# Top 37 Energy Startups in Boston by Funding (2026)

> The 37 best-funded energy startups in Boston, ranked by total funding raised: $4.5B combined. With founding year, headquarters and each company's rounds.

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

- 1 [**Form Energy** Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration.](https://millionrounds.com/company/form-energy) Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration. *Founded* 2017 Somerville, United States **$2.0B** last round Sept 2026
- 2 [**Greenvolt Power** Greenvolt Power is a renewable energy platform that develops and operates onshore Wind and photovoltaic installations.](https://millionrounds.com/company/greenvolt-power) Greenvolt Power is a renewable energy platform that develops and operates onshore Wind and photovoltaic installations. *Founded* - Boston, United States **$411M** last round Feb 2026
- 3 [**Ramaco Resources** Ramaco Resources is a coal mining company that operates and develops metallurgical coal mines.](https://millionrounds.com/company/ramaco-resources) Ramaco Resources is a coal mining company that operates and develops metallurgical coal mines. *Founded* 2011 Lexington, United States **$350M** last round Dec 2025
- 4 [**ASI** Air Space Intelligence (ASI) is a software company that develops AI-powered systems for mission-critical operations in commercial aviation, logistics, and defense.](https://millionrounds.com/company/asi) Air Space Intelligence (ASI) is a software company that develops AI-powered systems for mission-critical operations in commercial aviation, logistics, and defense. *Founded* 2018 Boston, United States **$325M** last round Oct 2026
- 5 [**Swift Current Energy** Swift Current Energy is a renewable energy company that develops and operates clean energy projects.](https://millionrounds.com/company/swift-current-energy) Swift Current Energy is a renewable energy company that develops and operates clean energy projects. *Founded* 2016 Boston, United States **$248M** last round Feb 2026
- 6 [**BlueWave** BlueWave's vision is to protect our planet by transforming access to renewable energy.](https://millionrounds.com/company/bluewave) BlueWave's vision is to protect our planet by transforming access to renewable energy. *Founded* 2010 Boston, United States **$247M** last round Sept 2025
- 7 [**VEIR** VEIR is a technology company founded in 2019, based in Woburn, Massachusetts.](https://millionrounds.com/company/veir) VEIR is a technology company founded in 2019, based in Woburn, Massachusetts. *Founded* 2019 Woburn, United States **$185M** last round Oct 2026
- 8 [**908 Devices** 908devices manufactures battery-operated, hand-held chemical detection tools used in mass spectrometry.](https://millionrounds.com/company/908-devices) 908devices manufactures battery-operated, hand-held chemical detection tools used in mass spectrometry. *Founded* 2012 Boston, United States **$168M** last round Nov 2021
- 9 [**24M Technologies** 24M Technologies develops energy storage systems for grid and transportation applications.](https://millionrounds.com/company/24m-technologies) 24M Technologies develops energy storage systems for grid and transportation applications. *Founded* 2010 Cambridge, United States **$103M** last round Sept 2024
- 10 [**Factorial Energy** Factorial Energy focuses on sustainable future with safe, high performance batteries for EVs, homes, and critical applications.](https://millionrounds.com/company/factorial-energy) Factorial Energy focuses on sustainable future with safe, high performance batteries for EVs, homes, and critical applications. *Founded* 2021 Woburn, United States **$100M** last round Jun 2026
- 11 [**Vertical Semiconductor** Vertical Semiconductor is an MIT-spun company dedicated to reinventing power conversion for AI chips and data centers.](https://millionrounds.com/company/vertical-semiconductor) Vertical Semiconductor is an MIT-spun company dedicated to reinventing power conversion for AI chips and data centers. *Founded* - Cambridge, United States **$84M** last round Oct 2026
- 12 [**VionX Energy** VionX Energy is an energy company manufacturing power and energy storage products to deliver long run-time and cost-competitive operation.](https://millionrounds.com/company/vionx-energy) VionX Energy is an energy company manufacturing power and energy storage products to deliver long run-time and cost-competitive operation. *Founded* 2002 Woburn, United States **$58M** last round Jun 2015
- 13 [**Elevate Renewable Energy** Elevate Renewable Energy Dedicated to the strategic deployment of battery energy storage resources.](https://millionrounds.com/company/elevate-renewable-energy) Elevate Renewable Energy Dedicated to the strategic deployment of battery energy storage resources. *Founded* 2022 Boston, United States **$50M** last round Apr 2026
- 14 [**Fourth Power** Fourth Power is an innovative energy technology company based in Cambridge, Massachusetts.](https://millionrounds.com/company/fourth-power) Fourth Power is an innovative energy technology company based in Cambridge, Massachusetts. *Founded* 2021 Cambridge, United States **$39M** last round Sept 2025
- 15 [**Adden Energy** Adden Energy is a Harvard University spinout based in Waltham, Massachusetts, founded in 2021.](https://millionrounds.com/company/adden-energy) Adden Energy is a Harvard University spinout based in Waltham, Massachusetts, founded in 2021. *Founded* 2021 Waltham, United States **$32M** last round Oct 2026
- 16 [**Cala Systems** We design, manufacture, and sell the world's first intelligent heat pump water heater.](https://millionrounds.com/company/cala-systems) We design, manufacture, and sell the world's first intelligent heat pump water heater. *Founded* 2020 Boston, United States **$24M** last round Oct 2026
- 17 [**Emvolon** Emvolon is a technology company that converts wasted resources into low-cost green fuels](https://millionrounds.com/company/emvolon) Emvolon is a technology company that converts wasted resources into low-cost green fuels *Founded* 2021 Boston, United States **$22M** last round Oct 2026
- 18 [**Atomarine** Atomarine builds floating, modular offshore data center barges cooled by seawater and powered by standalone vessels to bypass land grids.](https://millionrounds.com/company/atomarine) Atomarine builds floating, modular offshore data center barges cooled by seawater and powered by standalone vessels to bypass land grids. *Founded* - Cambridge, United States **$20M** last round Nov 2026
- 19 [**Fourier** Fourier is a thermal management solutions ranging from high power density electronics to renewable energy to space applications.](https://millionrounds.com/company/fourier) Fourier is a thermal management solutions ranging from high power density electronics to renewable energy to space applications. *Founded* 2022 Boston, United States **$19M** last round Apr 2025
- 20 [**GreenStruxure** GreenStruxure is a joint venture established in September 2020 by Schneider Electric, Huck Capital, and ClearGen.](https://millionrounds.com/company/greenstruxure) GreenStruxure is a joint venture established in September 2020 by Schneider Electric, Huck Capital, and ClearGen. *Founded* 2020 Boston, United States **$15M** last round Jun 2022
- 21 [**Sora Fuel** Sora Fuel makes jet fuel from just air, water, and renewable energy.](https://millionrounds.com/company/sora-fuel) Sora Fuel makes jet fuel from just air, water, and renewable energy. *Founded* 2024 Cambridge, United States **$15M** last round Apr 2026
- 22 [**Soane Energy** Soane Energy is developing and applying innovative chemical solutions based on polymers and surface science to help meet this worldwide "hunger for energy" in a](https://millionrounds.com/company/soane-energy) Soane Energy is developing and applying innovative chemical solutions based on polymers and surface science to help meet this worldwide "hunger for energy" in a *Founded* 2006 Cambridge, United States **$10M** last round Sept 2009
- 23 [**florrent** florrent, Inc.](https://millionrounds.com/company/florrent) florrent, Inc. *Founded* 2020 Somerville, United States **$9.5M** last round Sept 2025
- 24 [**Tank Utility** Tank Utility streamlines energy delivery for those that rely on truck-delivered oil or propane.](https://millionrounds.com/company/tank-utility) Tank Utility streamlines energy delivery for those that rely on truck-delivered oil or propane. *Founded* 2014 Boston, United States **$8.2M** last round Feb 2019
- 25 [**SYSO Technologies** SYSO Technologies is a Boston-based renewable energy and technology company founded in 2019.](https://millionrounds.com/company/syso-technologies) SYSO Technologies is a Boston-based renewable energy and technology company founded in 2019. *Founded* 2019 Boston, United States **$7.0M** last round Jan 2026
- 26 [**ELECTRA AI** ELECTRA AI, based in Boston, Massachusetts, is an innovative cleantech and B2B software company focused on advancing electrification.](https://millionrounds.com/company/electra-ai) ELECTRA AI, based in Boston, Massachusetts, is an innovative cleantech and B2B software company focused on advancing electrification. *Founded* 2015 Boston, United States **$5.0M** last round Nov 2026
- 27 [**American Ag Energy** American Ag Energy is a dynamic company improves the interrelated food and energy networks.](https://millionrounds.com/company/american-ag-energy) American Ag Energy is a dynamic company improves the interrelated food and energy networks. *Founded* - Cambridge, United States **$3.7M** last round Oct 2023
- 28 [**Energy Points** Energy Points is a health-tech company dedicated to supporting cancer patients and survivors through its mobile app.](https://millionrounds.com/company/energy-points) Energy Points is a health-tech company dedicated to supporting cancer patients and survivors through its mobile app. *Founded* 2011 Boston, United States **$3.0M** last round Feb 2012
- 29 [**American DG Energy** American DG Energy Inc.](https://millionrounds.com/company/american-dg-energy) American DG Energy Inc. *Founded* 2001 Waltham, United States **$2.1M** last round Oct 2010
- 30 [**Vicinity Energy** Vicinity Energy is a provider of district energy solutions, offering energy supply, infrastructure investment and management services.](https://millionrounds.com/company/vicinity-energy) Vicinity Energy is a provider of district energy solutions, offering energy supply, infrastructure investment and management services. *Founded* 2020 Boston, United States **$2.0M** last round Jun 2025
- 31 [**Pecos Wind Power** Pecos Wind Power designs, builds, and sells wind turbines for distributed generation.](https://millionrounds.com/company/pecos-wind-power) Pecos Wind Power designs, builds, and sells wind turbines for distributed generation. *Founded* 2017 Somerville, United States **$1.1M** last round Aug 2024
- 32 [**Dynamo Micropower** Dynamo Micropower develops a turbine based power solution (50HP) for the oilfield that provides grid-like power quality while saving money.](https://millionrounds.com/company/dynamo-micropower) Dynamo Micropower develops a turbine based power solution (50HP) for the oilfield that provides grid-like power quality while saving money. *Founded* 2011 Somerville, United States **$721K** last round Jul 2014
- 33 [**Kuva Systems** Kuva Systems is an industrial IoT solutions company that provides emissions monitoring and quantification of methane and VOC.](https://millionrounds.com/company/kuva-systems) Kuva Systems is an industrial IoT solutions company that provides emissions monitoring and quantification of methane and VOC. *Founded* 2016 Cambridge, United States **$692K** last round Dec 2025
- 34 [**Helix Power** Helix Power is a development stage company designing a next generation power management platform using flywheel technology.](https://millionrounds.com/company/helix-power) Helix Power is a development stage company designing a next generation power management platform using flywheel technology. *Founded* 1979 Somerville, United States **$531K** last round Nov 2021
- 35 [**SolarKal** SolarKal is the largest B2B solar energy marketplace in the US, connecting organizations to solar providers who compete for their business.](https://millionrounds.com/company/solarkal) SolarKal is the largest B2B solar energy marketplace in the US, connecting organizations to solar providers who compete for their business. *Founded* 2016 Somerville, United States **$500K** last round May 2018
- 36 [**NewGrid** NewGrid is a Developer of a decision support software for electric power transmission system operators.](https://millionrounds.com/company/newgrid) NewGrid is a Developer of a decision support software for electric power transmission system operators. *Founded* 2015 Boston, United States **$250K** last round Aug 2021
- 37 [**OffGridBox** OffGridBox is a technology company founded in 2016, dedicated to providing affordable clean water and renewable energy to remote, off-grid communities worldwide.](https://millionrounds.com/company/offgridbox) OffGridBox is a technology company founded in 2016, dedicated to providing affordable clean water and renewable energy to remote, off-grid communities worldwide. *Founded* 2016 Somerville, United States **$13K** last round Apr 2024

**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 Boston 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)

## More energy lists

[See all](https://millionrounds.com/top-lists?t=Energy)

[*CE* *C* *SE* **Energy startups worldwide** 1,800 companies · $129B](https://millionrounds.com/top-lists/energy-startups)[*CE* *C* *SE* **Energy startups in the United States** 741 companies · $110B](https://millionrounds.com/top-lists/energy-startups-united-states)[*N* *V* *S* **Energy startups in Europe** 607 companies · $39B](https://millionrounds.com/top-lists/energy-startups-europe)[*C* *ME* *W* **Energy startups that raised in 2026** 429 companies · $73B in 2026](https://millionrounds.com/top-lists/energy-startups-raised-2026)[*S* *RS* *C* **Energy startups in the United Kingdom** 206 companies · $15B](https://millionrounds.com/top-lists/energy-startups-united-kingdom)[*C* *ME* *W* **Energy startups in the United States that raised in 2026** 194 companies · $63B in 2026](https://millionrounds.com/top-lists/energy-startups-united-states-raised-2026)[*AE* *TE* *RS* **Energy startups founded in 2021** 111 companies · $8.5B](https://millionrounds.com/top-lists/energy-startups-founded-2021)[*V* *UC* *E* **Energy startups founded in 2020** 105 companies · $15B](https://millionrounds.com/top-lists/energy-startups-founded-2020)

## More lists for Boston

[See all](https://millionrounds.com/top-lists?r=Boston)

[*R* *D* *W* **Startups in Boston** 830 companies · $21B](https://millionrounds.com/top-lists/startups-boston)[*DH* *BM* *W* **Health startups in Boston** 617 companies · $27B](https://millionrounds.com/top-lists/health-startups-boston)[*R* *S* *D* **AI startups in Boston** 197 companies · $12B](https://millionrounds.com/top-lists/ai-startups-boston)[*W* *IT* *CT* **Biotech startups in Boston** 125 companies · $10B](https://millionrounds.com/top-lists/biotech-startups-boston)[*W* *IT* *P* **Healthcare startups in Boston** 99 companies · $7.8B](https://millionrounds.com/top-lists/healthcare-startups-boston)[*MG* *E* *B* **IT Services startups in Boston** 76 companies · $1.7B](https://millionrounds.com/top-lists/it-services-startups-boston)[*D* *C* *A* **Big Data & Analytics startups in Boston** 58 companies · $2.4B](https://millionrounds.com/top-lists/big-data-startups-boston)[*WR* *QC* *T* **Deep tech startups in Boston** 39 companies · $1.8B](https://millionrounds.com/top-lists/deep-tech-startups-boston)