# Top 50 Energy Startups in Bay Area by Funding (2026)

> The 50 best-funded energy startups in Bay Area, ranked by total funding raised: $8.1B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/energy-startups-bay-area (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Generate Capital** Generate Capital is an investment and operating platform for sustainable infrastructure.](https://millionrounds.com/company/generate-capital) Generate Capital is an investment and operating platform for sustainable infrastructure. *Founded* 2014 San Francisco, United States **$1.3B** last round Sept 2026
- 2 [**Pacific Fusion** Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.](https://millionrounds.com/company/pacific-fusion) Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes. *Founded* 1997 Fremont, United States **$900M** last round Nov 2024
- 3 [**Primergy Solar** Primergy Solar is a developer, owner and operator focused on both distributed and utility scale solar PV and battery storage projects.](https://millionrounds.com/company/primergy-solar) Primergy Solar is a developer, owner and operator focused on both distributed and utility scale solar PV and battery storage projects. *Founded* 2019 Oakland, United States **$760M** last round Mar 2026
- 4 [**Armada** Armada is a pioneering company that offers a full-stack edge computing platform designed for remote and bandwidth-constrained industrial environments.](https://millionrounds.com/company/armada) Armada is a pioneering company that offers a full-stack edge computing platform designed for remote and bandwidth-constrained industrial environments. *Founded* 2022 San Francisco, United States **$591M** last round Sept 2026
- 5 [**Antora Energy** Antora Energy is an American energy technology company founded in 2018, focused on developing modular thermal batteries that provide reliable, zero-emission hea](https://millionrounds.com/company/antora-energy) Antora Energy is an American energy technology company founded in 2018, focused on developing modular thermal batteries that provide reliable, zero-emission hea *Founded* 2018 San Jose, United States **$565M** last round Jul 2025
- 6 [**Unconventional AI** Unconventional AI rethinks computer foundations to optimize energy efficiency for AI.](https://millionrounds.com/company/unconventional-ai) Unconventional AI rethinks computer foundations to optimize energy efficiency for AI. *Founded* - San Francisco, United States **$475M** last round Dec 2025
- 7 [**BridgeLux** Bridgelux develops eco-friendly light emitting diodes that reduce energy consumption.](https://millionrounds.com/company/bridgelux) Bridgelux develops eco-friendly light emitting diodes that reduce energy consumption. *Founded* 2002 Fremont, United States **$345M** last round Feb 2012
- 8 [**Lunar Energy** Lunar Energy is a renewable energy company based in Mountain View, California, founded in 2020.](https://millionrounds.com/company/lunar-energy) Lunar Energy is a renewable energy company based in Mountain View, California, founded in 2020. *Founded* 2020 Mountain View, United States **$334M** last round Feb 2026
- 9 [**EnerVenue** EnerVenue is an energy storage infrastructure company based in Fremont, California, founded in 2020.](https://millionrounds.com/company/enervenue) EnerVenue is an energy storage infrastructure company based in Fremont, California, founded in 2020. *Founded* 2020 Fremont, United States **$312M** last round Mar 2026
- 10 [**Mainspring Energy** Mainspring Energy is a power generation company based in Menlo Park, California, founded in 2010.](https://millionrounds.com/company/mainspring-energy) Mainspring Energy is a power generation company based in Menlo Park, California, founded in 2010. *Founded* 2010 Menlo Park, United States **$258M** last round Apr 2025
- 11 [**Apollo** Apollo helps engineering teams build unified graphs to accelerate application development and deliver better, more cohesive experiences.](https://millionrounds.com/company/apollo) Apollo helps engineering teams build unified graphs to accelerate application development and deliver better, more cohesive experiences. *Founded* 2016 San Francisco, United States **$242M** last round Apr 2025
- 12 [**Siluria Technologies** Siluria Technologies is a material innovation company developing processes for transforming natural gas into chemicals and fuels.](https://millionrounds.com/company/siluria-technologies) Siluria Technologies is a material innovation company developing processes for transforming natural gas into chemicals and fuels. *Founded* 2008 San Francisco, United States **$209M** last round Jul 2016
- 13 [**Booster** Booster Fuels, Inc., founded in 2014 in San Mateo, California, is a mobile energy delivery company focused on transforming the fueling experience.](https://millionrounds.com/company/booster) Booster Fuels, Inc., founded in 2014 in San Mateo, California, is a mobile energy delivery company focused on transforming the fueling experience. *Founded* 2014 Foster City, United States **$201M** last round May 2022
- 14 [**Velaura AI** Velaura AI is a Silicon Valley-based company specializing in AI compute infrastructure.](https://millionrounds.com/company/velaura-ai) Velaura AI is a Silicon Valley-based company specializing in AI compute infrastructure. *Founded* - Santa Clara, United States **$110M** last round Aug 2026
- 15 [**Calysta** Calysta is a biotechnology company based in California, specializing in cellular agriculture.](https://millionrounds.com/company/calysta) Calysta is a biotechnology company based in California, specializing in cellular agriculture. *Founded* 2011 San Mateo, United States **$109M** last round Mar 2021
- 16 [**R-Zero** R-Zero is a San Francisco-based smart building technology company founded in 2020.](https://millionrounds.com/company/r-zero) R-Zero is a San Francisco-based smart building technology company founded in 2020. *Founded* 2020 San Francisco, United States **$105M** last round Feb 2023
- 17 [**Mitra Chem** Mitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California.](https://millionrounds.com/company/mitra-chem) Mitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California. *Founded* 2021 Mountain View, United States **$91M** last round Jun 2025
- 18 [**Deep Fission** Deep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep.](https://millionrounds.com/company/deep-fission) Deep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep. *Founded* - Berkeley, United States **$80M** last round Feb 2026
- 19 [**Light** Light is a depth-sensing and perception technology company that provides automation solutions for automobiles.](https://millionrounds.com/company/light) Light is a depth-sensing and perception technology company that provides automation solutions for automobiles. *Founded* 2013 Redwood City, United States **$80M** last round Sept 2026
- 20 [**GridCARE** GridCARE is an energy technology company based in Redwood City, California, founded in 2024.](https://millionrounds.com/company/gridcare) GridCARE is an energy technology company based in Redwood City, California, founded in 2024. *Founded* 2024 Redwood City, United States **$78M** last round May 2026
- 21 [**OhmConnect** OhmConnect provides a software based powerplant which assists users in reducing their use of electricity.](https://millionrounds.com/company/ohmconnect) OhmConnect provides a software based powerplant which assists users in reducing their use of electricity. *Founded* 2013 Oakland, United States **$64M** last round Jun 2022
- 22 [**Idemitsu Renewables** Idemitsu Renewables is a renewable energy business of Idemitsu Kosan.](https://millionrounds.com/company/idemitsu-renewables) Idemitsu Renewables is a renewable energy business of Idemitsu Kosan. *Founded* 2010 San Francisco, United States **$61M** last round Jul 2022
- 23 [**NEOS GeoSolutions** NEOS GeoSolutions, Inc.](https://millionrounds.com/company/neos-geosolutions) NEOS GeoSolutions, Inc. *Founded* 2011 Pleasanton, United States **$60M** last round Jan 2011
- 24 [**Natron Energy** Natron Energy is an energy storage company that develops sodium ion battery solutions leveraging Prussian Blue electrode materials.](https://millionrounds.com/company/natron-energy) Natron Energy is an energy storage company that develops sodium ion battery solutions leveraging Prussian Blue electrode materials. *Founded* 2012 Santa Clara, United States **$55M** last round Apr 2025
- 25 [**Varentec** Varentec is a provider of power electronics-based Smart Grid control solutions for municipal, cooperatives and investor-owned utilities.](https://millionrounds.com/company/varentec) Varentec is a provider of power electronics-based Smart Grid control solutions for municipal, cooperatives and investor-owned utilities. *Founded* 2009 Santa Clara, United States **$55M** last round Nov 2019
- 26 [**Alphabet Energy** Alphabet Energy was a startup based in Hayward, California, founded in 2009 by Matthew L.](https://millionrounds.com/company/alphabet-energy) Alphabet Energy was a startup based in Hayward, California, founded in 2009 by Matthew L. *Founded* 2009 Hayward, United States **$55M** last round Jul 2016
- 27 [**Aetherflux** Aetherflux develops a novel design for space.](https://millionrounds.com/company/aetherflux) Aetherflux develops a novel design for space. *Founded* - San Carlos, United States **$50M** last round Apr 2025
- 28 [**Aurelius Systems** Aurelius Systems builds AI-powered directed energy laser defense platforms protecting troops, bases, and infrastructure from UAS drone threats.](https://millionrounds.com/company/aurelius-systems) Aurelius Systems builds AI-powered directed energy laser defense platforms protecting troops, bases, and infrastructure from UAS drone threats. *Founded* - San Francisco, United States **$50M** last round Aug 2026
- 29 [**General Matter** General Matter is a nuclear energy company that produces enriched uranium fuel for nuclear energy applications.](https://millionrounds.com/company/general-matter) General Matter is a nuclear energy company that produces enriched uranium fuel for nuclear energy applications. *Founded* 2024 San Francisco, United States **$50M** last round Apr 2025
- 30 [**Caban Systems** Caban Systems designs a software enabled energy storage solution for telecom infrastructure providers worldwide.](https://millionrounds.com/company/caban-systems) Caban Systems designs a software enabled energy storage solution for telecom infrastructure providers worldwide. *Founded* 2018 Burlingame, United States **$50M** last round Apr 2025
- 31 [**Voya Energy** Our abundant electric future demands a radical new energy delivery system - untethered from the grid and powered by a superior new class of carbon-free fuel.](https://millionrounds.com/company/voya-energy) Our abundant electric future demands a radical new energy delivery system - untethered from the grid and powered by a superior new class of carbon-free fuel. *Founded* 2025 Hayward, United States **$48M** last round Aug 2026
- 32 [**LightSail Energy** LightSail Energy develops energy storage systems.](https://millionrounds.com/company/lightsail-energy) LightSail Energy develops energy storage systems. *Founded* 2009 Berkeley, United States **$43M** last round Feb 2013
- 33 [**Optivolt** Millions of homes just became eligible for solar power.](https://millionrounds.com/company/optivolt) Millions of homes just became eligible for solar power. *Founded* 2017 San Francisco, United States **$37M** last round Oct 2026
- 34 [**Anthro Energy** Anthro Energy is a materials company that offers build batteries to enable radically new electronics.](https://millionrounds.com/company/anthro-energy) Anthro Energy is a materials company that offers build batteries to enable radically new electronics. *Founded* 2020 San Jose, United States **$30M** last round Apr 2026
- 35 [**Electrochemistry Foundry** Electrochemistry Foundry is a nonprofit innovation platform for bridge battery manufacturing gap.](https://millionrounds.com/company/electrochemistry-foundry) Electrochemistry Foundry is a nonprofit innovation platform for bridge battery manufacturing gap. *Founded* - Hayward, United States **$28M** last round Apr 2026
- 36 [**Swift Solar** Swift Solar is a U.S.-based solar technology company founded in 2017, emerging from collaborations with MIT, Stanford University, and the National Renewable Ene](https://millionrounds.com/company/swift-solar) Swift Solar is a U.S.-based solar technology company founded in 2017, emerging from collaborations with MIT, Stanford University, and the National Renewable Ene *Founded* 2017 San Carlos, United States **$27M** last round Jun 2024
- 37 [**Buzz Solutions** Buzz Solutions specializes in visual intelligence solutions aimed at inspecting, maintaining, and securing energy infrastructure.](https://millionrounds.com/company/buzz-solutions) Buzz Solutions specializes in visual intelligence solutions aimed at inspecting, maintaining, and securing energy infrastructure. *Founded* 2017 Palo Alto, United States **$25M** last round Aug 2026
- 38 [**OneD Battery Sciences** OneD Battery Sciences is a nanotechnology company based in Palo Alto, California, founded in 2013.](https://millionrounds.com/company/oned-battery-sciences) OneD Battery Sciences is a nanotechnology company based in Palo Alto, California, founded in 2013. *Founded* 2013 Palo Alto, United States **$25M** last round Sept 2022
- 39 [**Oorja Fuel Cells** Oorja Fuel Cells is a global energy company that designs, manufactures, and commercializes Direct Methanol Fuel Cells (DMFC).](https://millionrounds.com/company/oorja-fuel-cells) Oorja Fuel Cells is a global energy company that designs, manufactures, and commercializes Direct Methanol Fuel Cells (DMFC). *Founded* 2004 Fremont, United States **$21M** last round Feb 2014
- 40 [**EvolOH** EVOLOH is a cleantech company based in Santa Clara, California, founded in April 2020.](https://millionrounds.com/company/evoloh) EVOLOH is a cleantech company based in Santa Clara, California, founded in April 2020. *Founded* 2020 Santa Clara, United States **$20M** last round Mar 2024
- 41 [**Natel Energy** Natel Energy is a supplier of sustainable hydropower solutions that produce reliable renewable energy.](https://millionrounds.com/company/natel-energy) Natel Energy is a supplier of sustainable hydropower solutions that produce reliable renewable energy. *Founded* 2005 Alameda, United States **$15M** last round Jul 2025
- 42 [**Circularity Fuels** Circularity Fuels converts biogas into sustainable aviation fuel.](https://millionrounds.com/company/circularity-fuels) Circularity Fuels converts biogas into sustainable aviation fuel. *Founded* - Palo Alto, United States **$15M** last round Nov 2026
- 43 [**Enpower Greentech** Enpower Greentech specializes in the development of Next-Generation batteries, including Lithium Metal Batteries.](https://millionrounds.com/company/enpower-greentech) Enpower Greentech specializes in the development of Next-Generation batteries, including Lithium Metal Batteries. *Founded* 2012 San Jose, United States **$14M** last round Dec 2025
- 44 [**Gridtential Energy** Gridtential Energy provides AGM battery technology services.](https://millionrounds.com/company/gridtential-energy) Gridtential Energy provides AGM battery technology services. *Founded* 2010 Santa Clara, United States **$13M** last round Apr 2021
- 45 [**Splight** Splight is an AI-driven grid technology company founded in 2021, headquartered in San Mateo, California, with additional offices in Austin, Santiago, and Spain.](https://millionrounds.com/company/splight) Splight is an AI-driven grid technology company founded in 2021, headquartered in San Mateo, California, with additional offices in Austin, Santiago, and Spain. *Founded* 2021 San Francisco, United States **$12M** last round Aug 2025
- 46 [**Proof Energy** We are revolutionizing power generation using readily available renewable fuels.](https://millionrounds.com/company/proof-energy) We are revolutionizing power generation using readily available renewable fuels. *Founded* 2019 Fremont, United States **$12M** last round Jul 2022
- 47 [**Tandem PV** Tandem PV provides a unique opportunity for solar to reach new heights.](https://millionrounds.com/company/tandem-pv) Tandem PV provides a unique opportunity for solar to reach new heights. *Founded* 2016 Fremont, United States **$12M** last round Aug 2026
- 48 [**Inlyte Energy** Inlyte Energy is a company that creates grid storage batteries.](https://millionrounds.com/company/inlyte-energy) Inlyte Energy is a company that creates grid storage batteries. *Founded* 2021 Berkeley, United States **$8.0M** last round Sept 2025
- 49 [**Powerline** Powerline is a climate-tech company based in Palo Alto, California, focused on transforming the global electricity grid.](https://millionrounds.com/company/powerline) Powerline is a climate-tech company based in Palo Alto, California, focused on transforming the global electricity grid. *Founded* 2021 San Jose, United States **$7.0M** last round Feb 2026
- 50 [**Amphiform** Amphiform is a clean energy company that develops materials for scalable and portable power systems using atom-by-atom engineering.](https://millionrounds.com/company/amphiform) Amphiform is a clean energy company that develops materials for scalable and portable power systems using atom-by-atom engineering. *Founded* - San Francisco, United States **$5.5M** last round May 2026

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

Open any company for its rounds and investors, or search the investors who back energy startups in Bay Area in the app, with filters, lists and exports.

[Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists)

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