
Founders & team
Investors
Andreessen Horowitz, General Catalyst, New Enterprise Associates, Greyhound Capital, Activant Capital, Workday
Tech stack
Amazon AlbAmazon CloudfrontAmazon SesAmazon Web ServicesApple Icloud MailAws Certificate Manager
#8
Seed · San Francisco, California · founded 2016 · 11 employees$5Mraised▾
Seed · San Francisco, California · founded 2016 · 11 employees
Provider of radiative cooling systems. It cools the water with no electricity and without evaporating water. The panel in which the optical properties of three materials are stacked and operate in unison, allows it to overcome the radiation and reduce its temperature.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 3k LinkedIn followers
Activity: 1 awards announced in 12 mo
Funding rounds
- May 2025Grant (prize money)$275.3K
- Jan 2025Grant (prize money)$3.5M
- Aug 2023Seed$5M
- Feb 2021Grant (prize money)$3.5M
Founders & team
Investors
CalSEED, Dao Ventures, DOE, ARPA-E, Nadel and Gussman, D3 Jubilee Partners
Tech stack
CloudflareCloudflare Bot ManagementDiviGoogle AnalyticsGoogle Font ApiGoogle Hosted Libraries
#9
Seed · San Francisco, California · founded 2016$500Kraised▾
Seed · San Francisco, California · founded 2016
Developer of physics-informed artificial intelligence platform for building system optimization. The platform provides digital twins that optimize heating, ventilation, and air conditioning, lighting, and energy systems. It integrates with building management systems and processes sensor streams. The platform transforms computational fluid dynamics simulation using neural networks.
Funding rounds
- Jan 2026Seed$500K
Founders & team
Investors
Y Combinator
#10
Series A · San Francisco, California · founded 2021 · 7 employees$125Kraised▾
Series A · San Francisco, California · founded 2021 · 7 employees
Provider of a real estate sustainability platform. This platform assists real estate owners in managing their assets' sustainability compliance and retrofits. It integrates directly with utility data to provide real-time performance monitoring and automate risk tracking. The platform also offers tools for capital planning and retrofitting, generating recommendations and predicting the impact on investment returns and emissions reductions. The platform aims to streamline data management and improve efficiency in sustainability initiatives.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 7k LinkedIn followers — 3.0% of this cohort's audience
Activity: 1 product launches · 2 partnerships (incl. Cambio) announced in 12 mo
Funding rounds
- Jan 2026Series A$18M
- 2023Seed$125K
- 2022Seed$500K
Founders & team
Investors
Y Combinator, Leonis Investment, Maverick Ventures, Adverb Ventures, Peterson Ventures, ASC Venture Capital
Tech stack
Amazon S3Amazon Web ServicesCdnjsCloudflareCloudflare TurnstileGoogle Analytics
#11
Series B · San Francisco, California · founded 2017 · 49 employees$58Mraised▾
Series B · San Francisco, California · founded 2017 · 49 employees
Provider of demand response management solutions. It offers a platform that provides demand solutions and enables users to earn its revenue by shifting energy consumption. Its features include meter data collection, bid matching, customer authorization, API connection, and much more.
Funding rounds
- Nov 2023Series B—
- Jun 2023Series B$16.3M
- Nov 2021Series B—
- Oct 2021Series B$33.5M
Founders & team
Investors
Union Square Ventures, Congruent Ventures, National Grid Partners, Elemental, FJ Labs, Powerhouse
Tech stack
Amazon Web ServicesCloudflareCloudflare Bot ManagementFramer SitesGoogle AnalyticsGoogle Font Api
#12
Seed · San Francisco, California · founded 2023$4Mraised▾
Seed · San Francisco, California · founded 2023
Online platform providing home energy assessment solutions. It reduce energy bills, improve comfort, and lower environmental impact through its DIY energy assessment kit. The company's innovative solution provides homeowners with a comprehensive understanding of their energy usage, allowing them to take control of their energy consumption and make data-driven decisions to optimize their home's energy efficiency.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 1k LinkedIn followers
Hiring: 1 hiring post in 12 mo (public) · hiring: Full Stack Engineer
Activity: 1 awards announced in 12 mo
Funding rounds
- Oct 2024Seed$4M
Founders & team
Investors
True Ventures, Gigascale Capital, Incite
Tech stack
Amazon CloudfrontAmazon Web ServicesCloudflareCloudflare Bot ManagementCookiebotCore-Js
Funding & investor landscape
$1.9Btotal disclosed funding
39companies funded
124disclosed rounds
1rounds last 90 days
Most active investors
Y Combinator4 rounds
Notable founders
Jireh Seow
Co-Founder · SPAN
Arch Rao
Founder & CEO · SPAN
Arvin Vohra
Co-Founder & CEO · Redaptive
Manesh Shah
Chief Administrative & Legal Officer · Redaptive
Kenny Tay
Co-Founder & CTO · Flair Systems
Daniel Myers
Co-Founder & CEO · Flair Systems
Chris Eheim
Founder + CTO · Sunflower Labs
Alex Pachikov
Co-Founder & CEO · Sunflower Labs
Jason Dibona
CEO · Molekule
Zach Supalla
Co-Founder & CEO · Particle
Ledion Bitincka
Co-Founder and CTO · Metronome
Scott Woody
Co-Founder & CEO · Metronome
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
Breakthroughs are rising (13%→26% of field), led by Radiative cooling.
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
Advancements are cooling (65%→55% of field), led by Radiative cooling.
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
Concerns are cooling (10%→9% of field), led by Renewable energy.
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
- Carrier430
- Intel178
- Rheem MFG177
- General Electric172
- Johnson Controls TECH123
- FORD Global TECH108
- Haier US Appliance Solutions108
- Lennox IND79
Common questions
How many Energy Efficiency Tech companies are there in San Francisco, United States?
Radar tracks 78 indexable Energy Efficiency Tech companies headquartered in San Francisco, United States that meet our profile-completeness bar.
What is the total funding raised by Energy Efficiency Tech companies in San Francisco, United States?
The Energy Efficiency Tech companies in San Francisco, United States on this list have raised a combined $1.9B in disclosed equity funding across 39 funded companies.
Which is the highest-funded Energy Efficiency Tech company in San Francisco, United States?
Redaptive is the highest-funded Energy Efficiency Tech company in San Francisco, United States, with $726.5M in disclosed equity funding.
How many Energy Efficiency Tech companies in San Francisco, United States are funded?
39 of the 78 Energy Efficiency Tech companies in San Francisco, United States on this list have disclosed at least one equity funding round.
How many Energy Efficiency Tech unicorns are there in San Francisco, United States?
1 Energy Efficiency Tech company in San Francisco, United States on this list is valued at $1B or more.
Who are the top investors in San Francisco, United States Energy Efficiency Tech companies?
The most active investors in San Francisco, United States Energy Efficiency Tech companies on this list include Climate Capital, Collab Fund, Elemental, HAX, Third Sphere.
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.