Radar · Energy Efficiency in United States
Best Energy Efficiency Companies in United States
The 953 best Energy Efficiency companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Conduit Power.
By Riya SenguptaFinancials
953companies tracked
$1.3Bdisclosed funding
1unicorns
108have raised
Ranked by disclosed equity funding and recent momentum, the 953 Energy Efficiency companies we track across the United States have pulled in $1.3B in total disclosed funding, with Conduit Power alone accounting for $200M of that. One unicorn sits in the mix. But the funding story isn't the whole story. Look at the revenue filings and you feel real scale: nine validated filers show a combined revenue pool of roughly $4.4B, with a sector median of $23M and median growth running at 24% YoY. Legence Corp. clears $2.6B. Aaon, Inc. hit $497M on 54% YoY growth. Tampa Electric Co. posted $802M, also up 24%. These aren't projections. They're earned dollars, and behavioral factors around adoption remain a live variable shaping how fast that revenue base grows.
So what does the momentum picture look like? App install growth across 138 energy-sector apps is running at a median of 28% YoY, which tells you demand is translating into active engagement, not just awareness. Hot themes clustering around solar PV and photovoltaic systems are driving the conversation, even as overall coverage stays flat. I'd watch the gap between that $23M median and the outsized earners carefully: Legence Corp. sits at 45x the sector median, Tampa Electric at 35x. If you're trying to identify where real capital concentration lives in U.S. Energy Efficiency, the revenue filings answer that faster than any funding announcement will.
Sources & further reading
- Turning wind into power off the Wilmington coast could be a decade away
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- 'A huge opportunity here': NH looks to offshore wind turbines for renewable ener
FLIAR INTELLIGENCE · ENERGY EFFICIENCY × UNITED STATES
Our analysis of 50 Energy Efficiency companies
$1.3b in tracked funding; 52% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2011.
50companies analysed
52%cloud-native stacks
2011funding peak (by rounds)
1unicorns
2007median founding year
148kcombined LinkedIn audience
66%of audience held by top 3
5companies hiring publicly (12 mo)
Ranked: Best Energy Efficiency companies in United States
| # | Company | Disclosed funding | Last round | Employees | Founded | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Conduit Power Provider of renewable power generation services 19Funding top 35%Talent bottom 49%Tech bottom 43%News bottom 40% All 6 signals ▾Fundingtop 35% Talentbottom 49% Techbottom 43% Newsbottom 40% Globalbottom 29% Marketbottom 19% Funding: Raised $200M across 1 rounds · 1 rounds over 4 yrs (0.2/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 19/100 | $200M | 2 mo ago | 14 | 2022 | Cart FunctionalitySquarespace CommerceSquarespace+15 | — | — | — |
| 2 | Konarka Technologies Develops and manufactures solar plastic films that convert light to electricity 65Innovation top 8%Patents top 22%Funding top 29%Global top 34% All 4 signals ▾Innovationtop 8% Patentstop 22% Fundingtop 29% Globaltop 34% Innovation: 285 patents (top 8% of patent-holders) Patents: 285 patents matched (strict assignee match) · Latest publication 2013 rank vs industry peers · Fliar Intelligence Index 65/100 | $150M | 135 mo ago | 37 | 2001 | — | — | 285 patents Patents concentrated in electrical & electronics | — |
| 3 | Serious Energy Energy efficient buildings 32Funding top 33%Market top 41%Global bottom 37%News bottom 27% All 5 signals ▾Fundingtop 33% Markettop 41% Globalbottom 37% Newsbottom 27% Techbottom 15% Funding: Raised $137M across 4 rounds · 4 rounds over 19 yrs (0.2/yr) Market: 106 employees (top 24% of Energy Efficiency) rank vs industry peers · Fliar Intelligence Index 32/100 | $137M | 174 mo ago | 106 | 2002 | — | — | — | — |
| 4 | Next Step Living Provider of online guides and resources for home living, well-being, and career development 45Funding top 28%Market top 39%Growth bottom 35%Global bottom 33% All 6 signals ▾Fundingtop 28% Markettop 39% Growthbottom 35% Globalbottom 33% Techbottom 30% Newsbottom 22% Funding: Raised $107M across 16 rounds · 16 rounds over 17 yrs (0.9/yr) Market: 145 employees (top 14% of Energy Efficiency) · Top-10,000,000 web property rank vs industry peers · Fliar Intelligence Index 45/100 | $107M | 125 mo ago | 145 | 2008 | WordPressMySQLPHP+7 | — | — | — |
| 5 | Modern Energy VC firm focused on investing in energy based technologies 55Innovation top 20%Talent top 23%Product top 32%Funding top 42% All 8 signals ▾Innovationtop 20% Talenttop 23% Producttop 32% Fundingtop 42% Growthtop 45% Marketbottom 48% Globalbottom 25% Techbottom 24% Innovation: 6 product lines Talent: 10 named leaders on record · 4 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 55/100 | $100M | 71 mo ago | 57 | 2007 | Concrete CMSPHPBootstrap+11 | — | — | — |
| 6 | Soraa Manufacturer of LED lighting solutions for commercial and residential applications 55Talent top 15%Patents top 27%Moat top 28%Innovation top 33% All 10 signals ▾Talenttop 15% Patentstop 27% Moattop 28% Innovationtop 33% Fundingtop 33% Markettop 43% Growthbottom 42% Globalbottom 38% Techbottom 28% Newsbottom 22% Talent: Analyst team rating 5/5 Patents: 496 patents matched (strict assignee match) · 6 filings since 2022 vs 149 in 2017-21 rank vs industry peers · Fliar Intelligence Index 55/100 | $94M | 151 mo ago | 229 | 2008 | Concrete CMSPHPYouTube+16 | — | 496 patents Advanced LED lighting with tunable spectra for circadian and health‑optimized illumination | — |
| 7 | US Lighting Group Manufacturer of LED-based lighting products 50Patents top 24%Growth top 27%Moat top 28%Product top 30% All 11 signals ▾Patentstop 24% Growthtop 27% Moattop 28% Producttop 30% Innovationtop 31% Fundingtop 47% Fin. healthbottom 48% Marketbottom 44% Globalbottom 40% Techbottom 24% Newsbottom 22% Patents: 1,542 patents matched (strict assignee match) · 35 filings since 2022 vs 708 in 2017-21 Growth: Revenue +235% YoY rank vs industry peers · Fliar Intelligence Index 50/100 | $53M | 90 mo ago | 29 | 1981 | — | — | 1,542 patents Advanced LED lighting fixtures with integrated control, heat management, and optical filtering | — |
| 8 | Revolution Lighting Technologies LED designing and manufacturing 45Market top 21%Funding top 31%Fin. health top 45%Moat bottom 49% All 10 signals ▾Markettop 21% Fundingtop 31% Fin. healthtop 45% Moatbottom 49% Talentbottom 49% Patentsbottom 40% Globalbottom 33% Growthbottom 32% Innovationbottom 28% Newsbottom 27% Market: 270 employees (top 6% of Energy Efficiency) · Revenue ~$152M Funding: Raised $38.9M across 5 rounds · 5 rounds over 18 yrs (0.3/yr) rank vs industry peers · Fliar Intelligence Index 45/100 | $39M | 114 mo ago | 270 | 1991 | — | — | 13 patents Patents concentrated in computing, sensing & instrumentation | — |
| 9 | XGS Energy Provider of geothermal energy production services 57Innovation top 19%Patents top 23%Funding top 41%Moat top 45% All 8 signals ▾Innovationtop 19% Patentstop 23% Fundingtop 41% Moattop 45% Globalbottom 43% Newsbottom 42% Partnersbottom 32% Marketbottom 30% Innovation: 77 patents (top 28% of patent-holders) · 77 filings since 2022 vs 0 in 2017-21 Patents: 77 patents matched (strict assignee match) · 77 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 57/100 | $34M | 14 mo ago | 12 | 2008 | — | — | 77 patents Enhanced geothermal heat extraction via high‑thermal‑conductivity slurries and grout systems | 1 job opening · 2 partnerships |
| 10 | 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 | 2019 | 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 |
| 11 | Clean Hydrogen Works Developer of clean ammonia project focused on decarbonization of energy 8Funding top 35%Talent top 38%News bottom 35%Tech bottom 34% All 7 signals ▾Fundingtop 35% Talenttop 38% Newsbottom 35% Techbottom 34% Globalbottom 25% Marketbottom 22% Growthbottom 10% Funding: Raised $30.0M across 1 rounds · 1 rounds over 3 yrs (0.3/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 8/100 | $30M | 37 mo ago | 10 | 2021 | SwiperGoogle Font APIMicrosoft 365+6 | 3 signals ▼62% Lawsuit | — | — |
| 12 | NextEnergy Developer of non-renewable energy based power projects 50Innovation top 20%Tech top 45%Product top 46%Funding top 49% All 7 signals ▾Innovationtop 20% Techtop 45% Producttop 46% Fundingtop 49% Talentbottom 49% Globalbottom 29% Marketbottom 28% Innovation: 11 product lines Tech: 43 technologies across 3/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 50/100 | $23M | 176 mo ago | 20 | 2002 | WordPressMySQLPHP+28 | — | — | 1 partnership |
| 13 | TerraFlow Energy Developer of long-duration energy storage systems for data center applications 27Talent top 28%Funding top 41%Tech bottom 37%Global bottom 34% All 5 signals ▾Talenttop 28% Fundingtop 41% Techbottom 37% Globalbottom 34% Marketbottom 31% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Funding: Raised $20.4M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 27/100 | $20M | 8 mo ago | — | 2024 | WordPress Block EditorWordPressMySQL+18 | — | — | — |
| 14 | Healthe Provider of online baccarat and casino games. It offers a variety of baccarat games from multiple providers… 53Market top 35%Funding top 36%Moat bottom 49%Patents bottom 46% All 6 signals ▾Markettop 35% Fundingtop 36% Moatbottom 49% Patentsbottom 46% Globalbottom 35% Innovationbottom 32% Market: 135 employees (top 19% of Energy Efficiency) Funding: Raised $20.0M across 3 rounds · 3 rounds over 6 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 53/100 | $20M | 69 mo ago | 135 | 2019 | — | — | 17 patents UV-based pathogen sterilization and therapeutic lighting systems for health environments | — |
| 15 | AMP Provider of energy & batteries management services 62Growth top 30%Funding top 33%Market top 46%Talent bottom 49% All 6 signals ▾Growthtop 30% Fundingtop 33% Markettop 46% Talentbottom 49% Globalbottom 43% Newsbottom 22% Growth: Headcount 32 → 46 (+44%) across vintages Funding: Raised $17.2M across 1 rounds · 1 rounds over 5 yrs (0.2/yr) rank vs industry peers · Fliar Intelligence Index 62/100 | $17M | 43 mo ago | 46 | 2017 | — | — | — | — |
| 16 | SNTech Organizer of live music events in small venues 27Innovation top 30%Patents top 32%Moat top 45%Funding top 48% All 8 signals ▾Innovationtop 30% Patentstop 32% Moattop 45% Fundingtop 48% Talentbottom 45% Globalbottom 37% Newsbottom 24% Marketbottom 12% Innovation: 53 patents (top 30% of patent-holders) Patents: 53 patents matched (strict assignee match) · Latest publication 2018 rank vs industry peers · Fliar Intelligence Index 27/100 | $16M | 150 mo ago | 6 | 2007 | — | — | 53 patents Advanced motor control, communication, and sensor integration for pump and drive systems | — |
| 17 | Bolb Manufacturer of high-performance UVB/C solid-state emitters & UVC LEDs 37Patents top 32%Innovation top 39%Funding top 41%Growth top 45% All 9 signals ▾Patentstop 32% Innovationtop 39% Fundingtop 41% Growthtop 45% Moattop 45% Talentbottom 49% Techbottom 41% Globalbottom 40% Marketbottom 21% Patents: 90 patents matched (strict assignee match) · 32 filings since 2022 vs 53 in 2017-21 Innovation: 90 patents (top 21% of patent-holders) · 32 filings since 2022 vs 53 in 2017-21 rank vs industry peers · Fliar Intelligence Index 37/100 | $16M | 53 mo ago | 12 | 2014 | WordPressMySQLPHP+25 | — | 90 patents UV LED air-disinfection lighting and advanced LED current-spreading/packaging technologies. | — |
| 18 | Verne Developer of hydrogen storage and delivery solutions for various industries 19Innovation top 31%Patents top 33%Funding top 37%Partners top 40% All 10 signals ▾Innovationtop 31% Patentstop 33% Fundingtop 37% Partnerstop 40% Moattop 45% Newstop 48% Globalbottom 40% Talentbottom 40% Marketbottom 21% Growthbottom 10% Innovation: 25 patents (top 46% of patent-holders) · 25 filings since 2022 vs 0 in 2017-21 Patents: 25 patents matched (strict assignee match) · 25 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 19/100 | $16M | 26 mo ago | 5 | 2020 | — | 6 signals ▼54% Contracts · Announcements · M&A | 25 patents Patents concentrated in mechanical & energy engineering | — |
| 19 | GREEN CREATIVE Manufacture of LED lighting system 42Tech top 44%Growth top 45%Funding top 47%Talent bottom 49% All 6 signals ▾Techtop 44% Growthtop 45% Fundingtop 47% Talentbottom 49% Marketbottom 36% Globalbottom 32% Tech: 35 technologies across 4/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 42/100 | $15M | 122 mo ago | 22 22 → 20 (-9%) | 2010 | WordPressMySQLPHP+26 | — | — | 3 launchs · 1 award |
| 20 | General Resonance Provider of research & development services for energy 24Funding bottom 45%Talent bottom 45%Global bottom 25% All 3 signals ▾Fundingbottom 45% Talentbottom 45% Globalbottom 25% Funding: Raised $13.8M across 1 rounds · 1 rounds over 15 yrs (0.1/yr) Talent: 1 named leader on record rank vs industry peers · Fliar Intelligence Index 24/100 | $14M | 179 mo ago | — | 2003 | — | — | — | — |
| 21 | Mojave Provider of electrochemical-based air conditioners 19Funding top 44%Talent bottom 49%Global bottom 37%Market bottom 31% All 5 signals ▾Fundingtop 44% Talentbottom 49% Globalbottom 37% Marketbottom 31% Newsbottom 21% Funding: Raised $12.5M · 2 rounds over 3 yrs (0.7/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 19/100 | $12M | 21 mo ago | 16 | 1902 | — | — | — | 4 job openings · 1 launch |
| 22 | Path Company Provider of infrastructure solutions for energy and water management. 53Patents top 31%Product top 32%Innovation top 37%Funding top 38% All 6 signals ▾Patentstop 31% Producttop 32% Innovationtop 37% Fundingtop 38% Globaltop 49% Techbottom 23% Patents: 46 patents matched (strict assignee match) · 15 filings since 2022 vs 13 in 2017-21 Product: 3 distinct product lines · Company stage: Acquired rank vs industry peers · Fliar Intelligence Index 53/100 | $12M | 12 mo ago | — | 2017 | WordPress Block EditorWordPressApple iCloud Mail+15 | — | 46 patents Nanostructured drug delivery systems and malaria vaccine formulations for targeted therapeutics. | — |
| 23 | Lime Energy Manufacturer of LED lights 79Market top 21%Fin. health top 25%Growth top 36%Funding top 42% All 6 signals ▾Markettop 21% Fin. healthtop 25% Growthtop 36% Fundingtop 42% Globalbottom 32% Newsbottom 27% Market: 282 employees (top 4% of Energy Efficiency) · Revenue ~$113M Fin. health: Revenue ~$113M (FY2016) · Net margin 4.1% rank vs industry peers · Fliar Intelligence Index 79/100 | $12M | 134 mo ago | 282 | 1997 | — | — | — | — |
| 24 | Lighting Science Group LED bulbs manufacturer 35Patents top 33%Innovation top 36%Funding top 36%Moat top 41% All 8 signals ▾Patentstop 33% Innovationtop 36% Fundingtop 36% Moattop 41% Fin. healthbottom 45% Globalbottom 42% Marketbottom 28% Newsbottom 27% Patents: 510 patents matched (strict assignee match) · 0 filings since 2022 vs 65 in 2017-21 Innovation: 510 patents (top 4% of patent-holders) · 0 filings since 2022 vs 65 in 2017-21 rank vs industry peers · Fliar Intelligence Index 35/100 | $11M | 129 mo ago | 2 | 1996 | — | — | 510 patents Smart adaptive lighting systems integrating tunable spectra, environmental sensing, and therapeutic functions | — |
| 25 | Albeo Technologies LED commercial lighting and controls solutions for diverse applications 76Market top 21%Tech top 24%Patents top 24%Product top 32% All 10 signals ▾Markettop 21% Techtop 24% Patentstop 24% Producttop 32% Innovationtop 33% Fundingtop 42% Globaltop 48% Talentbottom 49% Growthbottom 48% Newsbottom 48% Market: 700 employees (top 1% of Energy Efficiency) · Top-1,000,000 web property Tech: 62 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services rank vs industry peers · Fliar Intelligence Index 76/100 | $11M | 170 mo ago | 700 | 1911 | Amazon WebstoreDrupalPHP+33 | — | 32 patents Thermal‑managed LED lighting modules and fixtures with integrated glare shielding | — |
| 26 | Orion Energy Systems Provider of energy-efficient LED lighting solutions and EV charging services 57Partners top 15%Market top 33%News top 36%Funding top 40% All 8 signals ▾Partnerstop 15% Markettop 33% Newstop 36% Fundingtop 40% Fin. healthtop 40% Techtop 49% Growthtop 50% Globalbottom 32% Partners: 6 contract events in 12 mo · Named contractor/client in 6 deals Market: 231 employees (top 9% of Energy Efficiency) · Revenue ~$79.7M rank vs industry peers · Fliar Intelligence Index 57/100 | $10M | 91 mo ago | 231 231 → 215 (-7%) | 1996 | HubSpot CMS HubSalesforceEnvoy+23 | 17 signals Earnings · Contracts · IPO | — | 4 launchs |
| 27 | Luminit Light Shaping Diffusers Manufacturer of holographic optical elements and LED light shaping diffusers. 62Innovation top 20%Funding top 32%Product top 32%Talent bottom 49% All 7 signals ▾Innovationtop 20% Fundingtop 32% Producttop 32% Talentbottom 49% Globalbottom 33% Techbottom 22% Newsbottom 22% Innovation: 8 product lines Funding: Raised $10.3M across 12 rounds · 12 rounds over 19 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 62/100 | $10M | 6 mo ago | 47 | 2005 | — | — | — | 1 job opening |
| 28 | Zenergy Brands Provides building automation systems for commercial and industrial sectors 11Talent bottom 49%Funding bottom 41%Market bottom 31%Global bottom 25% All 5 signals ▾Talentbottom 49% Fundingbottom 41% Marketbottom 31% Globalbottom 25% Fin. healthbottom 24% Talent: 1 named leader on record · 1 C-suite/founder profile curated Funding: Raised $10.0M across 1 rounds · 1 rounds over 7 yrs (0.1/yr) rank vs industry peers · Fliar Intelligence Index 11/100 | $10M | 89 mo ago | 15 | 2017 | — | — | — | — |
| 29 | Fulham LED modules and drivers manufacturer 35Growth top 42%Funding top 49%Tech top 49%Moat bottom 49% All 9 signals ▾Growthtop 42% Fundingtop 49% Techtop 49% Moatbottom 49% Patentsbottom 45% Marketbottom 43% Globalbottom 43% Innovationbottom 23% Newsbottom 20% Growth: 1 acquisition/expansion move in 24 mo Funding: Raised $10.0M across 2 rounds · 2 rounds over 17 yrs (0.1/yr) rank vs industry peers · Fliar Intelligence Index 35/100 | $10M | 118 mo ago | 40 | 2008 | WordPressMySQLPHP+31 | — | 9 patents Patents concentrated in mechanical & energy engineering | 1 job opening |
| 30 | albeo technologies Albeo Technologies provides LED lighting solutions for industrial and commercial buildings. 45Innovation top 40%Patents top 43%Funding top 45%Moat top 45% All 8 signals ▾Innovationtop 40% Patentstop 43% Fundingtop 45% Moattop 45% Marketbottom 45% Techbottom 37% Globalbottom 37% Newsbottom 22% Innovation: 32 patents (top 40% of patent-holders) Patents: 32 patents matched (strict assignee match) · Latest publication 2015 rank vs industry peers · Fliar Intelligence Index 45/100 | $9M | 170 mo ago | 35 | 2004 | — | — | 32 patents Thermal‑integrated LED modules and glare‑controlled lighting fixtures | — |
| 31 | Energy Wall Provider of HVAC equipment rental services 50Innovation top 20%Product top 36%Funding bottom 44%Global bottom 25% All 5 signals ▾Innovationtop 20% Producttop 36% Fundingbottom 44% Globalbottom 25% Techbottom 24% Innovation: 7 product lines Product: 7 distinct product lines · Company stage: Series A rank vs industry peers · Fliar Intelligence Index 50/100 | $8M | 35 mo ago | 9 | 2008 | — | — | — | — |
| 32 | Deco Lighting Complete lighting solutions and manufacturer 67Innovation top 20%Product top 36%Market top 42%Funding bottom 47% All 6 signals ▾Innovationtop 20% Producttop 36% Markettop 42% Fundingbottom 47% Techbottom 40% Globalbottom 29% Innovation: 12 product lines Product: 12 distinct product lines · Company stage: Series A rank vs industry peers · Fliar Intelligence Index 67/100 | $8M | 105 mo ago | 56 | 2005 | — | — | — | — |
| 33 | Litesheet LiteSheet is an AC Direct LED lighting innovation company that develops and commercializes products. 5Funding bottom 47%Global bottom 35%Patents bottom 26%Innovation bottom 4% All 4 signals ▾Fundingbottom 47% Globalbottom 35% Patentsbottom 26% Innovationbottom 4% Funding: Raised $6.8M across 9 rounds · 9 rounds over 13 yrs (0.7/yr) Global: Single-market focus (United States) rank vs industry peers · Fliar Intelligence Index 5/100 | $7M | 67 mo ago | 8 | 2012 | — | — | 2 patents LED lighting control systems integrated with HVAC and building automation | — |
| 34 | Echogen Power Systems Developer of waste heat recovery and long-duration energy storage systems 37Patents top 37%Innovation top 41%Funding top 45%Talent bottom 49% All 7 signals ▾Patentstop 37% Innovationtop 41% Fundingtop 45% Talentbottom 49% Techbottom 45% Globalbottom 41% Marketbottom 37% Patents: 190 patents matched (strict assignee match) · 9 filings since 2022 vs 67 in 2017-21 Innovation: 190 patents (top 11% of patent-holders) · 9 filings since 2022 vs 67 in 2017-21 rank vs industry peers · Fliar Intelligence Index 37/100 | $5M | 12 mo ago | 21 | 2007 | Webflow EcommerceWebflowGSAP+14 | — | 190 patents Supercritical fluid heat engines and pumped thermal energy storage systems | 1 partnership · 1 award |
| 35 | Nextek Power Systems Power converter and smart controls acting as rectifier and regulator for improve the efficiency of power usage 8Talent bottom 45%Funding bottom 32%Market bottom 30%Global bottom 29% All 5 signals ▾Talentbottom 45% Fundingbottom 32% Marketbottom 30% Globalbottom 29% Techbottom 19% Talent: 1 named leader on record Funding: Raised $5.1M across 1 rounds · 1 rounds over 14 yrs (0.1/yr) rank vs industry peers · Fliar Intelligence Index 8/100 | $5M | 164 mo ago | 14 | 1995 | — | — | — | — |
| 36 | ENVOCORE Provider of water-utility project development and electrical retrofitting services 29Talent top 32%Tech top 44%Funding bottom 45%Market bottom 39% All 6 signals ▾Talenttop 32% Techtop 44% Fundingbottom 45% Marketbottom 39% Globalbottom 29% Growthbottom 24% Talent: Analyst team rating 5/5 · 1 named leader on record Tech: 34 technologies across 4/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 29/100 | $5M | 120 mo ago | 44 | 1993 | WordPressApple iCloud MailMicrosoft 365+29 | — | — | 1 job opening |
| 37 | Evolucia Design & manufacturer of LED lighting systems 6Talent top 45%Moat bottom 49%Funding bottom 39%Patents bottom 33% All 8 signals ▾Talenttop 45% Moatbottom 49% Fundingbottom 39% Patentsbottom 33% Globalbottom 29% Fin. healthbottom 22% Innovationbottom 21% Marketbottom 15% Talent: 2 named leaders on record Moat: Editorial + unicorn rating 1/10 · IP moat: 6 patents rank vs industry peers · Fliar Intelligence Index 6/100 | $5M | 152 mo ago | — | 2005 | — | — | 6 patents Advanced LED lighting modules with programmable light patterns for outdoor illumination. | — |
| 38 | LiteSheet Solutions LED lighting engine developer 6Funding bottom 48%Talent bottom 45%Moat bottom 42%Global bottom 31% All 6 signals ▾Fundingbottom 48% Talentbottom 45% Moatbottom 42% Globalbottom 31% Patentsbottom 26% Innovationbottom 4% Funding: Raised $4.2M · 10 rounds over 13 yrs (0.8/yr) Talent: 1 named leader on record rank vs industry peers · Fliar Intelligence Index 6/100 | $4M | 67 mo ago | — | 2013 | — | — | 2 patents LED lighting control electronics and circuitry | — |
| 39 | Helio Home Provider of home electrification solutions and services. 19Talent top 38%Global bottom 37%Market bottom 34%Funding bottom 34% All 4 signals ▾Talenttop 38% Globalbottom 37% Marketbottom 34% Fundingbottom 34% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Global: Investors from 1 country beyond United States rank vs industry peers · Fliar Intelligence Index 19/100 | $4M | 52 mo ago | 18 | 2021 | — | — | — | — |
| 40 | Terzo Power Systems Provider of smart hydraulic solutions for the fluid power systems 14Innovation top 40%Product top 46%Funding bottom 41%Tech bottom 32% All 6 signals ▾Innovationtop 40% Producttop 46% Fundingbottom 41% Techbottom 32% Globalbottom 29% Marketbottom 22% Innovation: 2 product lines Product: 2 distinct product lines · Company stage: Series A rank vs industry peers · Fliar Intelligence Index 14/100 | $4M | 98 mo ago | — | 2014 | WordPressMySQLPHP+15 | — | — | — |
| 41 | Powder Watts Manufacturer of heat cables and smart roof 14Funding bottom 48%Talent bottom 45%Product bottom 40%Global bottom 29% All 5 signals ▾Fundingbottom 48% Talentbottom 45% Productbottom 40% Globalbottom 29% Marketbottom 26% Funding: Raised $2.5M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) Talent: 1 named leader on record rank vs industry peers · Fliar Intelligence Index 14/100 | $2M | 35 mo ago | 12 | 2019 | — | — | — | — |
| 42 | Light & Motion Manufacturer and brand of LED lights 32Product top 18%Patents top 39%Innovation top 45%Moat top 45% All 9 signals ▾Producttop 18% Patentstop 39% Innovationtop 45% Moattop 45% Techbottom 45% Marketbottom 42% Growthbottom 42% Globalbottom 35% Fundingbottom 27% Product: 5 distinct product lines Patents: 54 patents matched (strict assignee match) · 5 filings since 2022 vs 29 in 2017-21 rank vs industry peers · Fliar Intelligence Index 32/100 | $2M | 60 mo ago | 29 | 1989 | — | — | 54 patents Patents concentrated in transport & manufacturing processes | — |
| 43 | Capstone Companies Designer & manufacturer of LED lighting products 5Product top 35%Funding top 48%Global bottom 30%Growth bottom 27% All 7 signals ▾Producttop 35% Fundingtop 48% Globalbottom 30% Growthbottom 27% Newsbottom 21% Fin. healthbottom 19% Marketbottom 15% Product: 0 product launch events in 12 mo · Company stage: Public Funding: Raised $2.2M across 3 rounds · 3 rounds over 9 yrs (0.3/yr) rank vs industry peers · Fliar Intelligence Index 5/100 | $2M | 17 mo ago | 8 | 1997 | — | — | — | — |
| 44 | Designconceptslv Provider of international education opportunities for students 62Growth top 30%Funding bottom 39%Global bottom 36% All 3 signals ▾Growthtop 30% Fundingbottom 39% Globalbottom 36% Growth: Headcount 88 → 114 (+30%) across vintages Funding: Raised $1.8M across 2 rounds · 2 rounds over 8 yrs (0.2/yr) rank vs industry peers · Fliar Intelligence Index 62/100 | $2M | 69 mo ago | 114 | 2005 | — | — | — | — |
| 45 | SLS Provider of lightning monitoring, protection, and testing products & services 27Patents top 42%Tech top 44%Growth top 45%Innovation top 49% All 9 signals ▾Patentstop 42% Techtop 44% Growthtop 45% Innovationtop 49% Moatbottom 49% Productbottom 40% Fundingbottom 30% Globalbottom 29% Marketbottom 19% Patents: 7 patents matched (strict assignee match) · 3 filings since 2022 vs 0 in 2017-21 Tech: 35 technologies across 4/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 27/100 | $2M | 39 mo ago | 11 | 2014 | WordPressMySQLPHP+25 | — | 7 patents Patents concentrated in computing, sensing & instrumentation | — |
| 46 | York Electric Provider of electric power and related services to members. 37Growth top 35%Market bottom 43%Funding bottom 36%Tech bottom 36% All 7 signals ▾Growthtop 35% Marketbottom 43% Fundingbottom 36% Techbottom 36% Productbottom 36% Customersbottom 33% Globalbottom 29% Growth: Fresh capital in last 24 mo Market: 40 employees (top 41% of Energy Efficiency) · Top-5,000,000 web property rank vs industry peers · Fliar Intelligence Index 37/100 | $1M | 23 mo ago | 40 | 2000 | WordPressMySQLPHP+19 | — | — | 1 partnership |
| 47 | Liatris Provider of data science and analytics services to pharmaceutical, biotech, chemical, cosmetic companies 4News top 44%Funding bottom 49%Moat bottom 42%Patents bottom 36% All 7 signals ▾Newstop 44% Fundingbottom 49% Moatbottom 42% Patentsbottom 36% Globalbottom 31% Marketbottom 18% Innovationbottom 4% News: 2 BI events in 12 mo (of 3 tracked, 2 types) · Top themes: Hiring Funding: Raised $1.0M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 4/100 | $1M | 17 mo ago | 9 | 2020 | — | — | 2 patents Thermal insulation materials using polyisocyanurate aerogel composites for building construction | — |
| 48 | Adatech Manufacturer of advanced energy storage products for defense applications. 22Market top 44%Funding bottom 43%Global bottom 36%Growth bottom 25% All 5 signals ▾Markettop 44% Fundingbottom 43% Globalbottom 36% Growthbottom 25% Techbottom 25% Market: 139 employees (top 17% of Energy Efficiency) · Top-50,000,000 web property Funding: Raised $725k across 4 rounds · 4 rounds over 10 yrs (0.4/yr) rank vs industry peers · Fliar Intelligence Index 22/100 | $725K | 27 mo ago | 139 | 1985 | Squarespace CommerceSquarespaceYUI+6 | — | — | — |
| 49 | Darcy Solutions Developer of smart ground source heat pumps 48Growth top 28%Patents top 32%Innovation top 33%Moat top 45% All 9 signals ▾Growthtop 28% Patentstop 32% Innovationtop 33% Moattop 45% Techtop 48% Talentbottom 45% Fundingbottom 41% Globalbottom 35% Marketbottom 24% Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo Patents: 21 patents matched (strict assignee match) · 21 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 48/100 | $525K | 21 mo ago | 12 | 2018 | WordPressApple iCloud MailMicrosoft 365+26 | — | 21 patents Groundwater-based geothermal heat exchange systems and pitless adapter technologies. | 1 partnership · 2 awards |
Top 12 Energy Efficiency companies in United States
#1
Seed · Dallas, Texas · founded 2022 · 14 employees$200Mraised▾
Seed · Dallas, Texas · founded 2022 · 14 employees
Provider of renewable power generation services
Fliar Intelligence Index™ 19how this company ranks against its industry peers
Funding
top 35%Talent
bottom 49%Tech
bottom 43%News
bottom 40%Global
bottom 29%Market
bottom 19%Funding: Raised $200M across 1 rounds · 1 rounds over 4 yrs (0.2/yr) · Last round Conventional Debt (Apr 2026)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Tech: 18 technologies across 3/8 capability areas · Cloud: Cloudflare · Security: Cloudflare Bot Management, Hsts
Audience (LinkedIn): 3k LinkedIn followers — 2.1% of this cohort's audience
Activity (LinkedIn): 1 partnerships (incl. Diamondback Energy and Granite Ridge Resources) announced in 12 mo
Funding rounds
- Apr 2026Conventional Debt$200M
- Aug 2022Seed—
Founders & team
Investors
Grey Rock, Eldridge Industries
#2
Funding Raised · United States · founded 2005 · 47 employees$10.3Mraised▾
Funding Raised · United States · founded 2005 · 47 employees
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Fliar Intelligence Index™ 62how this company ranks against its industry peers
Innovation
top 20%Funding
top 32%Product
top 32%Talent
bottom 49%Global
bottom 33%Tech
bottom 22%Innovation: 8 product lines
Funding: Raised $10.3M across 12 rounds · 12 rounds over 19 yrs (0.6/yr) · Last round Conventional Debt (Dec 2025)
Product: 8 distinct product lines · Company stage: Conventional Debt
Audience (LinkedIn): 3k LinkedIn followers — 2.0% of this cohort's audience
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Senior Director, Quality, Program & Certification Manager
Funding rounds
- Dec 2025Conventional Debt$2M
- Jun 2017Grant (prize money)$149.9K
- Jul 2011Grant (prize money)$300K
- Jan 2011Grant (prize money)$180K
Founders & team
Investors
OSTI, National Science Foundation, Hum Capital
Tech stack
DrupalPhpYoutubeApache Http ServerGoogle Tag ManagerGoogle Analytics
#3
Series B · Bellville, Texas · founded 2024$20.4Mraised▾
Series B · Bellville, Texas · founded 2024
Developer of long-duration energy storage systems for data center applications. The company provides systems designed for reliability and tailored to meet power demands. Its in-series system turns power infrastructure into a controllable asset. The technology smooths volatile loads, filters harmonic distortion, and partners with generation assets. The systems are built to solve challenges of managing power strategically.
Fliar Intelligence Index™ 27how this company ranks against its industry peers
Talent
top 28%Funding
top 41%Tech
bottom 37%Global
bottom 34%Market
bottom 31%Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Funding: Raised $20.4M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Series B (Sep 2025)
Tech: 21 technologies across 2/8 capability areas · Devops: Nginx
Audience (LinkedIn): 3k LinkedIn followers
Funding rounds
- Sep 2025Series B$20.4M
Founders & team
Tech stack
AosAstraGoogle AnalyticsGoogle Font ApiGoogle Tag ManagerJquery
#4
Series A · Palo Alto, California · founded 2008 · 12 employees$34Mraised▾
Series A · Palo Alto, California · founded 2008 · 12 employees
Provider of geothermal energy production services
Fliar Intelligence Index™ 57how this company ranks against its industry peers
Innovation
top 19%Patents
top 23%Funding
top 41%Moat
top 45%Global
bottom 43%News
bottom 42%Innovation: 77 patents (top 28% of patent-holders) · 77 filings since 2022 vs 0 in 2017-21
Patents: 77 patents matched (strict assignee match) · 77 filings since 2022 vs 0 in 2017-21 · Latest publication 2026
Funding: Raised $34.0M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) · Last round Series A (Mar 2025)
Audience (LinkedIn): 8k LinkedIn followers — 5.1% of this cohort's audience
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Manager, Land Development, Strategy Associate
Activity (LinkedIn): 2 partnerships (incl. Breakfast Hughes) announced in 12 mo
Funding rounds
- Mar 2025Series A$13M
- Jan 2024Series A$20M
- Mar 2023Series A$14M
Investors
BlueScopeX, Thin Line Capital, Valo Ventures, VoLo Earth Ventures, B Current, MIH Capital Management
#5
Uplight 🦄Acquired · Boulder, Colorado · founded 2019 · 496 employees$30Mraised▾
Uplight 🦄
Acquired · Boulder, Colorado · founded 2019 · 496 employees
AI and SaaS-driven solutions for energy monitoring in residential and commercial buildings. It provides energy management systems designed to offer control, demand response, electric vehicle charging, and distributed generation support.
Fliar Intelligence Index™ 80how this company ranks against its industry peers
News
top 22%Tech
top 24%Growth
top 25%Moat
top 31%Funding
top 34%Patents
top 34%News: 8 BI events in 12 mo (of 17 tracked, 5 types) · 2 high-value events (IPO/M&A/funding/contracts) in 12 mo · Top themes: Leadership, M&A
Tech: 45 technologies across 6/8 capability areas · Cloud: Amazon Web Services, Cloudflare · Devops: Nginx
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 52k LinkedIn followers — 35.3% of this cohort's audience
Activity (LinkedIn): 1 product launches · 1 awards announced in 12 mo
Funding rounds
- Mar 2025Series A$30M
- Mar 2021Seed—
Founders & team
Investors
Schneider Electric, AES, Huck Capital, Coatue, Rubicon Technology Partners
Tech stack
AlgoliaAmazon Web ServicesAngularCloudflareCloudflare Bot ManagementCrazy Egg
#6
Acquired · Jackson, Mississippi · founded 2017$12Mraised▾
Acquired · Jackson, Mississippi · founded 2017
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Fliar Intelligence Index™ 53how this company ranks against its industry peers
Patents
top 31%Product
top 32%Innovation
top 37%Funding
top 38%Global
top 49%Tech
bottom 23%Patents: 46 patents matched (strict assignee match) · 15 filings since 2022 vs 13 in 2017-21 · Latest publication 2025
Product: 3 distinct product lines · Company stage: Acquired
Innovation: 46 patents (top 33% of patent-holders) · 15 filings since 2022 vs 13 in 2017-21 · 3 product lines
Funding rounds
- Jun 2025Grant (prize money)$4M
- Apr 2025Grant (prize money)$4M
- Jan 2025Grant (prize money)$4M
Investors
OSTI
Tech stack
Apache Http ServerApple Icloud MailContact Form 7Font AwesomeGodaddyGoogle Font Api
#7
Seed · Akron, Ohio · founded 2007 · 21 employees$5.3Mraised▾
Seed · Akron, Ohio · founded 2007 · 21 employees
Developer of waste heat recovery and long-duration energy storage systems. It offers commercially available waste heat recovery systems using supercritical carbon dioxide (sCO2) technology, enabling compact and efficient power generation. The company also develops pumped thermal energy storage (PTES) solutions for utility-scale long-duration energy storage, addressing challenges in grid stability and renewable energy integration. Its sCO2-based power cycles are designed for various applications, including industrial heat, power generation in oil and gas, solar, and marine sectors.
Fliar Intelligence Index™ 37how this company ranks against its industry peers
Patents
top 37%Innovation
top 41%Funding
top 45%Talent
bottom 49%Tech
bottom 45%Global
bottom 41%Patents: 190 patents matched (strict assignee match) · 9 filings since 2022 vs 67 in 2017-21 · Latest publication 2023
Innovation: 190 patents (top 11% of patent-holders) · 9 filings since 2022 vs 67 in 2017-21
Funding: Raised $5.3M across 4 rounds · 4 rounds over 16 yrs (0.2/yr) · Last round Grant (prize money) (May 2025)
Audience (LinkedIn): 2k LinkedIn followers
Activity (LinkedIn): 1 partnerships · 1 awards (incl. Greater Cleveland Partnership) announced in 12 mo
Funding rounds
- May 2025Grant (prize money)$1.2M
- May 2025Grant (prize money)$3M
- Feb 2018Seed—
- Jul 2017Grant (prize money)$1M
Founders & team
Investors
DOE, Jumpstart Ventures, OSTI, Plug and Play Tech Center
Tech stack
CloudflareCookieyesCore-JsGoogle AnalyticsGoogle Font ApiGoogle Hosted Libraries
#8
Series A · Sunnyvale, California · founded 1902 · 16 employees$12.5Mraised▾
Series A · Sunnyvale, California · founded 1902 · 16 employees
Provider of electrochemical-based air conditioners. Its products use a combination of liquid desiccant and vapor compression technology to provide superior comfort and performance at a lower cost.
Fliar Intelligence Index™ 19how this company ranks against its industry peers
Funding
top 44%Talent
bottom 49%Global
bottom 37%Market
bottom 31%News
bottom 21%Funding: Raised $12.5M · 2 rounds over 3 yrs (0.7/yr) · Last round Series A (Aug 2024)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Global: Investors from 1 country beyond United States
Audience (LinkedIn): 5k LinkedIn followers — 3.3% of this cohort's audience
Hiring (LinkedIn): 4 hiring posts in 12 mo (public) · momentum +4 · hiring: Regional Sales Manager, Mechanical Design Engineer
Activity (LinkedIn): 1 product launches announced in 12 mo
Founders & team
Investors
DOE, At One Ventures, Fifth Wall, Xerox Ventures, Myriad Venture Partners, Starshot Capital
#9
Public · Deerfield Beach, Florida · founded 1997 · 8 employees$2.2Mraised▾
Public · Deerfield Beach, Florida · founded 1997 · 8 employees
Designer & manufacturer of LED lighting products
Fliar Intelligence Index™ 5how this company ranks against its industry peers
Product
top 35%Funding
top 48%Global
bottom 30%Growth
bottom 27%News
bottom 21%Fin. health
bottom 19%Product: 0 product launch events in 12 mo · Company stage: Public
Funding: Raised $2.2M across 3 rounds · 3 rounds over 9 yrs (0.3/yr) · Last round Post IPO (Dec 2024)
Global: Single-market focus (United States)
Funding rounds
- Dec 2024Post IPO$494.9K
- Apr 2021Post IPO$1.5M
- Sep 2017Post IPO$240.9K
#10
Seed · San Francisco, California · founded 2020 · 5 employees$15.5Mraised▾
Seed · San Francisco, California · founded 2020 · 5 employees
Developer of hydrogen storage and delivery solutions for various industries. The company provides solutions for power generation in locations lacking grid access. These solutions serve sectors including data centers, construction, ports, and airports. The company focuses on efficient, low-carbon fuels to deliver energy where and when needed. It also develops hydrogen densification equipment and storage systems.
Fliar Intelligence Index™ 19how this company ranks against its industry peers
Innovation
top 31%Patents
top 33%Funding
top 37%Partners
top 40%Moat
top 45%News
top 48%Innovation: 25 patents (top 46% of patent-holders) · 25 filings since 2022 vs 0 in 2017-21
Patents: 25 patents matched (strict assignee match) · 25 filings since 2022 vs 0 in 2017-21 · Latest publication 2026
Funding: Raised $15.5M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) · Last round Seed (Apr 2024)
Funding rounds
- Apr 2024Seed—
- Jun 2022Seed—
- 2021Seed—
Founders & team
Investors
Trucks Venture Capital, Collab Fund, The Climate Pledge, United Airlines, Newlab, Climate Capital
#11
Seed · Bethesda, Maryland · founded 2020 · 9 employees$1Mraised▾
Seed · Bethesda, Maryland · founded 2020 · 9 employees
Provider of data science and analytics services to pharmaceutical, biotech, chemical, cosmetic companies
Fliar Intelligence Index™ 4how this company ranks against its industry peers
News
top 44%Funding
bottom 49%Moat
bottom 42%Patents
bottom 36%Global
bottom 31%Market
bottom 18%News: 2 BI events in 12 mo (of 3 tracked, 2 types) · Top themes: Hiring
Funding: Raised $1.0M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) · Last round Grant (prize money) (Jan 2025)
Moat: Editorial + unicorn rating 1/10 · IP moat: 2 patents
Audience (LinkedIn): 504 LinkedIn followers
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- Jan 2025Grant (prize money)$808.9K
- Jul 2021Seed$1M
- Jun 2020Grant (prize money)$225K
Investors
USM, Old Line Capital Partners, National Science Foundation, OSTI, America’s Seed Fund
#12
Series B · Grand Prairie, Texas · founded 2021 · 10 employees$30Mraised▾
Series B · Grand Prairie, Texas · founded 2021 · 10 employees
Developer of clean ammonia project focused on decarbonization of energy. The project aims to provide affordable clean ammonia to support global decarbonization efforts. It prioritizes infrastructure, including pipeline agreements for carbon dioxide transportation. The project will generate its own power from hydrogen rich fuel.
Fliar Intelligence Index™ 8how this company ranks against its industry peers
Funding
top 35%Talent
top 38%News
bottom 35%Tech
bottom 34%Global
bottom 25%Market
bottom 22%Funding: Raised $30.0M across 1 rounds · 1 rounds over 3 yrs (0.3/yr) · Last round Series B (May 2023)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
News: 3 BI events in 12 mo (of 13 tracked, 3 types) · -62% YoY · Top themes: Lawsuit
Funding rounds
- May 2023Series B$30M
Founders & team
Funding & investor landscape
$1.3Btotal disclosed funding
103companies funded
248disclosed rounds
1rounds last 90 days
Most active investors
New Enterprise Associates3 rounds
Notable founders
Matthew Herpich
Managing Director & CEO · Conduit Power
Engin Arik
Chairman of the Board · Luminit Light Shaping Diffusers
Daniel Parrella
Co-Founder & VP of Manufacturing · TerraFlow Energy
Ian Rock
Co-Founder & CTO · TerraFlow Energy
Luis D'Acosta
CEO · Uplight
Phil Brennan
Founder and CEO · Echogen Power Systems
Phil Farese
CEO · Mojave
David Jaramillo
Co-founder & CTO · Verne
Simon Zhang
Chief Executive Officer · Clean Hydrogen Works
Paul Amevor
Owner · Modern Energy
Grace Stewart
Owner · Modern Energy
Brian Larson
Co-Founder & CEO · Darcy Solutions
Prism market signals · United States · country-scoped Prism corpus, 1,561,715 docs
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency 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 breakthroughs are surging — U.S. papers soared from 1 to 50, with emissivity and radiative transfer newly prominent.
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 — U.S. building-sector papers grew 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 risk papers rose from 40 to 47 across U.S. institutions.
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
- FORD Global TECH108
- Haier US Appliance Solutions108
- Lennox IND79
Common questions
How many Energy Efficiency companies are there in United States?
Radar tracks 953 indexable Energy Efficiency companies headquartered in United States that meet our profile-completeness bar.
What is the total funding raised by Energy Efficiency companies in United States?
The Energy Efficiency companies in United States on this list have raised a combined $1.3B in disclosed equity funding across 103 funded companies.
Which is the highest-funded Energy Efficiency company in United States?
Conduit Power is the highest-funded Energy Efficiency company in United States, with $200M in disclosed equity funding.
How many Energy Efficiency companies in United States are funded?
103 of the 953 Energy Efficiency companies in United States on this list have disclosed at least one equity funding round.
How many Energy Efficiency unicorns are there in United States?
1 Energy Efficiency company in United States on this list is valued at $1B or more.
Who are the top investors in United States Energy Efficiency companies?
The most active investors in United States Energy Efficiency companies on this list include OSTI, National Science Foundation, DOE, CalSEED, Greentown Labs.
Riya SenguptaFinancials
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.