Best Renewable Energy Tech Companies in San Francisco, United States
The 53 best Renewable Energy Tech companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Xpansiv.
Ranked: Best Renewable Energy Tech companies in San Francisco
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Xpansiv 🦄 Offsets and renewable energy marketplace | $712M | 42 mo ago | 277 | Joe Madden CEO | WordPressApple iCloud MailMicrosoft 365+28 | Top 5M | — | 3 partnerships |
| 2 | Aurora Solar 🦄 Provider of software for solar and storage system design and sales | $537M | 52 mo ago | 135 135 → 302 (+124%) | Christopher Hopper Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+37 | Top 500k | 33 patents Automated 3D building modeling and estimation using computer vision and AI algorithms. | — |
| 3 | 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 | 4 mo ago | 49 | Jack Norbeck Co-Founder and CTO | WordPressApple iCloud MailMicrosoft 365+25 | Top 5M | — | 1 launch · 3 partnerships |
| 4 | Built Robotics Develops automated dozer robots for the construction industry | $112M | 51 mo ago | 25 25 → 41 (+64%) | Andrew Liang Co-Founder | Craft CMSApple iCloud MailGoogle Workspace+16 | Top 10M | 142 patents Autonomous earth‑moving and pile‑driving equipment with AI navigation and control | 2 partnerships |
| 5 | 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 | 16 mo ago | 43 43 → 97 (+126%) | Kevin Clifford Co-Founder | — | Top 10M | — | — |
| 6 | Sunverge Developer of smart energy storage and energy management systems | $75M | 37 mo ago | 33 | Dean Sanders Co-Founder & CTO | — | — | — | — |
| 7 | AMS Provider of DERs management solutions | $65M | 78 mo ago | 60 | — | — | — | 47 patents Precision fluid dispensers and specialized bow‑fishing reel mechanisms for aquatic applications | — |
| 8 | 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 | 6 mo ago | — | Conor Madigan Founder and CEO | Craft CMSApple iCloud MailMicrosoft 365+10 | Top 10M | — | 1 launch · 1 award |
| 9 | Angaza Provider of software for product distributors to manage sales and customers | $30M | 73 mo ago | 41 | Lesley Marincola Co-Founder & CEO | WordPressMySQLMariaDB+34 | Top 5M | — | — |
| 10 | Verse Provider of SaaS-based renewable energy management platform | $26M | 26 mo ago | 2 | Seyed Madaeni Co-Founder & CEO | WordPressMarkerMySQL+37 | Top 10M | — | 1 partnership |
| 11 | Dividend Finance Online marketplace for green financing | $20M | 70 mo ago | 152 152 → 129 (-15%) | Eric White CEO | WordPressMySQLPHP+23 | Top 1M | — | — |
| 12 | Fenix International Makes plug-and-play smart batteries | $17M | 71 mo ago | 7 | — | WordPressMySQLPHP+13 | Top 50M | 46 patents Modular, self-contained mobile communication units with mesh failover and band‑agile broadband radios | — |
| 13 | 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 | 5 mo ago | 38 | Dave Coen Co-Founder | — | — | — | — |
| 14 | Tandem PV Developer of a perovskite-based solar cell | $14M | 14 mo ago | 21 | Colin Bailie Founder | Wix eCommerceWixSentry+13 | Top 50M | 34 patents Advanced tandem photovoltaic cells with spectral filtering and parameter‑matching for optimized power output | 1 expansion |
| 15 | SunFunder An online investment platform for solar projects | $10M | 50 mo ago | 6 | — | — | — | — | — |
| 16 | Enki Tech Solar module glass coating | $5M | 138 mo ago | 14 | Kevin Kopczynski CEO | — | — | — | — |
| 17 | That's Solar Online marketplace for solar | $4M | 183 mo ago | — | — | — | — | — | — |
| 18 | Cosmic Robotics Provider of robotics technology services for construction | $4M | 15 mo ago | — | James Emerick Co-Founder & CEO | WebflowGSAPLenis+10 | Top 50M | — | 1 partnership |
| 19 | Sighten Provides software for solar installers | $4M | 128 mo ago | 19 | — | — | — | — | — |
| 20 | Station A Provider of project developer recommendations using software tools and machine learning | $3M | 13 mo ago | 11 | Jeremy Lucas Co-Founder & Head of Engineering | — | — | 34 patents Identity access management workflow automation and automated spray dispensing systems | 1 job opening |
| 21 | Aether Energy Provider of an AI-powered platform for solar and roofing installers | $3M | 20 mo ago | — | Shelby Bons Co-Founder & CTO | SentryNode.jsThree.js+16 | Top 50M | — | — |
| 22 | Genability Cloud-based software for energy management and utility tariff rates | $3M | 124 mo ago | 7 | — | — | — | — | — |
| 23 | KryptonCloud Cloud-based asset performance management solution for asset-intensive businesses | $3M | 108 mo ago | 4 | — | — | — | — | — |
| 24 | Tyba Provider of solar power plant management platform | $2M | 17 mo ago | 9 | Tyler Nisonoff Co-Founder & CTO | WordPressMySQLPHP+33 | Top 10M | — | — |
| 25 | Folsom Labs Offers software platform for solar integrators | $1M | 128 mo ago | 19 | — | — | — | 12 patents Hydraulic power transmission components: pumps, motors, vectoring axles, and related machinery | — |
| 26 | Verne Provider of rapid electricity deployment solutions for industrial power needs | $500K | 6 mo ago | — | David Jaramillo Co-Founder & CTO | — | — | 25 patents Cryo‑compressed hydrogen storage vessels with thermal management and composite overwrap systems | — |
| 27 | Solarad.ai Weather intelligence platform for solar systems | $450K | 37 mo ago | 5 | Ravi Choudhary Co-Founder & CEO | — | — | — | — |
| 28 | GeoPredict Limited information available | $150K | 88 mo ago | — | Nikhil Shinday Co-Founder | — | — | — | — |
Top 12 Renewable Energy Tech companies in San Francisco
#1
Public · San Francisco, California · founded 2017 · 49 employees$420.2Mraised▾
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.
- Mar 2026Conventional Debt$421M
- Dec 2025Series E$462M
- Jun 2025Conventional Debt$105.5M
- Jun 2025Series D$100M
#2
Series A · San Francisco, California · founded 2022$45.4Mraised▾
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.
- Jan 2026Series A$15M
- Mar 2025Series A—
- Jun 2024Series A$36.9M
- Dec 2023Seed$8.5M
#3
Series A · San Francisco, California · founded 2019 · 38 employees$16.5Mraised▾
Provider of solutions to manage PPA. It provides personalized power purchase agreements (PPAs) across your entire portfolio.
#4
Series B · San Francisco, California · founded 2021 · 43 employees$102Mraised▾
Provider of software solutions for portfolio management. It provides users with a company that offers energy storage solutions, such as batteries and energy management systems, which store excess energy generated from renewable sources for later use.
- Mar 2025Series B$2.5M
- Feb 2025Series B$28M
- Oct 2024Series B$39M
- 2024Series B—
#5
Series A · San Francisco, California · founded 2017 · 21 employees$14.4Mraised▾
Developer of a perovskite-based solar cell. Its solar cell can turn more spectrum to the electricity in comparison to the conventional solar cell.
#6
Xpansiv 🦄Series D · San Francisco, California · founded 2016 · 277 employees$712.2Mraised▾
Offsets and renewable energy marketplace. Xpansiv is the world’s liquidity hub for ESG commodities such as carbon offsets, Renewable Energy Certificates (RECs), differentiated fuels, among others, providing a centralized platform for buyers and sellers to fulfill their ESG commitments.
- Jan 2023Series D$125M
- Jul 2022Series D$400M
- Sep 2021Series C$100M
- Jan 2021Series B$40M
#7
Seed · San Francisco, California · founded 2020$499.7Kraised▾
Provider of rapid electricity deployment solutions for industrial power needs. It offers solutions when the grid cannot provide sufficient power. The company's technology stack enables decentralized, rapid, and efficient power generation. It focuses on providing energy where and when it is needed.
- Jan 2026Seed—
- Mar 2025Grant (prize money)$499.7K
#8
Series B · San Francisco, California · founded 2018 · 11 employees$3.4Mraised▾
Provider of project developer recommendations using software tools and machine learning. The process includes gathering geospatial, environmental & financial data using web crawlers, structuring the data sources using machine learning and providing technology & project recommendations using user behaviour & preferences. Also uses real-world data for updating the existing models.
#9
Seed · San Francisco, California · founded 2023$4Mraised▾
Provider of robotics technology services for construction
- Apr 2025Seed$4M
#10
Series D · San Francisco, California · founded 2013 · 135 employees$537.4Mraised▾
Provider of software for solar and storage system design and sales. The platform offers tools for designing, financing, and delivering solar projects. It provides solutions for installers, sales teams, and channel managers. The software includes features such as contract management, design services, and plan sets.
- Feb 2022Series D$200M
- May 2021Series C$250M
- Nov 2020Series B$50M
- Feb 2019Series A$13M
#11
Series A · San Francisco, California · founded 2022 · 9 employees$2.2Mraised▾
Provider of solar power plant management platform. It offers solutions such as solar model analytics, efficiency and losses, grid charging, optimization, and more.
- Feb 2025Series A$13.9M
- Jan 2023Seed$2.2M
#12
Series C · San Francisco, California · founded 2009 · 33 employees$74.8Mraised▾
Developer of smart energy storage and energy management systems. It manufactures an integrated intelligent distributed energy storage system and energy management platform to manage energy flow and consumption. Its offered storage system captures solar power and delivers it when needed most. The products optimize the renewable energy systems by taking advantage of distributed generation, energy storage, and the cloud. The platform can communicate with smart home appliances such as smart plugs, thermostats, smart water heaters, and other devices to optimize energy usage and control the systems from anywhere.
- May 2023Conventional Debt$2.1M
- Mar 2022Series C$10.3M
- Apr 2021Conventional Debt$4M
- Aug 2019Series C$11M
Funding & investor landscape
Notable founders
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
How research on Green Hydrogen is moving in the United States
A read on the academic research around Green Hydrogen — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 4,853 United States-affiliated papers.
- National Laboratory of the Rockies149
- Lawrence Berkeley National Laboratory132
- Georgia Institute of Technology96
- Pacific Northwest National Laboratory90
- Stanford University88
- Hydrogen production155→386
- Catalysis129→302
- Oxygen evolution17→89
- Electrolysis35→99
- Production (economics)9→70
- Hydrogen production225→674
- Production (economics)17→159
- Catalysis177→306
- Renewable energy34→162
- Electrolysis58→157
- Hydrogen production52→208
- Production (economics)7→92
- Hydrogen economy6→63
- Renewable energy23→77
- Hydrogen technologies7→52
Where green hydrogen 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.
Who's filing green hydrogen patents in the United States
United States green hydrogen patent filing is accelerating — 37,180 filings from 8,000 assignees (2016–2025), led by AIR PROD & CHEM, Chevron USA, UOP; annual filings 3545→4185.
- AIR PROD & CHEM1589
- Chevron USA1582
- UOP1379
- Exxonmobil RES & ENG1227
- UNIV California1192
- Praxair Technology887
- Massachusetts INST Technology749
- UNIV RICE William M678