Radar · Renewable Energy Tech in California
Best Renewable Energy Tech Companies in California, United States
The 264 best Renewable Energy Tech companies in California, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Solyndra.
By Riya SenguptaFinancials
264companies tracked
$8.5Bdisclosed funding
3unicorns
122have raised
Ranked: Best Renewable Energy Tech companies in California
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Solyndra 🦄 Provider of solar panels, solar panel kits, and related components | $845M | 101 mo ago | 168 | 2005 | — | WordPressMySQLPHP+18 | 158 patents Non‑planar, cylindrical photovoltaic modules with filler layers and volume‑compensation integration. | — |
| 2 | Xpansiv 🦄 Offsets and renewable energy marketplace | $712M | 41 mo ago | 277 | 2016 | Joe Madden CEO | WordPressApple iCloud MailMicrosoft 365+28 | — | 3 partnerships |
| 3 | Aurora Solar 🦄 Provider of software for solar and storage system design and sales | $537M | 51 mo ago | 135 135 → 302 (+124%) | 2013 | Christopher Hopper Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+37 | 33 patents Automated 3D building modeling and estimation using computer vision and AI algorithms. | — |
| 4 | Mainspring Energy Developer of onsite linear power generators 82Patents top 16%Funding top 18%Innovation top 21%Moat top 24% All 10 signals ▾Patentstop 16% Fundingtop 18% Innovationtop 21% Moattop 24% Talenttop 28% Growthtop 32% Techtop 36% Markettop 45% Globalbottom 47% Newsbottom 18% Patents: 166 patents matched (strict assignee match) · 113 filings since 2022 vs 52 in 2017-21 Funding: Raised $518M across 5 rounds · 5 rounds over 9 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 82/100 | $518M | 14 mo ago | 114 | 2010 | Matt Svrcek Co-Founder & CTO | Craft CMSBugHerdApple iCloud Mail+20 | 166 patents Patents concentrated in mechanical & energy engineering | — |
| 5 | MiaSole CIGS PV module manufacturer | $500M | 171 mo ago | 363 | 2001 | — | WordPressMySQLPHP+13 | 230 patents High‑efficiency CIGS thin‑film solar cells and integrated mounting/interconnect hardware | — |
| 6 | Fervo Energy Developer of next-generation geothermal projects delivering carbon-free energy 57Funding top 8%Talent top 34%News top 39%Partners top 45% All 9 signals ▾Fundingtop 8% Talenttop 34% Newstop 39% Partnerstop 45% Growthtop 47% Techtop 48% Moattop 48% Marketbottom 44% Globalbottom 39% Funding: Raised $420M across 12 rounds · 12 rounds over 5 yrs (2.4/yr) Talent: Analyst team rating 4/5 · 2 named leaders on record rank vs industry peers · Fliar Intelligence Index 57/100 | $420M | 3 mo ago | 49 | 2017 | Jack Norbeck Co-Founder and CTO | WordPressApple iCloud MailMicrosoft 365+25 | — | 1 launch · 3 partnerships |
| 7 | Sapphire Energy Business energy price comparison website helping UK businesses save on energy bills | $390M | 126 mo ago | 1 | 2006 | — | — | 269 patents Algal biofuel production and photosynthetic synthesis of high‑value chemicals. | — |
| 8 | OptiSolar Technologies Manufactured thin film solar modules | $334M | 207 mo ago | 57 | 2005 | Randy Goldstein Co-Founder & CEO | — | 34 patents Depositing barrier and transparent conductive thin-film coatings for solar photovoltaic modules | — |
| 9 | Aemetis Manufacturer of renewable fuels and renewable chemicals | $207M | 66 mo ago | 233 | 2006 | — | WordPressMySQLPHP+21 | 7 patents Renewable biofuel and bioproduct synthesis: biodiesel, isoprene, and decarboxylase enzymes | — |
| 10 | Saildrone Developer of autonomous unmanned surface vehicle 55Funding top 23%Moat top 31%Growth top 35%Tech top 42% All 10 signals ▾Fundingtop 23% Moattop 31% Growthtop 35% Techtop 42% Markettop 47% Talentbottom 49% Patentsbottom 45% Globalbottom 43% Innovationbottom 37% Newsbottom 22% Funding: Raised $190M across 4 rounds · 4 rounds over 10 yrs (0.4/yr) Moat: Editorial + unicorn rating 8/10 · IP moat: 18 patents rank vs industry peers · Fliar Intelligence Index 55/100 | $190M | 13 mo ago | 250 | 2012 | Richard Jenkins Founder & CEO | WebflowSalesforceGSAP+17 | 18 patents Autonomous unmanned surface vehicles with flexible sensor mounts and square-wing sail propulsion. | 2 job openings · 1 launch |
| 11 | Caban Cloud based energy storage solutions 48Funding top 24%Moat top 36%Tech top 37%Talent bottom 49% All 7 signals ▾Fundingtop 24% Moattop 36% Techtop 37% Talentbottom 49% Growthbottom 48% Marketbottom 45% Globalbottom 32% Funding: Raised $176M across 4 rounds · 4 rounds over 7 yrs (0.6/yr) Moat: Editorial + unicorn rating 6/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 48/100 | $176M | 15 mo ago | 54 | 2016 | Alexandra Castillo Founder and CEO | WebflowVimeoHubSpot+15 | — | — |
| 12 | Renew Financial Online platform for renewable energy financing | $125M | 31 mo ago | 356 356 → 199 (-44%) | 2008 | Mark Floyd Chief Executive Officer | WordPressApple iCloud MailMySQL+25 | — | — |
| 13 | BEEWISE Saving bees with AI and robotics to protect the global food supply 48Funding top 20%Moat top 28%Growth top 35%AI top 35% All 10 signals ▾Fundingtop 20% Moattop 28% Growthtop 35% AItop 35% Producttop 36% Talentbottom 49% Techbottom 44% Globalbottom 39% Marketbottom 23% Newsbottom 17% Funding: Raised $120M across 8 rounds · 8 rounds over 7 yrs (1.1/yr) Moat: Editorial + unicorn rating 8/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 48/100 | $120M | 12 mo ago | 6 | 2018 | Saar Safra Co-Founder & CEO | HubSpot CMS HubSalesforceAmazon Web Services+17 | — | — |
| 14 | Zeitview Provider of drone-based inspection software platform 76Funding top 18%Tech top 27%AI top 30%Moat top 31% All 9 signals ▾Fundingtop 18% Techtop 27% AItop 30% Moattop 31% Markettop 42% Growthtop 45% Talentbottom 49% Globalbottom 39% Newsbottom 32% Funding: Raised $114M across 8 rounds · 8 rounds over 11 yrs (0.7/yr) Tech: 44 technologies across 5/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 76/100 | $114M | 15 mo ago | 194 | 2014 | Daniel Burton Co-Founder & CEO | Cart FunctionalitySquarespace CommerceSquarespace+31 | — | — |
| 15 | Moxion Power Provider of mobile and stationary energy storage systems and related services | $112M | 36 mo ago | 344 | 2020 | Alex Smith Co-Founder and CTO | — | — | — |
| 16 | Built Robotics Develops automated dozer robots for the construction industry | $112M | 50 mo ago | 25 25 → 41 (+64%) | 2015 | Andrew Liang Co-Founder | Craft CMSApple iCloud MailGoogle Workspace+16 | 142 patents Autonomous earth‑moving and pile‑driving equipment with AI navigation and control | 2 partnerships |
| 17 | Heliogen Producer of hydrogen and syngas using sunlight | $111M | 60 mo ago | 144 | 2013 | Christie Obiaya Chief Executive Officer | WordPressApple iCloud MailMicrosoft 365+25 | 63 patents Patents concentrated in electrical & electronics | — |
| 18 | Equilibrium Energy Provider of software solutions for portfolio management 60Funding top 22%Growth top 32%Talent top 38%Moat bottom 48% All 7 signals ▾Fundingtop 22% Growthtop 32% Talenttop 38% Moatbottom 48% Globalbottom 45% Marketbottom 42% Newsbottom 21% Funding: Raised $102M across 5 rounds · 5 rounds over 5 yrs (1.0/yr) Growth: Headcount 18 → 43 (+139%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 60/100 | $102M | 15 mo ago | 43 43 → 97 (+126%) | 2021 | Kevin Clifford Co-Founder | — | — | — |
| 19 | Aptera Motors Developer of solar electric vehicles designed for efficient energy use | $83M | 18 mo ago | 91 | 2005 | Jim Chyou Asia Pacific Ceo | WordPress Site EditorWordPressApple iCloud Mail+39 | 86 patents Solar-integrated vehicle structures, UI displays, and laminated solar panel manufacturing for EVs | — |
| 20 | Terabase Developer of a web-based solar power plant optimization platform 57Funding top 22%Talent top 28%Moat top 39%Market top 46% All 9 signals ▾Fundingtop 22% Talenttop 28% Moattop 39% Markettop 46% Producttop 46% Techtop 47% Growthbottom 47% Globalbottom 38% Newsbottom 21% Funding: Raised $77.0M across 5 rounds · 5 rounds over 7 yrs (0.7/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 57/100 | $77M | 15 mo ago | 104 | 2019 | Pierre Gousseland SVP of Product | WordPressApple iCloud MailMicrosoft 365+26 | — | 1 launch · 1 award |
| 21 | Sunverge Developer of smart energy storage and energy management systems | $75M | 36 mo ago | 33 | 2009 | Dean Sanders Co-Founder & CTO | — | — | — |
| 22 | Infinium Developer of technology transforming waste emissions into sustainable products | $69M | 17 mo ago | 58 | 2020 | — | Cart FunctionalitySquarespace CommerceSquarespace+23 | 254 patents Patents concentrated in chemistry & materials | 2 partnerships · 1 award |
| 23 | Ambient Photonics Provider of solar cells for connected devices | $61M | 33 mo ago | 11 11 → 13 (+18%) | 2019 | Bates Marshall Co-Founder & CEO | WordPressMySQLPHP+27 | 61 patents Copper‑redox dye‑sensitized solar cell materials and related organic dye chemistries | — |
| 24 | Aether Fuels Developer of technology converting waste carbon into sustainable liquid fuels 40Funding top 23%Growth top 35%News top 46%Moat top 48% All 9 signals ▾Fundingtop 23% Growthtop 35% Newstop 46% Moattop 48% Talentbottom 49% Globalbottom 39% Marketbottom 35% Partnersbottom 35% Techbottom 32% Funding: Raised $45.4M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 40/100 | $45M | 5 mo ago | — | 2022 | Conor Madigan Founder and CEO | Craft CMSApple iCloud MailMicrosoft 365+10 | — | 1 launch · 1 award |
| 25 | Reflect Orbital Space-based solar power generation solutions | $35M | 13 mo ago | 4 | 2021 | Tristan Semmelhack Co-Founder | WebflowApple iCloud MailGoogle Workspace+16 | — | 1 job opening |
| 26 | Halcyon Provider of AI-assisted search and information platform for energy professionals 45Funding top 25%Talent top 38%Patents top 39%Innovation top 42% All 7 signals ▾Fundingtop 25% Talenttop 38% Patentstop 39% Innovationtop 42% Techbottom 46% Marketbottom 37% Globalbottom 35% Funding: Raised $31.8M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $32M | 3 mo ago | — | 2021 | Bruce F Founder & CEO | HubSpot CMS Hubcore-jsPreact+15 | 13 patents High‑pressure lipid extraction, infusion and bonding equipment for oil processing | — |
| 27 | Merlin Solar Manufacturers of solar modules 55Product top 26%Funding top 27%Tech top 27%Growth top 35% All 10 signals ▾Producttop 26% Fundingtop 27% Techtop 27% Growthtop 35% Patentstop 43% Moattop 43% Innovationtop 50% Talentbottom 49% Globalbottom 40% Marketbottom 38% Product: 11 distinct product lines · Company stage: Acquired Funding: Raised $31.0M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $31M | 6 mo ago | 62 | 2016 | Venkatesan Murali Founder | Wix eCommerceWixSentry+13 | 79 patents Metallic interconnects and surface treatments for photovoltaic module manufacturing | — |
| 28 | Noon Provider of solutions for flow batteries | $31M | 31 mo ago | 7 | 2018 | Christopher Graves Founder & CEO | WixSentryApple iCloud Mail+13 | — | 2 partnerships · 1 award |
| 29 | Next Energy Technologies Manufacturer of coatings for solar power generation | $29M | 28 mo ago | 26 26 → 28 (+8%) | 2010 | — | Wix eCommerceWixSentry+19 | 87 patents Advanced lithium‑metal and anode‑free battery cell design, manufacturing, and integration. | 2 launchs |
| 30 | Verse Provider of SaaS-based renewable energy management platform | $26M | 25 mo ago | 2 | 2022 | Seyed Madaeni Co-Founder & CEO | WordPressMarkerMySQL+37 | — | 1 partnership |
| 31 | Ivy Energy Cloud-based platform offering bill calculation software solutions for solar energy operators | $18M | 26 mo ago | 38 38 → 50 (+32%) | 2012 | Dover J Founder & CEO | Apple iCloud MailGoogle WorkspaceRadix UI+16 | — | — |
| 32 | Charge Robotics Developer of automated robotic systems for renewable energy construction applications 19Talent top 38%Funding top 40%Tech bottom 44%Global bottom 37% All 5 signals ▾Talenttop 38% Fundingtop 40% Techbottom 44% Globalbottom 37% Marketbottom 20% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $17.1M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 19/100 | $17M | 15 mo ago | 8 | 2021 | Banks Hunter Co-Founder & CEO | Node.jsReactNext.js+6 | — | — |
| 33 | Lumen Energy Provider of solutions to manage PPA 40Funding top 36%Talent top 38%Market bottom 43%Global bottom 36% All 4 signals ▾Fundingtop 36% Talenttop 38% Marketbottom 43% Globalbottom 36% Funding: Raised $16.5M · 3 rounds over 5 yrs (0.6/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 40/100 | $17M | 4 mo ago | 38 | 2019 | Dave Coen Co-Founder | — | — | — |
| 34 | NovaSolix Developer of rectenna-based solar technology for various applications and sectors 32Moat top 25%Funding top 33%Talent top 34%Patents top 41% All 7 signals ▾Moattop 25% Fundingtop 33% Talenttop 34% Patentstop 41% Innovationtop 47% Globalbottom 33% Marketbottom 25% Moat: Editorial + unicorn rating 6/10 · IP moat: 42 patents Funding: Raised $16.1M across 3 rounds · 3 rounds over 6 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 32/100 | $16M | 2 mo ago | 12 | 2015 | Bob Cousins Co-Founder | — | 42 patents Solar-powered antenna arrays and low‑power semi‑reflective display technologies | 3 launchs · 1 partnership |
| 35 | Enact Provider of software solutions for monitoring solar energy usage and production | $15M | 11 mo ago | 47 | 2014 | Manasij Kar Co-Founder & Head of Product | WordPressMySQLPHP+30 | — | — |
| 36 | Tandem PV Developer of a perovskite-based solar cell | $14M | 13 mo ago | 21 | 2017 | Colin Bailie Founder | Wix eCommerceWixSentry+13 | 34 patents Advanced tandem photovoltaic cells with spectral filtering and parameter‑matching for optimized power output | 1 expansion |
| 37 | General Galactic Fuel production solutions from renewable energy sources | $10M | 19 mo ago | — | 2023 | Luke Neise Co-Founder & CTO | Webflow EcommerceWebflowreCAPTCHA+7 | — | 1 job opening · 1 launch · 1 partnership |
| 38 | King Energy Provider of solar energy solutions for multi-tenant commercial properties | $10M | 19 mo ago | 38 | 2002 | Brian Clausen Chief Revenue Officer and Co-Founder | WordPressApple iCloud MailGoogle Workspace+29 | — | — |
| 39 | MicroBio Engineering Developer of microalgae technology and wastewater treatment plants 32Innovation top 20%Funding top 44%Product top 46%Talent bottom 45% All 7 signals ▾Innovationtop 20% Fundingtop 44% Producttop 46% Talentbottom 45% Techbottom 31% Globalbottom 29% Marketbottom 15% Innovation: 6 product lines Funding: Raised $8.7M across 9 rounds · 9 rounds over 10 yrs (0.9/yr) rank vs industry peers · Fliar Intelligence Index 32/100 | $9M | 5 mo ago | 8 | 2005 | John Benemann CEO | Squarespace CommerceSquarespaceStimulus+11 | — | — |
| 40 | Atomic Canyon Developer of AI solutions for nuclear data management and optimization | $7M | 12 mo ago | — | 2024 | Kristian Kielhofner Co-Founder and CTO | Squarespace CommerceCart FunctionalitySquarespace+15 | — | 1 award |
| 41 | Hgen Provider of solutions for hydrogen generation | $7M | 21 mo ago | 4 | 2000 | Molly Yang Co-Founder & CEO | WordPressMySQLPHP+15 | 2 patents Design and manufacturing of flow-field components for alkaline water electrolyzers | — |
| 42 | Rune Energy Computation technology for power plants | $6M | 23 mo ago | — | 2023 | Varun Palivela Co-Founder | — | — | — |
| 43 | Cosmic Robotics Provider of robotics technology services for construction | $4M | 14 mo ago | — | 2023 | James Emerick Co-Founder & CEO | WebflowGSAPLenis+10 | — | 1 partnership |
| 44 | Station A Provider of project developer recommendations using software tools and machine learning | $3M | 12 mo ago | 11 | 2018 | Jeremy Lucas Co-Founder & Head of Engineering | — | 34 patents Identity access management workflow automation and automated spray dispensing systems | 1 job opening |
| 45 | Aether Energy Provider of an AI-powered platform for solar and roofing installers | $3M | 19 mo ago | — | 2023 | Shelby Bons Co-Founder & CTO | SentryNode.jsThree.js+16 | — | — |
| 46 | Tyba Provider of solar power plant management platform | $2M | 16 mo ago | 9 | 2022 | Tyler Nisonoff Co-Founder & CTO | WordPressMySQLPHP+33 | — | — |
| 47 | Gravity Power Provider of pumped hydro energy storage | $2M | 22 mo ago | 6 | 2008 | Thomas Mason CEO | WordPressMySQLPHP+11 | — | — |
| 48 | S²A Modular Provider of real estate & commercial development services | $575K | 6 mo ago | 70 | 2018 | Brian Kuzdas Co-Founder & CEO | WordPressMySQLPHP+23 | 39 patents Optimizing AI compiler pipelines: graph fusion, kernel composition, and caching techniques. | 1 launch · 2 expansions |
| 49 | Verne Provider of rapid electricity deployment solutions for industrial power needs | $500K | 5 mo ago | — | 2020 | David Jaramillo Co-Founder & CTO | — | 25 patents Cryo‑compressed hydrogen storage vessels with thermal management and composite overwrap systems | — |
| 50 | NeoVolta Manufacturer of energy storage systems for residential and commercial applications | $105K | 4 mo ago | 5 | 2017 | Brent Willson CEO | WordPressMySQLZoho+18 | 5 patents Solar photovoltaic energy storage and AC‑grid interfacing power conversion systems | 4 expansions |
Top 12 Renewable Energy Tech companies in California
#1
Public · San Francisco, California · founded 2017 · 49 employees$420.2Mraised▾
Public · San Francisco, California · founded 2017 · 49 employees
Developer of next-generation geothermal projects delivering carbon-free energy. It pioneers a new approach to geothermal energy using technologies like horizontal drilling and distributed fiber optic sensing to unlock geothermal resources. It focuses on making geothermal energy a scalable resource and ensures environmental health and safety in its operations. The company aims to decarbonize challenging parts of the electricity sector through geothermal energy.
Fliar Intelligence Index™ 57how this company ranks against its industry peers
Funding
top 8%Talent
top 34%News
top 39%Partners
top 45%Growth
top 47%Tech
top 48%Funding: Raised $420M across 12 rounds · 12 rounds over 5 yrs (2.4/yr) · Last round Conventional Debt (Mar 2026)
Talent: Analyst team rating 4/5 · 2 named leaders on record · 2 C-suite/founder profiles curated
News: 9 BI events in 12 mo (of 26 tracked, 4 types) · -31% YoY · 8 high-value events (IPO/M&A/funding/contracts) in 12 mo
Audience (LinkedIn): 68k LinkedIn followers — 13.4% of this cohort's audience
Activity (LinkedIn): 1 product launches · 3 partnerships (incl. Enhanced Geothermal Systems Deployment Coalition (EGS DC)) announced in 12 mo
Funding rounds
- Mar 2026Conventional Debt$421M
- Dec 2025Series E$462M
- Jun 2025Conventional Debt$105.5M
- Jun 2025Series D$100M
Founders & team
Investors
Breakthrough Energy, Capricorn, 3x5 Partners, Helmerich & Payne, Elemental, DCVC
Tech stack
Apple Icloud MailCloudflareCloudflare Bot ManagementCore-JsElementorFancybox
#2
Series F · Menlo Park, California · founded 2010 · 114 employees$518Mraised▾
Series F · Menlo Park, California · founded 2010 · 114 employees
Developer of onsite linear power generators. It offers onsite linear power generators that can run on multiple fuels for commercial, industrial, microgrid, and utility customers.
Fliar Intelligence Index™ 82how this company ranks against its industry peers
Patents
top 16%Funding
top 18%Innovation
top 21%Moat
top 24%Talent
top 28%Growth
top 32%Patents: 166 patents matched (strict assignee match) · 113 filings since 2022 vs 52 in 2017-21 · Latest publication 2026
Funding: Raised $518M across 5 rounds · 5 rounds over 9 yrs (0.6/yr) · Last round Series F (Apr 2025)
Innovation: 166 patents (top 13% of patent-holders) · 113 filings since 2022 vs 52 in 2017-21 · Deep-tech classification: Tech Hardware
Audience (LinkedIn): 78k LinkedIn followers — 15.4% of this cohort's audience
Funding rounds
- Apr 2025Series F$258M
- Sep 2022Series E$140M
- May 2022Series E$150M
- Dec 2020Series D$108.1M
Founders & team
Investors
Chevron, Princeville Capital, Standard Industries, Khosla Ventures, American Electric Power, ClearSky Data
Tech stack
Apple Icloud MailBugherdBunnyCloudflareCloudflare Bot ManagementCraft Cms
#3
Series A · San Diego, California · founded 2021$31.8Mraised▾
Series A · San Diego, California · founded 2021
Provider of AI-assisted search and information platform for energy professionals. The platform helps users discover new sources and understand shifting market dynamics. It enables users to answer complex questions related to the energy transition. The platform offers dynamically updated datasets collated from authoritative sources. It also provides alerts and search functionalities for energy dockets, documents, and filings.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Funding
top 25%Talent
top 38%Patents
top 39%Innovation
top 42%Tech
bottom 46%Market
bottom 37%Funding: Raised $31.8M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) · Last round Series A (Feb 2026)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Patents: 13 patents matched (strict assignee match) · 7 filings since 2022 vs 3 in 2017-21 · Latest publication 2024
Funding rounds
- Feb 2026Series A$21M
- Apr 2024Seed$10.8M
Founders & team
Investors
Obvious Ventures, Congruent Ventures, Overture, Energize Capital, Sabanc Climate Tech, Zero Infinity Partners
Tech stack
CdnjsCloudflareCloudflare Bot ManagementCore-JsGoogle AnalyticsGoogle Font Api
#4
Series A · San Francisco, California · founded 2022$45.4Mraised▾
Series A · San Francisco, California · founded 2022
Developer of technology converting waste carbon into sustainable liquid fuels. The company’s technology economically converts waste carbon into liquid fuels. It enables industries to achieve net zero goals through carbon conversion efficiency. The technology converts carbon from multiple sources without requiring extra steps or equipment.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
Funding
top 23%Growth
top 35%News
top 46%Moat
top 48%Talent
bottom 49%Global
bottom 39%Funding: Raised $45.4M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) · Last round Series A (Jan 2026)
Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo
News: 4 BI events in 12 mo (of 12 tracked, 4 types) · +0% YoY · Top themes: Contracts, Funding, Incorporation
Audience (LinkedIn): 8k LinkedIn followers
Activity (LinkedIn): 1 product launches · 1 awards announced in 12 mo
Funding rounds
- Jan 2026Series A$15M
- Mar 2025Series A—
- Jun 2024Series A$36.9M
- Dec 2023Seed$8.5M
Founders & team
Investors
JetBlue Technology Ventures, TechEnergy Ventures, Doral Energy Group, Foothill Ventures, Xora Innovation, AP Ventures
Tech stack
Apple Icloud MailBunnyCloudflareCraft CmsGodaddyHsts
#5
Series C · Newark, California · founded 2015 · 12 employees$16.1Mraised▾
Series C · Newark, California · founded 2015 · 12 employees
Developer of rectenna-based solar technology for various applications and sectors. The technology aims to improve efficiency and lower the cost of solar energy. It focuses on harvesting the full solar spectrum with nanoscale antenna arrays. These arrays translate solar radiation directly into electrical work output. The technology targets sectors like AI, data centers, electric vehicles, aerospace, and electronics.
Fliar Intelligence Index™ 32how this company ranks against its industry peers
Moat
top 25%Funding
top 33%Talent
top 34%Patents
top 41%Innovation
top 47%Global
bottom 33%Moat: Editorial + unicorn rating 6/10 · IP moat: 42 patents
Funding: Raised $16.1M across 3 rounds · 3 rounds over 6 yrs (0.5/yr) · Last round Series C (Apr 2026)
Talent: Analyst team rating 4/5 · 2 named leaders on record · 2 C-suite/founder profiles curated
Audience (LinkedIn): 39 LinkedIn followers
Activity (LinkedIn): 3 product launches · 2 partnerships (incl. NovaSolix) announced in 12 mo
Funding rounds
- Apr 2026Series C$3.9M
- Nov 2024Series B$150K
- Oct 2022Series B$16.1M
- Dec 2020Series A—
Founders & team
#6
Acquired · San Jose, California · founded 2016 · 62 employees$31Mraised▾
Acquired · San Jose, California · founded 2016 · 62 employees
Manufacturers of solar modules. It provides crystalline silicon-based solar solutions which address deployments such as on metal roofs, auxiliary power for transportation, flush-mounted residential solar, and military applications. It also provides solutions for interconnect system that enables them to extract more power compared to standard solar panels and also improve the reliability performance, and ruggedness of the solar panels.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Product
top 26%Funding
top 27%Tech
top 27%Growth
top 35%Patents
top 43%Moat
top 43%Product: 11 distinct product lines · Company stage: Acquired
Funding: Raised $31.0M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) · Last round Series B (Dec 2025)
Tech: 40 technologies across 6/8 capability areas · Cloud: Cloudflare, Google Cloud · Devops: Envoy
Audience (LinkedIn): 6k LinkedIn followers
Funding rounds
- Dec 2025Series B$16.1M
- Oct 2024Series B$31M
Founders & team
Investors
Fifth Wall, Saint-Gobain, Ayala, Altos Capital Partners
Tech stack
BootstrapButtonizerCdnjsCloudflareContact Form 7Elementor
#7
Series C · Alameda, California · founded 2012 · 250 employees$190Mraised▾
Series C · Alameda, California · founded 2012 · 250 employees
Developer of autonomous unmanned surface vehicle. The USVs are capable of carrying a sensor suite, deploying sensor payloads, relaying data back to shore in real-time via satellite, and can navigate to any part of the world’s oceans. They are useful for ocean monitoring, oil and gas monitoring, piloting for ships, and more. It can be launched into the ocean from a ship or a dock.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Funding
top 23%Moat
top 31%Growth
top 35%Tech
top 42%Market
top 47%Talent
bottom 49%Funding: Raised $190M across 4 rounds · 4 rounds over 10 yrs (0.4/yr) · Last round Series C (May 2025)
Moat: Editorial + unicorn rating 8/10 · IP moat: 18 patents · Soonicorn
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 40k LinkedIn followers — 8.0% of this cohort's audience
Hiring (LinkedIn): 2 hiring posts in 12 mo (public) · momentum +2 · hiring: Sr. Engineering Manager, Field Service, Corporate Controller
Activity (LinkedIn): 1 product launches announced in 12 mo
Funding rounds
- May 2025Series C$60M
- Oct 2021Series C$100M
- May 2018Series B$60M
- Sep 2016Series A$14M
Founders & team
Investors
Bond Capital, Emerson Collective, Crowley Maritime, Capricorn, Tribe Capital, Social Capital
Tech stack
CdnjsCloudflareDocusignGoogle AnalyticsGoogle Font ApiGoogle Hosted Libraries
#8
Series D · San Ramon, California · founded 2018 · 6 employees$120Mraised▾
Series D · San Ramon, California · founded 2018 · 6 employees
Saving bees with AI and robotics to protect the global food supply. They provide healthy hives and superior pollination using artificial intelligence and robotics. Addressing challenges like distance, timing, and expertise, their BeeHome technology results in lower bee colony loss and healthier hives. They offer solutions for growers seeking guaranteed quality and beekeepers desiring simplified workflows and better returns. Their mission is intrinsically linked to saving bees, impacting pollination-dependent crops. They leverage robotics, computer vision, and AI to solve challenges facing bees. They are a technology company with a social impact, focused on securing the global food supply.
Fliar Intelligence Index™ 48how this company ranks against its industry peers
Funding
top 20%Moat
top 28%Growth
top 35%AI
top 35%Product
top 36%Talent
bottom 49%Funding: Raised $120M across 8 rounds · 8 rounds over 7 yrs (1.1/yr) · Last round Series D (Jun 2025)
Moat: Editorial + unicorn rating 8/10 · Soonicorn · 4 curated direct competitors tracked
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 18k LinkedIn followers — 3.6% of this cohort's audience
Funding rounds
- Jun 2025Series D$50M
- May 2022Grant (prize money)$53.8K
- Mar 2022Series C$80M
- Jul 2020Series A$10M
Founders & team
Investors
Europa, Insight Partners, SANAD AD, Fortissimo Capital, Corner Ventures, Lool Ventures
Tech stack
Amazon SesAmazon Web ServicesCloudflareCloudflare Bot ManagementCore-JsGoogle Analytics
#9
Series A · San Francisco, California · founded 2019 · 38 employees$16.5Mraised▾
Series A · San Francisco, California · founded 2019 · 38 employees
Provider of solutions to manage PPA. It provides personalized power purchase agreements (PPAs) across your entire portfolio.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
Funding
top 36%Talent
top 38%Market
bottom 43%Global
bottom 36%Funding: Raised $16.5M · 3 rounds over 5 yrs (0.6/yr) · Last round Series A (Feb 2026)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Market: 38 employees
Audience (LinkedIn): 4k LinkedIn followers
Founders & team
Investors
Ajax Strategies, Lowercarbon Capital, Designer Fund, Bridge Investment Group, Nuveen, Climate Capital
#10
Series D · Burlingame, California · founded 2016 · 54 employees$175.6Mraised▾
Series D · Burlingame, California · founded 2016 · 54 employees
Cloud based energy storage solutions. It provides solutions to reduce energy costs, increase reliability, and contribute to a positive climate and human impact. It offers end-to-end renewable energy and storage solutions to provide sustainable power for critical infrastructure.
Fliar Intelligence Index™ 48how this company ranks against its industry peers
Funding
top 24%Moat
top 36%Tech
top 37%Talent
bottom 49%Growth
bottom 48%Market
bottom 45%Funding: Raised $176M across 4 rounds · 4 rounds over 7 yrs (0.6/yr) · Last round Series D (Feb 2025)
Moat: Editorial + unicorn rating 6/10 · Soonicorn · 10 curated direct competitors tracked
Tech: 28 technologies across 5/8 capability areas · Cloud: Cloudflare · Observability: Grafana, Sentry
Audience (LinkedIn): 6k LinkedIn followers
Funding rounds
- Feb 2025Series D$122.7M
- Jan 2023Series B$51M
- Jan 2022Grant (prize money)$40K
- Aug 2019Grant (prize money)$1.9M
Founders & team
Investors
Ember, California Energy Commission, BCP Blitz, Portfolia, Inspiration Ventures, Malaika Ventures
Tech stack
AngularjsCloudflareCloudflare Bot ManagementCore-JsEmotionGo
#11
Funding Raised · San Luis Obispo, California · founded 2005 · 8 employees$8.7Mraised▾
Funding Raised · San Luis Obispo, California · founded 2005 · 8 employees
Developer of microalgae technology and wastewater treatment plants. The company specialized in integrated processes for producing microalgae for biofuels, wastewater reclamation, and high-value products. The technology reclamation of nutrients, energy, and water allows communities and industries in warm climates to take advantage of the solar resource for wastewater treatment, recycle nutrients, and production of algae biofuel feedstock.
Fliar Intelligence Index™ 32how this company ranks against its industry peers
Innovation
top 20%Funding
top 44%Product
top 46%Talent
bottom 45%Tech
bottom 31%Global
bottom 29%Innovation: 6 product lines
Funding: Raised $8.7M across 9 rounds · 9 rounds over 10 yrs (0.9/yr) · Last round Grant (prize money) (Dec 2025)
Product: 6 distinct product lines · Company stage: Grant (prize money)
Funding rounds
- Dec 2025Grant (prize money)$198.7K
- Jul 2025Grant (prize money)$2.8M
- May 2025Grant (prize money)$2.5M
- Jul 2022Grant (prize money)$125K
Founders & team
Investors
DOE, OSTI, Imagine H2O
Tech stack
Squarespace CommerceSquarespaceStimulusGoogle AnalyticsGoogle Font ApiHsts
#12
Series D · Santa Monica, California · founded 2014 · 194 employees$114Mraised▾
Series D · Santa Monica, California · founded 2014 · 194 employees
Provider of drone-based inspection software platform. It uses machine learning for data and image-based inspection, analytics, and lifecycle management. It also captures visual data for inspections of energy and infrastructure assets.
Fliar Intelligence Index™ 76how this company ranks against its industry peers
Funding
top 18%Tech
top 27%AI
top 30%Moat
top 31%Market
top 42%Growth
top 45%Funding: Raised $114M across 8 rounds · 8 rounds over 11 yrs (0.7/yr) · Last round Series D (Mar 2025)
Tech: 44 technologies across 5/8 capability areas · Cloud: Cloudflare · Observability: Sentry
AI: Classified as an AI company · Product described with: machine learning
Audience (LinkedIn): 29k LinkedIn followers — 5.7% of this cohort's audience
Funding rounds
- Mar 2025Series D$60M
- Feb 2023Series C$55M
- Oct 2021Series C$20M
- Jun 2021Series C$12.5M
Founders & team
Investors
Valor Equity Partners, Union Square Ventures, Upfront Ventures, Energy Transition Ventures, Euclidean Capital, Hearst
Tech stack
AngularApple Icloud MailCart FunctionalityCloudflareCloudflare Bot ManagementCore-Js
Funding & investor landscape
$8.5Btotal disclosed funding
123companies funded
483disclosed rounds
1rounds last 90 days
Most active investors
Y Combinator6 rounds
Notable founders
Jack Norbeck
Co-Founder and CTO · Fervo Energy
Tim Latimer
Co-Founder · Fervo Energy
Matt Svrcek
Co-Founder & CTO · Mainspring Energy
Adam Simpson
Co-Founder & CCO · Mainspring Energy
Bruce F
Founder & CEO · Halcyon
Alex Klaessig
Chief Data Officer & Co-Founder · Halcyon
Conor Madigan
Founder and CEO · Aether Fuels
Bob Cousins
Co-Founder · NovaSolix
Rich Preston
CEO · NovaSolix
Venkatesan Murali
Founder · Merlin Solar
Richard Jenkins
Founder & CEO · Saildrone
Saar Safra
Co-Founder & CEO · BEEWISE
Prism market signals · United States · country-scoped Prism corpus, 1,902,389 docs
Market landscape — 10 sub-themes by coverage
Share of Renewable Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH IN CALIFORNIA · Energy
How research on Green Hydrogen in California is moving
A read on the academic research around Green Hydrogen in California — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 442 papers.
Caltech, UC Berkeley, and UCLA optimistically advance green hydrogen through electrocatalysts, photocatalysis, and hybrid renewable systems, with breakthrough and advancement findings dominating over concerns.
442 papers · stance +0.58 · 42% breakthrough · 10% concern
top institutions
- California Institute of Technology74
- University of California, Berkeley49
- University of California, Los Angeles49
- Sandia National Laboratories California45
- University of California, Irvine42
leading researchers
Anthony H. McDaniel · Junjie Chen · Michael R. Hoffmann · Andrea Ambrosini · Jack Brouwer · Nguyen Q. Minh
prism intelligence · tone & topics
94% positive · 1% critical tone
EnergyEnvironmentMaterials ScienceBusinessTransportationSpace Exploration
▲
Breakthroughs172 · 39%
▼ 44%→33% share
▼0.8× share momentum23 median citations42% since 2021mostly methods-led
Pyrolysis and production-economics research newly emerged, while methane-related breakthroughs rose from 1 to 8 papers, signaling turquoise-hydrogen pathways gaining ground.
rising sub-themes (early→recent)
- Hydrogen production32→40
- Chemical engineering2→10
- Methane1→8
- Electrolysis4→9
- Electrolysis of water1→6
Newly emergingProduction (economics) 0→12 · Pyrolysis 0→6 · Carbon fibers 0→4
Landmark Self-Doped Ti3+ Enhanced Photocatalyst for Hydrogen Production under Visible Light · 1,256 cites
◆
Advancements193 · 44%
▲ 42%→47% share
▲1.1× share momentum7 median citations52% since 2021mostly empirical
Hydrogen-production advancements are intensifying — catalysis papers rose from 20 to 29 and chemical engineering nearly tripled, accelerating electrolyzer efficiency gains.
rising sub-themes (early→recent)
- Hydrogen production27→52
- Chemical engineering4→14
- Catalysis20→29
- Renewable energy5→12
- Heterojunction2→7
Newly emergingCarbon fibers 0→5 · Proton exchange membrane fuel cell 0→4 · Tafel equation 0→4
Landmark Benchmarking Hydrogen Evolving Reaction and Oxygen Evolving Reaction Electrocatalysts for Solar Water Splitting Devices · 3,898 cites
▼
Concerns42 · 10%
▲ 5%→13% share
▲2.6× share momentum4 median citations67% since 2021mostly empirical
Cost and systemic concerns are rising sharply — hydrogen-economy and energy-carrier topics newly emerged as production-economics and renewable-energy concerns more than doubled.
rising sub-themes (early→recent)
- Hydrogen production3→22
- Renewable energy1→7
- Production (economics)1→4
- Hydrogen storage1→4
- Electrolysis1→3
Newly emergingHydrogen economy 0→5 · Hydrogen technologies 0→4 · Energy carrier 0→4
Landmark Artificial Photosynthesis for Sustainable Fuel and Chemical Production · 646 cites
Common questions
How many Renewable Energy Tech companies are there in California, United States?
Radar tracks 264 indexable Renewable Energy Tech companies headquartered in California, United States that meet our profile-completeness bar.
What is the total funding raised by Renewable Energy Tech companies in California, United States?
The Renewable Energy Tech companies in California, United States on this list have raised a combined $8.5B in disclosed equity funding across 123 funded companies.
Which is the highest-funded Renewable Energy Tech company in California, United States?
Solyndra is the highest-funded Renewable Energy Tech company in California, United States, with $845.2M in disclosed equity funding.
How many Renewable Energy Tech companies in California, United States are funded?
123 of the 264 Renewable Energy Tech companies in California, United States on this list have disclosed at least one equity funding round.
How many Renewable Energy Tech unicorns are there in California, United States?
3 Renewable Energy Tech companies in California, United States on this list are valued at $1B or more.
Who are the top investors in California, United States Renewable Energy Tech companies?
The most active investors in California, United States Renewable Energy Tech companies on this list include DOE, OSTI, Climate Capital, Europa, Elemental.
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.