Company lists · Data refreshed September 2026

Top 23 Clean energy investment firms based in Boston, United States

Name: Clean energy investment firms based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 38 companies tracked

RevenueBase identified 38 clean energy investment firms headquartered in Boston, United States as of September 2026 and tracks 737 professional contacts across them, including 431 with verified work emails. Across the United States, New York is the largest hub for this category (134 companies); Boston has 38.

This list covers clean energy investment firms headquartered in Boston, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

38Companies

737Contacts tracked

431Verified emails

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The 23 largest clean energy investment firms based in Boston, United States

Ranked by team size

Top 23 of 38 clean energy investment firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy investment firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Longroad Energy	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	210 contacts →
	Partial evidence “Founded in 2016, Longroad Energy is a U.S-based energy company focused on developing and operating wind, solar, storage, and data center projects throughout North America.” Source: RevenueBase Database · checked Sep 27, 2026
2	Bluewave	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	125 contacts →
	Strong evidence “BlueWave is a mission-driven clean energy developer, owner, and operator building solar and energy storage solutions that strengthen the electric grid and deliver long-term grid…” Source: RevenueBase Database · checked Sep 27, 2026
3	Arclight Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	79 contacts →
	Indirect evidence “ArcLight is a leading infrastructure investor which has been investing in critical electrification infrastructure since its founding in 2001.” Source: RevenueBase Database · checked Sep 27, 2026
4	Resurety	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	65 contacts →
	Strong evidence “Resurety is the only clean energy industry partner to bring together actionable market insights and groundbreaking transaction tools in one seamless ecosystem.” Source: RevenueBase Database · checked Sep 27, 2026
5	Clean Energy Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	54 contacts →
	Strong evidence “Clean Energy Ventures is a venture capital firm focused on investing in companies commercializing disruptive advanced energy technologies and business model innovations that can…” Source: RevenueBase Database · checked Sep 27, 2026
6	Kearsarge Energy	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	26 contacts →
	Partial evidence “Kearsarge Energy is a vertically integrated renewable energy project development and finance company that owns and operates its projects.” Source: RevenueBase Database · checked Sep 27, 2026
7	MCJ	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	25 contacts →
	Partial evidence “MCJ is an early-stage fund for the energy and industry transition and the inevitable impacts of climate change.” Source: RevenueBase Database · checked Sep 27, 2026
8	CCA Group, LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	18 contacts →
	Indirect evidence “CCA Group, LLC is a privately held boutique financial advisory firm based in Boston that provides premier capital markets and advisory services to companies active primarily in…” Source: RevenueBase Database · checked Sep 27, 2026
9	Spring Lane Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	18 contacts →
	Indirect evidence “Spring Lane Capital offers a new approach to faster growth for companies that deploy smaller-scale projects and equipment.” Source: RevenueBase Database · checked Sep 27, 2026
10	Conservation Resources	Partial evidence	Boston, United StatesHQ checked Sep 27, 2026	11-50	16 contacts →
	Partial evidence “Conservation Resources is an impact investment organization founded in 2004.” Source: RevenueBase Database · checked Sep 27, 2026
11	Wave Equity Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	12 contacts →
	Strong evidence “Founded in 2013, WAVE Equity Partners is an independent sustainability-focused private investment firm that makes investments in early-growth companies whose proven clean…” Source: RevenueBase Database · checked Sep 27, 2026
12	Rockport Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	12 contacts →
	Partial evidence “RockPort Capital is a multi-stage venture capital firm that invests in the areas of alternative and traditional energy, mobility, and sustainability.” Source: RevenueBase Database · checked Sep 27, 2026
13	Energetic Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	8 contacts →
	Strong evidence “Energetic Capital was created to catalyze deployment of renewable energy with a focus on sub-investment grade and unrated credit risks.” Source: RevenueBase Database · checked Sep 27, 2026
14	Windsail Capital Group LLC	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	5 contacts →
	Strong evidence “WindSail Capital Group is a leading provider of growth capital to companies within the clean energy economy.” Source: RevenueBase Database · checked Sep 27, 2026
15	Jbri Holdings	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	4 contacts →
	Strong evidence “JBRI Holdings is a Real Estate, Clean Energy and Digital investment organization with assets throughout the Northeast United States.” Source: RevenueBase Database · checked Sep 27, 2026
16	Energy Management, INC	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	4 contacts →
	Strong evidence “EMI is a privately held energy company with a more than 40-year track record of developing, financing, constructing and operating clean energy projects.” Source: RevenueBase Database · checked Sep 27, 2026
17	North River Capital Advisors	Strong evidence	Boston, United StatesHQ checked Sep 27, 2026	1-10	3 contacts →
	Strong evidence “North River Capital Advisors is the leader in providing investment banking services to small and mid cap companies in the Energy Transition + Sustainability Sector.” Source: RevenueBase Database · checked Sep 27, 2026
18	Accelr8 Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	3 contacts →
	Partial evidence “AccelR8 is an investment firm investing to accelerate the transition to a decarbonized and resilient economy.” Source: RevenueBase Database · checked Sep 27, 2026
19	Bostonia Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	3 contacts →
	Strong evidence “Bostonia provides investment banking, capital markets, and asset ownership services for real estate, energy, and sustainable infrastructure assets and development projects.” Source: RevenueBase Database · checked Sep 27, 2026
20	Rivermoor Energy	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	3 contacts →
	Strong evidence “Rivermoor Energy provides clean energy development, planning, financing, and investment solutions to corporate, commercial, utility, government and institutional (higher…” Source: RevenueBase Database · checked Sep 27, 2026
21	Cricetus Felix Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	1 contacts →
	Partial evidence “Impact Investing at the Fulcrum of Technology & Environment ® Renewable Energy \| Energy Access \| Smart Grid \| Smart Buildings \| IOT \| Robotics \| Artificial Intelligence \| AR/VR \|…” Source: RevenueBase Database · checked Sep 27, 2026
22	Climate Venture Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	1 contacts →
	Indirect evidence “Climate Venture Partners is currently raising a pre-seed round for Applied Bioplastics.” Source: RevenueBase Database · checked Sep 27, 2026
23	Mpactful Ventures	Partial evidence	Boston, United StatesHQ checked Sep 27, 2026	1-10	1 contacts →
	Partial evidence “Mpactful Ventures is a public benefit investment company focused on supporting startups and other initiatives that play a vital role in reversing the adverse effects of climate…” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: clean energy investment firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names clean energy investment firms.
Partial evidence: Its own public description names part of clean energy investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy investment firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 23 of 38 clean energy investment firms based in Boston, United States

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Clean energy investment firms based in Boston, United States at a glance

As of Sep 27, 2026

58.5%Verified-email coverage

19.4Average contacts per company

11-50Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 38 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among clean energy investment firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Boston, United States whose own description of what they do matches “clean energy investment firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names clean energy investment firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among clean energy investment firms, and records with no verified work email. Companies headquartered outside Boston are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 431 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Clean energy investment firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names clean energy investment firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many clean energy investment firms are there based in Boston, United States?

RevenueBase identified 38 clean energy investment firms headquartered in Boston, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Longroad Energy, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most clean energy investment firms?

New York leads the United States with 134 headquartered companies, followed by Houston (70) and San Francisco (59). Boston has 38.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 431 verified decision-maker contacts tracked across these 38 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.