Best Environment Companies in Massachusetts, United States
The 240 best Environment 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 90 Environment companies
$38.2b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Environment companies in Massachusetts
| # | Company | Disclosed funding | Last round | Stage | Employees | 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 | Series B | 151 | Bob Mumgaard Co-Founder & CEO | 5 patents EBV-based diagnostic and therapeutic assays for chronic fatigue syndrome | 1 launch · 1 partnership |
| 2 | Poseidon Water Provider of seawater and water desalination services | $200M | 120 mo ago | Series C | 12 | — | — | — |
| 3 | Enel X Developer of utility-scale renewable energy projects | $168M | 65 mo ago | Acquired | 513 | — | — | — |
| 4 | Ogin Energy Affordable, clean energy solutions for everyone through innovative turbine technology | $96M | 150 mo ago | Series C | 108 | — | — | — |
| 5 | Amsc Powering smarter, cleaner energy solutions for grid and wind turbine technologies | $92M | 132 mo ago | Public | 328 328 → 510 (+55%) | Greg Yurek Founder | — | — |
| 6 | BlueWave Developer of solar and wind energy projects | $64M | 33 mo ago | Acquired | 58 | Sean Finnerty CEO | — | — |
| 7 | Heartland Water Technology Provider of wastewater treatment technology and services to industries | $49M | 51 mo ago | Series A | 42 | Earl Jones CEO | — | — |
| 8 | Colossus Provider of solar panel installation services | $41M | 53 mo ago | Series A | 200 | — | — | — |
| 9 | 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 | Public | 1,126 | David Anderson Co-Founder and Strategic Advisor | 4 patents Density-gradient separation systems for liquid-phase purification and biotech processing | — |
| 10 | Woodwell Climate Conducts climate science research and develops solutions 78Funding top 25%Growth top 35%Market top 39%Tech top 39% All 5 signals ▾Fundingtop 25% Growthtop 35% Markettop 39% Techtop 39% Globalbottom 33% Funding: Raised $37.3M across 54 rounds · 54 rounds over 22 yrs (2.5/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 78/100 | $37M | 13 mo ago | Funding Raised | 133 | — | — | — |
| 11 | Danotek Motion Technologies Real-time Hong Kong lottery results, data analysis, and transparent broadcasts | $36M | 177 mo ago | Series B | — | Daniel Gizaw President and CEO | — | — |
| 12 | Ecochlor Provider of water treatment technology services | $29M | 69 mo ago | Acquired | 35 35 → 23 (-34%) | — | — | — |
| 13 | 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 | Series C | 64 | Edward Obropta Co-Founder & CTO | 4 patents UAV‑based remote sensing and edge computing for precision agriculture crop monitoring | — |
| 14 | Desalitech Provider of drinking water and purification system | $25M | 138 mo ago | Acquired | 30 | Avi Efraty Co-Founder | — | — |
| 15 | Oasys water Provider of water treatment and filtration methods | $25M | 144 mo ago | Series B | 9 | Angela Co-Founder | 251 patents Advanced forward osmosis membranes and draw‑solvent recovery technologies | — |
| 16 | First Wind Wind Energy development company | $17M | 170 mo ago | Acquired | 201 | Tim Rosenzweig Co-Founder & Chief Financial Officer | — | — |
| 17 | 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 | Seed | 2 | Shiv Bhakta Co-Founder | — | — |
| 18 | Transatomic Developer of small modular reactor | $9M | 128 mo ago | Series A | 4 | Russ Wilcox Co-Founder and Board Director | — | — |
| 19 | Triton Anchor Developer of anchoring solutions for floating offshore wind and marine energy | $8M | 9 mo ago | Seed | 6 | Ross Haghighat CEO | — | — |
| 20 | Wind River Environmental Provider of municipal waste water management services | $7M | 108 mo ago | Acquired | 786 | — | — | 1 award |
| 21 | Solstice Community solar provider unlocking clean energy access and savings for all | $7M | 65 mo ago | Acquired | 55 | Sandhya Murali Co-Founder and COO | 2 patents Provides medical fiducial markers for image-guided surgery and diagnostics. | 1 expansion |
| 22 | Building Science Provider of building enclosure consulting, forensic investigations, and building performance services | $7M | 205 mo ago | Funding Raised | — | Joseph Lstiburek Founder & Principal | — | — |
| 23 | Environmental Operating Solutions Provider of wastewater treatment solutions | $6M | 191 mo ago | Acquired | 28 | — | — | 1 job opening |
| 24 | Sungage Financial Provider of solar financing services | $5M | 11 mo ago | Series A | 71 71 → 108 (+52%) | Sylvain Mansier Co-Founder & President | — | 1 job opening · 1 partnership |
| 25 | Infinium Manufacturer of wind turbines | $5M | 70 mo ago | Deadpooled | 7 | Adam C. Powell Co-Founder & CTO | 254 patents Carbon capture and conversion to low‑carbon fuels and hydrogen via electro‑chemical reactors | — |
| 26 | ESG Flo Provider of ESG data aggregation and reporting solutions | $5M | 31 mo ago | Seed | 6 | — | — | — |
| 27 | circe Provider of air management services | $5M | 21 mo ago | Seed | 20 | Milad Moshfeghian Co-Founder | — | — |
| 28 | ReGen Power Systems Developer of combustion engine to convert range of heat sources to produce power | $5M | 211 mo ago | Deadpooled | 11 | Ricardo Conde Founder & President | — | — |
| 29 | Yeloha Solar sharing | $4M | 134 mo ago | Deadpooled | 20 | — | — | — |
| 30 | 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 | Series A | — | William Bliss Co-Founder & Chief Development Officer | — | — |
| 31 | Mona Lee Provider of solar photovoltaic modules | $3M | 32 mo ago | Seed | — | Walid Halty Co-Founder & CEO | — | — |
| 32 | Stellaris Solar Module Manufacturing | $3M | 215 mo ago | Series A | — | Lee Johnson Co-Founder & VP | 27 patents Integrated solar panel mounting systems with structural electrical interconnects and ladder inverters | — |
| 33 | Thiozen Provider of clean hydrogen production systems from H2S waste streams. | $3M | 27 mo ago | Seed | 5 | Ajay Bawa Co-Founder | — | — |
| 34 | Greene Lyon Sustainable recycling technologies for precious metals and integrated circuits | $3M | 31 mo ago | Series A | 4 | — | 47 patents Thermal-fluid de‑soldering and acidic metal recovery for printed circuit board recycling | — |
| 35 | Veolia Provider of waste management solution | $2M | 124 mo ago | Acquired | 5,619 5,619 → 5,844 (+4%) | Frederic Van Heems President & CEO | — | — |
| 36 | Solectria Renewables Leading supplier of innovative commercial PV inverters and energy storage solutions | $2M | 177 mo ago | Acquired | — | James Worden Chief Executive Officer (CEO) | — | — |
| 37 | PanelClaw Makes mounting systems for flat roof and ground mount applications. | $2M | 187 mo ago | Acquired | 33 | — | 65 patents Photovoltaic module mounting hardware and high‑current conductor management clips. | — |
| 38 | Bright Spot Automation Solar PV testing and automation solutions for enhanced module performance | $2M | 12 mo ago | Funding Raised | — | Rob Janoch CEO | — | 1 launch |
| 39 | Elio Provider of climate change advisory services | $2M | 16 mo ago | Seed | 3 | Kami Krista Co-Founder & CEO | — | — |
| 40 | Green Ray Solar Provider of micro inverter incorporated PV panels and 3D printing services | $2M | 203 mo ago | Acquired | 51 | Miles C Russell CEO & President | — | — |
| 41 | Wing Power Energy Developer of wind powered micro-grids | $2M | 154 mo ago | Deadpooled | 11 | Harry Ruda CEO | — | — |
| 42 | Sustainability Roundtable Provider of strategic advisory and support services for sustainable business practices | $1M | 168 mo ago | Series A | 11 11 → 21 (+91%) | — | — | — |
| 43 | Mass Megawatts Wind Power Green energy solutions provider specializing in wind and solar power systems | $1M | 64 mo ago | Public | 3 | — | — | — |
| 44 | Resonant Energy Solar installation company | $520K | 38 mo ago | Funding Raised | 26 | Ben Underwood Co-CEO & Founder | — | 1 job opening · 1 partnership |
| 45 | VesprSolar Provider of solar panel installation services | $505K | 43 mo ago | Seed | 10 | — | — | 1 partnership |
| 46 | Drink Well Provider of drinking water services | $500K | 99 mo ago | Seed | 57 | Minhaj Chowdhury Co-Founder & CEO | — | — |
| 47 | Black Earth Compost Providing food waste hauling & processing in Boston, MA | $338K | 91 mo ago | Seed | 39 39 → 38 (-3%) | Conor Miller Founder | — | — |
| 48 | Pecos Wind Power Developer of wind turbines | $325K | 21 mo ago | Seed | 6 | Joshua Groleau Co-Founder & CEO | — | — |
| 49 | Opticomp Networks Developer of high-efficiency foldable and rollable solar modules for space and terrestrial applications | $320K | 132 mo ago | Funding Raised | — | John Farah Owner | — | — |
| 50 | inBalance Developer of solar and wind energy projects | $125K | 60 mo ago | Seed | 20 | Thomas Marge Co-Founder & CEO | — | — |
Top 12 Environment 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 · Framingham, Massachusetts · founded 2000 · 1126 employees$39.9Mraised▾
Developer of energy efficiency, storage, and renewable natural gas
- Oct 2025Grant (prize money)$39.9M
#3
Funding Raised · Falmouth, Massachusetts · founded 1985 · 133 employees$37.3Mraised▾
Conducts climate science research and develops solutions. This research focuses on the intersection of climate, people, and nature, aiming to inform policy and decision-making. The organization partners with communities and leaders globally to create impactful solutions for climate change. Their work utilizes various methods including field and laboratory science, remote sensing, and computer modeling. Collaboration is central to their approach, working with stakeholders across sectors to translate research into real-world action. The organization's strategic plan prioritizes projects with the highest potential for positive impact.
- May 2025Grant (prize money)$99.4K
- Mar 2025Grant (prize money)$2M
- Mar 2025Grant (prize money)$717.9K
- Feb 2025Grant (prize money)$993.8K
#4
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
#5
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
#6
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
#7
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
#8
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
#9
Funding Raised · Westford, Massachusetts · founded 2014$2.1Mraised▾
Solar PV testing and automation solutions for enhanced module performance. The company provides specialized manufacturing and measurement tools for the solar energy industry and photovoltaic researchers. They focus on improving module durability and performance through precision inspection and analysis. Their offerings span the complete PV value chain, from R&D to manufacturing to field testing, including electroluminescence, photoluminescence, and ultraviolet fluorescence imaging systems. They offer software solutions for system control, image capture, analysis, and reporting. They serve the entire Perovskite PV value chain with metrology tools implemented from R&D to product development to manufacturing to field testing. They provide customized solutions and support, tailoring hardware and software to fit customer needs. Their expertise includes defect imaging, durability testing, and failure analysis, contributing to the science of solar durability through research and innovation.
- May 2025Grant (prize money)$1.3M
- Jul 2017Grant (prize money)$600K
- Feb 2017Grant (prize money)$150K
#10
Seed · Boston, Massachusetts · founded 2020 · 3 employees$2Mraised▾
Provider of climate change advisory services
- Feb 2025Seed$2M
- 2021Seed—
#11
Seed · Boston, Massachusetts · founded 2021 · 20 employees$5Mraised▾
Provider of air management services
- Sep 2024Seed$5M
- Oct 2021Seed$1.6M
- 2021Seed—
#12
Acquired · Boston, Massachusetts · founded 2010 · 58 employees$64Mraised▾
Developer of solar and wind energy projects
- Sep 2023Conventional Debt$64M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Environment coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Massachusetts researches in environmental monitoring
MIT and UMass lead Massachusetts environmental-monitoring research, focusing predominantly on air and water quality with an optimistic tone (mean stance 0.38), accelerating sharply post-2020.
- Massachusetts Institute of Technology20
- University of Massachusetts Amherst4
- University of Massachusetts Dartmouth2
- Massachusetts Audubon Society2
- University of Massachusetts Boston2