Best Energy Companies in Massachusetts, United States
The 322 best Energy companies in Massachusetts, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: CFS.
Our analysis of 171 Energy companies
$71.4b in tracked funding; 82% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Massachusetts
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | CFS Provider of tokamak nuclear fusion reactors 67Funding top 16%News top 21%Tech top 22%Growth top 29% All 11 signals ▾Fundingtop 16% Newstop 21% Techtop 22% Growthtop 29% Talenttop 29% Moattop 35% Marketbottom 49% Globalbottom 39% Innovationbottom 36% Patentsbottom 35% Partnersbottom 32% Funding: Raised $2.1B across 6 rounds · 6 rounds over 8 yrs (0.8/yr) News: 11 BI events in 12 mo (of 23 tracked, 5 types) · +120% YoY rank vs industry peers · Fliar Intelligence Index 67/100 | $2.1B | 9 mo ago | 151 | 2018 | Bob Mumgaard Co-Founder & CEO | 5 patents EBV-based diagnostic and therapeutic assays for chronic fatigue syndrome | 1 launch · 1 partnership |
| 2 | Agilitas Energy Provider of design, build, own and operate battery energy storage | $350M | 25 mo ago | 31 31 → 47 (+52%) | 2014 | Barrett Bilotta Co-Founder | — | — |
| 3 | GE Vernova Provider of technologies and services for the electric power industry | $250M | 12 mo ago | — | 1878 | Scott Strazik CEO | — | — |
| 4 | Dandelion Energy Provider of earth-powered geothermal heating and cooling systems for residential homes, leveraging its… | $176M | 20 mo ago | 98 98 → 112 (+14%) | 2017 | Kathy Hannun Founder & President | — | — |
| 5 | Enel X Developer of utility-scale renewable energy projects | $168M | 65 mo ago | 513 | 2001 | — | — | — |
| 6 | 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 | — |
| 7 | 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 | — | — | — |
| 8 | Ogin Energy Affordable, clean energy solutions for everyone through innovative turbine technology | $96M | 150 mo ago | 108 | 2007 | — | — | — |
| 9 | Amsc Powering smarter, cleaner energy solutions for grid and wind turbine technologies | $92M | 132 mo ago | 328 328 → 510 (+55%) | 1987 | Greg Yurek Founder | — | — |
| 10 | BlueWave Developer of solar and wind energy projects | $64M | 33 mo ago | 58 | 2010 | Sean Finnerty CEO | — | — |
| 11 | Renew Energy Partners Energy finance solutions | $42M | 46 mo ago | 21 | 2013 | Stephen Pritchard Co-Founder | — | 1 award |
| 12 | Colossus Provider of solar panel installation services | $41M | 53 mo ago | 200 | 2016 | — | — | — |
| 13 | Ameresco Developer of energy efficiency, storage, and renewable natural gas 69Partners top 18%News top 22%Product top 22%Talent top 25% All 14 signals ▾Partnerstop 18% Newstop 22% Producttop 22% Talenttop 25% Markettop 30% Fundingtop 30% Fin. healthtop 32% Growthtop 38% Techtop 46% Moattop 47% Patentstop 49% Innovationbottom 44% Globalbottom 32% Customersbottom 7% Partners: 5 contract events in 12 mo · Named contractor/client in 5 deals News: 24 BI events in 12 mo (of 222 tracked, 9 types) · +71% YoY rank vs industry peers · Fliar Intelligence Index 69/100 | $40M | 7 mo ago | 1,126 | 2000 | David Anderson Co-Founder and Strategic Advisor | 4 patents Density-gradient separation systems for liquid-phase purification and biotech processing | — |
| 14 | VEIR Developer of non-renewable energy based power projects | $36M | 16 mo ago | 34 | 2019 | — | 39 patents Superconducting power transmission conductors, cooling systems, and support structures for HTS lines | — |
| 15 | Danotek Motion Technologies Real-time Hong Kong lottery results, data analysis, and transparent broadcasts | $36M | 177 mo ago | — | 2001 | Daniel Gizaw President and CEO | — | — |
| 16 | Raptor Maps Provider of solar asset management platform using aerial and sensor data 57AI top 15%Funding top 32%Growth top 32%Talent top 34% All 12 signals ▾AItop 15% Fundingtop 32% Growthtop 32% Talenttop 34% Producttop 40% Moattop 41% Techbottom 49% Marketbottom 41% Globalbottom 39% Innovationbottom 33% Patentsbottom 31% Newsbottom 21% AI: Holds AI/ML patents (G06N-family CPC) Funding: Raised $27.5M across 6 rounds · 6 rounds over 11 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 57/100 | $28M | 18 mo ago | 64 | 2015 | Edward Obropta Co-Founder & CTO | 4 patents UAV‑based remote sensing and edge computing for precision agriculture crop monitoring | — |
| 17 | First Wind Wind Energy development company | $17M | 170 mo ago | 201 | 2002 | Tim Rosenzweig Co-Founder & Chief Financial Officer | — | — |
| 18 | GreenStruxure Manufacturer of power distribution equipments | $15M | 48 mo ago | 62 | 2020 | Jose Lorenzo CEO | — | — |
| 19 | BRIDGE Energy Group Consultants for smart grid | $11M | 176 mo ago | 68 | 2004 | — | — | — |
| 20 | Active Surfaces Developer of ultra-thin, lightweight, flexible, low-cost solar cells. 16Talent top 38%Funding top 43%Moat bottom 38%Global bottom 36% All 6 signals ▾Talenttop 38% Fundingtop 43% Moatbottom 38% Globalbottom 36% Newsbottom 22% Marketbottom 21% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $9.7M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 16/100 | $10M | 12 mo ago | 2 | 2022 | Shiv Bhakta Co-Founder | — | — |
| 21 | Transatomic Developer of small modular reactor | $9M | 128 mo ago | 4 | 2010 | Russ Wilcox Co-Founder and Board Director | — | — |
| 22 | GreenerU Energy efficient solutions for educational institutions | $9M | 158 mo ago | 13 13 → 24 (+85%) | 2009 | Robert Durning CEO | — | 2 awards |
| 23 | Triton Anchor Developer of anchoring solutions for floating offshore wind and marine energy | $8M | 9 mo ago | 6 | 2022 | Ross Haghighat CEO | — | — |
| 24 | Solstice Community solar provider unlocking clean energy access and savings for all | $7M | 65 mo ago | 55 | 2016 | Sandhya Murali Co-Founder and COO | 2 patents Provides medical fiducial markers for image-guided surgery and diagnostics. | 1 expansion |
| 25 | florrent Design and build energy density ultra capacitors that will stabilize electrical grids | $7M | 11 mo ago | 7 | 2020 | — | 5 patents Patents concentrated in chemistry & materials | 1 partnership |
| 26 | Sora Fuel Provider of oil & gas exploration and production services | $7M | 3 mo ago | — | 2024 | Patrick Sarver Cofounder and CSO | — | 1 launch · 1 partnership · 1 expansion |
| 27 | Free Flow Power Hydropower Project Developer | $6M | 192 mo ago | 12 | 2007 | Daniel Irvin Co-Founder | — | — |
| 28 | Sungage Financial Provider of solar financing services | $5M | 11 mo ago | 71 71 → 108 (+52%) | 2011 | Sylvain Mansier Co-Founder & President | — | 1 job opening · 1 partnership |
| 29 | Infinium Manufacturer of wind turbines | $5M | 70 mo ago | 7 | 2008 | Adam C. Powell Co-Founder & CTO | 254 patents Carbon capture and conversion to low‑carbon fuels and hydrogen via electro‑chemical reactors | — |
| 30 | ReMo Energy Provider of renewable energy services | $5M | 47 mo ago | 8 | 2020 | Scott Rackey CEO | — | — |
| 31 | ReGen Power Systems Developer of combustion engine to convert range of heat sources to produce power | $5M | 211 mo ago | 11 | 1995 | Ricardo Conde Founder & President | — | — |
| 32 | Singularity Supplier of electricity | $5M | 48 mo ago | 10 | 2018 | Wenbo Shi Founder | 4 patents Collaborative digital document viewing and sharing interfaces | — |
| 33 | Yeloha Solar sharing | $4M | 134 mo ago | 20 | 2012 | — | — | — |
| 34 | World Energy Provider of sustainable biofuels and carbon offset solutions | $4M | 49 mo ago | 127 127 → 86 (-32%) | 2011 | — | 83 patents Enhanced downhole steam generation and hydrocarbon recovery for tight shale formations | — |
| 35 | Reservoir Power Developer of sustainable power grids for high-value power projects 53Talent top 35%Funding top 47%Global bottom 25% All 3 signals ▾Talenttop 35% Fundingtop 47% Globalbottom 25% Talent: 3 named leaders on record Funding: Raised $4.1M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 53/100 | $4M | 5 mo ago | — | 2025 | William Bliss Co-Founder & Chief Development Officer | — | — |
| 36 | Fusion Optix Organizer of annual international running events | $4M | 168 mo ago | 37 | 2003 | Terence Yeo Founder & CEO | 140 patents Modular ceiling-grid lighting systems with integrated edge-lit optics and configurable light distribution | — |
| 37 | Mona Lee Provider of solar photovoltaic modules | $3M | 32 mo ago | — | 2022 | Walid Halty Co-Founder & CEO | — | — |
| 38 | Stellaris Solar Module Manufacturing | $3M | 215 mo ago | — | 2005 | Lee Johnson Co-Founder & VP | 27 patents Integrated solar panel mounting systems with structural electrical interconnects and ladder inverters | — |
| 39 | Amperion Provider of electricity | $3M | 216 mo ago | 10 | 2001 | — | 53 patents Broadband powerline communication and RF coupling for utility grid data transmission | — |
| 40 | CAMX Power Manufacturer of dry or wet primary batteries | $3M | 71 mo ago | — | 2014 | Kenan Sahin Founder | 138 patents High‑energy, long‑life lithium‑ion battery cathodes and advanced electrolytes | — |
| 41 | PanelClaw Makes mounting systems for flat roof and ground mount applications. | $2M | 187 mo ago | 33 | 2007 | — | 65 patents Photovoltaic module mounting hardware and high‑current conductor management clips. | — |
| 42 | Takachar Developer of portable systems converting agricultural and forest residues into bioproducts | $2M | 46 mo ago | 10 | 2018 | Vidyut Mohan Co-Founder & CEO | 16 patents Modular multi-chamber biomass pyrolysis/torrefaction reactors with advanced control systems | 1 expansion |
| 43 | Bright Spot Automation Solar PV testing and automation solutions for enhanced module performance | $2M | 12 mo ago | — | 2014 | Rob Janoch CEO | — | 1 launch |
| 44 | Wing Power Energy Developer of wind powered micro-grids | $2M | 154 mo ago | 11 | 2010 | Harry Ruda CEO | — | — |
| 45 | The New England Hydropower Provider of Christian radio broadcasting services | $1M | 78 mo ago | 8 | 2011 | Michael Kerr Co-Founder and Managing Principal | — | — |
| 46 | Mass Megawatts Wind Power Green energy solutions provider specializing in wind and solar power systems | $1M | 64 mo ago | 3 | 1997 | — | — | — |
| 47 | Littoral Power Systems Designer & Manufacturer of hydropower and renewable energy equipment | $1M | 9 mo ago | 10 | 2014 | David Duquette CEO | — | — |
| 48 | Resonant Energy Solar installation company | $520K | 38 mo ago | 26 | 2016 | Ben Underwood Co-CEO & Founder | — | 1 job opening · 1 partnership |
| 49 | VesprSolar Provider of solar panel installation services | $505K | 43 mo ago | 10 | 2016 | — | — | 1 partnership |
| 50 | Pecos Wind Power Developer of wind turbines | $325K | 21 mo ago | 6 | 2016 | Joshua Groleau Co-Founder & CEO | — | — |
Top 12 Energy companies in Massachusetts
#1
Series B · Cambridge, Massachusetts · founded 2018 · 151 employees$2.1Braised▾
Provider of tokamak nuclear fusion reactors. It uses rare-earth barium copper oxide in high-field superconducting magnets for the working of compact fusion reactors.
- Aug 2025Series B$863M
- Dec 2021Series B$1.8B
- Mar 2021Grant (prize money)$1.5M
- May 2020Series A$84M
#2
Public · Cambridge, Massachusetts · founded 1878$250Mraised▾
Provider of technologies and services for the electric power industry. It offers an array of solutions across power generation, electrification, and grid infrastructure. These offerings include equipment, software, and related services designed to support the evolving needs of the energy sector. The company focuses on assisting clients with their energy transition goals through its various technology portfolios.
#3
Series A · Cambridge, Massachusetts · founded 2024$6.6Mraised▾
Provider of oil & gas exploration and production services
- Mar 2026Series A$14.6M
- May 2024Seed$6M
- Feb 2024Seed$625K
#4
Public · Framingham, Massachusetts · founded 2000 · 1126 employees$39.9Mraised▾
Developer of energy efficiency, storage, and renewable natural gas
- Oct 2025Grant (prize money)$39.9M
#5
Series A · Cambridge, Massachusetts · founded 2025$4.1Mraised▾
Developer of sustainable power grids for high-value power projects. It has expertise in the origination and development of high-value power projects. It is focused on advancing solutions for a low-carbon power grid.
- Jan 2026Series A$4.1M
#6
Series C · Somerville, Massachusetts · founded 2017 · 98 employees$175.9Mraised▾
Dandelion Energy is a geothermal energy solutions provider, offering high-performance, earth-powered heating and cooling systems for residential customers. The company's innovative technology enables cost-effective and sustainable energy solutions. With a focus on environmental sustainability, Dandelion Energy aims to transform the heating and cooling industry.
#7
Seed · Chelmsford, Massachusetts · founded 2022 · 6 employees$8.3Mraised▾
Developer of anchoring solutions for floating offshore wind and marine energy. The organization provides anchoring systems that allow for mooring configurations in all soils. It employs engineers and business development specialists to create technological solutions. The company focuses on transitioning ocean and marine systems technologies into the commercial market.
- Aug 2025Grant (prize money)$999.3K
- Dec 2024Seed$2.2M
- Dec 2024Grant (prize money)$3.5M
- Jul 2023Grant (prize money)$1.6M
#8
Series B · Massachusetts · founded 2019 · 34 employees$35.9Mraised▾
Developer of non-renewable energy based power projects
- Jan 2025Series B$75M
- Jul 2023Series A$24.9M
- Mar 2021Series A$11M
#9
Series A · Northampton, Massachusetts · founded 2020 · 7 employees$7.3Mraised▾
Design and build energy density ultra capacitors that will stabilize electrical grids
- Jul 2025Series A$9.5M
- Jul 2024Series A$5.2M
- Sep 2023Seed$2.1M
#10
Series C · Cambridge, Massachusetts · founded 2015 · 64 employees$27.5Mraised▾
Provider of solar asset management platform using aerial and sensor data. The platform analyzes images to conduct root cause analysis and direct operations and maintenance efforts. The platform digitally reconstructs solar plants in a map-based interface enriched with data. Autonomous drones investigate site conditions and equipment, automating visual investigations. A mobile application allows technicians to access remediation context, even offline.
- Dec 2024Series C$35M
- Apr 2022Series B$22M
- Oct 2020Series A$100K
- Aug 2020Series A$5M
#11
Seed · Cambridge, Massachusetts · founded 2022 · 2 employees$9.7Mraised▾
Developer of ultra-thin, lightweight, flexible, low-cost solar cells. The company focuses on enabling any surface to generate solar energy. It utilizes novel manufacturing techniques and commodity materials to build solar cells for both established and emerging markets. The company aims to provide solutions for integrating solar technology into various applications, including roofing, canopies, vehicles, and electronics.
- May 2025Seed$1.3M
- May 2024Seed$5.6M
- Sep 2023Seed$3.6M
#12
Series A · Boston, Massachusetts · founded 2011 · 71 employees$5.5Mraised▾
Provider of solar financing services
- Jun 2025Series A$7.2M
- Oct 2024Conventional Debt$5M
- May 2024Conventional Debt$29.2M
- Feb 2024Grant (prize money)$6.6M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Energy Storage in Massachusetts is moving
A read on the academic research around Energy Storage in Massachusetts — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 166 papers.
MIT and UMass institutions dominate Massachusetts energy-storage research, focusing optimistically on advanced battery materials and technologies, with breakthroughs outpacing concerns.
- Massachusetts Institute of Technology124
- University of Massachusetts Lowell15
- University of Massachusetts Amherst14
- University of Massachusetts Dartmouth11
- Emmanuel College - Massachusetts3
- Electrolyte4→12
- Battery (electricity)5→11
- Electrode2→7
- Electrochemistry4→7
- Redox3→5
- Battery (electricity)1→10
- Process engineering1→3
- Electrochemistry3→5
- Cathode1→3
- Electrolyte1→12
- Battery (electricity)2→10