Best Energy Companies in Boston, United States
The 68 best Energy companies in Boston, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Enel X.
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 Boston
| # | Company | Last round | Disclosed funding | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | alturus Alturus provides capital and structured solutions for energy efficiency. | — | — | 11 | Charles Esdaile Co-Founder | — | — | — |
| 2 | ArcLight Infrastructure fund focused on energy investments | — | — | 142 142 → 85 (-40%) | Dan Revers Founder & Managing Partner | WordPressMySQLPHP+23 | — | 1 partnership |
| 3 | asbeco ASBECO offers material handling systems and installation, control engineering, equipment sales, and… | — | — | 35 | — | — | — | — |
| 4 | atlantic power corporation Atlantic Power Corporation is engaged in power generation through hydro, natural gas, biomass, and coal fired… | — | — | 166 | Jim Moore CEO | DrupalApple iCloud MailMicrosoft 365+11 | — | — |
| 5 | Beacon Energy Provider of construction, contracting, and consulting for storage tanks and pipelines | — | — | 39 | — | — | — | — |
| 6 | Boreal Renewable Renewable energy solutions: wind, photovoltaic, and solar thermal project development | — | — | — | Tom Michelman Co-Founder | — | — | — |
| 7 | boston energy trading and marketing Boston Energy Trading and Marketing provide asset management, energy storage optimization, trading, gas… | — | — | 72 | — | PHPBootstrapGoogle Cloud+14 | — | 6 job openings |
| 8 | breiter planet properties Solar development and investment firm | — | — | 4 | — | — | — | — |
Top 12 Energy companies in Boston
#1
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
#2
Acquired · Boston, Massachusetts · founded 2010 · 58 employees$64Mraised▾
Developer of solar and wind energy projects
- Sep 2023Conventional Debt$64M
#3
Acquired · Boston, Massachusetts · founded 2001 · 513 employees$168Mraised▾
Developer of utility-scale renewable energy projects
- Jan 2021Grant (prize money)$279K
- Sep 2020Grant (prize money)—
- Feb 2020Grant (prize money)$1M
- Jun 2019Grant (prize money)$418.7K
#4
Series A · Boston, Massachusetts · founded 2013 · 21 employees$41.8Mraised▾
Energy finance solutions
- Aug 2022Series A—
- Oct 2017Series A$40M
- Jul 2017Seed$880K
- Feb 2015Seed$125K
#5
Series D · Boston, Massachusetts · founded 2008 · 145 employees$106.5Mraised▾
Provider of online guides and resources for home living, well-being, and career development. It offers practical advice and how-to instructions on various topics, including housekeeping, cooking, self-care, motivation, financial management, and career planning. The platform aims to empower individuals to improve their lives through readily accessible information and actionable steps. Content covers diverse areas, from cleaning tips and budget management to career guidance and relationship advice. The goal is to provide users with the tools and knowledge to achieve personal growth and a more fulfilling life.
- Jan 2016Series D$4.2M
- Dec 2015Series D$1M
- Sep 2015Grant (prize money)$250K
- Apr 2015Series D$12.5M
#6
Seed · Boston, Massachusetts · founded 2022$3.2Mraised▾
Provider of solar photovoltaic modules
#7
Series B · Boston, Massachusetts · founded 2020 · 62 employees$15Mraised▾
Manufacturer of power distribution equipments
- Jun 2022Series B$15M
#8
Seed · Boston, Massachusetts · founded 2011 · 127 employees$4.4Mraised▾
Provider of sustainable biofuels and carbon offset solutions. It develops and supplies sustainable aviation fuel (SAF), renewable diesel, and renewable naphtha. The company offers book-and-claim solutions, allowing businesses to reduce their carbon footprint through verified emissions reductions without physical fuel delivery. These solutions are designed to help various industries, including aviation, shipping, and steel, lower their emissions while maintaining economic growth. A focus on transparent and traceable carbon accounting methodologies ensures the credibility of its offerings.
- May 2022Grant (prize money)$2M
- Feb 2014Seed$4.4M
- Jun 2012Grant (prize money)$18.3K
- Sep 2011Grant (prize money)$255.5K
#9
Seed · Boston, Massachusetts · founded 2020 · 8 employees$5.2Mraised▾
Provider of renewable energy services
- Jul 2022Seed$5.2M
#10
Acquired · Boston, Massachusetts · founded 2016 · 55 employees$7.4Mraised▾
Community solar provider unlocking clean energy access and savings for all. This organization focuses on expanding access to solar energy through community solar gardens, enabling individuals and businesses to benefit from solar power without needing to install panels on their property. They connect subscribers to local solar projects, providing credits on their electricity bills based on the solar garden's production. This model promotes affordable, accessible, and responsible energy consumption, supporting a cleaner and more equitable energy grid. They offer a platform for individuals, households, developers, and businesses to participate in the clean energy transition, fostering a community-driven approach to sustainability. The organization emphasizes ease of enrollment, cost savings, and environmental impact, making solar energy accessible to a broader audience. They provide customer support, educational resources, and partnership opportunities to further their mission of equitable access to clean energy.
- Jan 2021Seed$3.1M
- Oct 2020Seed$100K
- Aug 2020Conventional Debt$3.1M
- May 2020Conventional Debt$967.5K
#11
Acquired · Boston, Massachusetts · founded 2002 · 201 employees$17.4Mraised▾
First Wind is an independent North American wind energy company focused exclusively on the development, ownership and operation of wind farms. It currently focuses on developing wind farms in the northeastern and western regions of the U.S. and in Hawaii. In Nov. 2014, it was acquired for $2.4B by Sunedison and TerraForm Power.
- Mar 2012Conventional Debt$236M
- Dec 2011Conventional Debt$210M
- Dec 2010Conventional Debt$76M
- Jul 2009Series B$17.4M
#12
Funding Raised · Boston, Massachusetts · founded 2016 · 26 employees$520.3Kraised▾
Solar installation company
- Apr 2023Conventional Debt$75K
- Jun 2021Conventional Debt$445.3K
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
What Boston researches in energy storage
- Boston University6
- Boston College5
- University of Massachusetts Boston3
- Boston Applied Technologies1
- Boston Children\'s Hospital1
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.