Company lists · Data refreshed September 2026

Top 25 Impact investing venture capital firms based in Boston, United States

Name: Impact investing venture capital 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 28, 2026 70 companies tracked

RevenueBase identified 70 impact investing venture capital firms headquartered in Boston, United States as of September 2026 and tracks 795 professional contacts across them, including 245 with verified work emails. Across the United States, New York is the largest hub for this category (328 companies); Boston has 70.

This list covers impact investing venture capital 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 28, 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 28, 2026 86% judged on-target in blind review

70Companies

795Contacts tracked

245Verified emails

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The 25 largest impact investing venture capital firms based in Boston, United States

Ranked by team size

Top 25 of 70 impact investing venture capital firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to impact investing venture capital 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	FA Technology Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	n/a	109 contacts →
	Strong evidence “FA Technology Ventures is an independent, established venture capital firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	Flare Capital Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	85 contacts →
	Strong evidence “Flare Capital Partners is the leading healthcare technology venture capital firm advancing innovation-driven companies to improve positive health outcomes, broaden care access…” Source: RevenueBase Database · checked Sep 28, 2026
3	Polaris Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	55 contacts →
	Indirect evidence “Exceptional entrepreneurs.” Source: RevenueBase Database · checked Sep 28, 2026
4	Clean Energy Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 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 28, 2026
5	Glasswing Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	45 contacts →
	Strong evidence “Glasswing Ventures is an early stage venture capital firm investing in the next generation of AI and frontier technology startups that are enabling the rise of the intelligent…” Source: RevenueBase Database · checked Sep 28, 2026
6	Mendoza Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	n/a	34 contacts →
	Partial evidence “Firm overview Mendoza Ventures is an early-stage and growth venture fund based in Boston.” Source: RevenueBase Database · checked Sep 28, 2026
7	Elephant	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	27 contacts →
	Strong evidence “Elephant is a venture capital firm focused on investing in fast-growing, capital-efficient technology companies.” Source: RevenueBase Database · checked Sep 28, 2026
8	Equal Opportunity Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	21 contacts →
	Partial evidence “EO Ventures invests in early-stage businesses that increase opportunity in America.” Source: RevenueBase Database · checked Sep 28, 2026
9	January Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	21 contacts →
	Partial evidence “January Ventures is a VC fund focused on angel/pre-seed in the US & Europe.” Source: RevenueBase Database · checked Sep 28, 2026
10	Spring Lane Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial 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 28, 2026
11	Conservation Resources	Partial evidence	Boston, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Conservation Resources is an impact investment organization founded in 2004.” Source: RevenueBase Database · checked Sep 28, 2026
12	Massmutual Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Our Culture: At MMV, we’re a team of fair, dedicated investors and operators who put integrity, collaboration, and teamwork at the forefront of what we do.” Source: RevenueBase Database · checked Sep 28, 2026
13	Saturn Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	15 contacts →
	Strong evidence “Since 1993, Saturn has been an opportunistic investor that takes a hands-on approach to investing in proprietary seed and early stage venture capital opportunities located…” Source: RevenueBase Database · checked Sep 28, 2026
14	CUE Ball Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Cue Ball is a venture capital firm built on a distinct, human capital-centric philosophy.” Source: RevenueBase Database · checked Sep 28, 2026
15	Health Innovation Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	13 contacts →
	Strong evidence “HIC is a pediatric and women’s health focused venture capital impact fund.” Source: RevenueBase Database · checked Sep 28, 2026
16	Asymmetric	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	13 contacts →
	Indirect evidence “We partner with disruptive technology companies across software, marketplaces, fintech, and digital health by offering founders, early investors, and limited partners the most…” Source: RevenueBase Database · checked Sep 28, 2026
17	Liquidmetal Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Strong evidence “LiquidMetal Ventures is a Boston based, early-stage focused venture capital fund focusing on Energy & Sustainability, Biotech & Healthcare and AI & Robotics, with a mission…” Source: RevenueBase Database · checked Sep 28, 2026
18	Wave Equity Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect 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 28, 2026
19	Rockport Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Strong 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 28, 2026
20	Romulus Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “We're hiring!” Source: RevenueBase Database · checked Sep 28, 2026
21	Jffventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Strong evidence “JFFVentures (JFFV) is the nation’s leading impact venture fund specializing exclusively on emerging future of work and workforce development technologies enabling the economic…” Source: RevenueBase Database · checked Sep 28, 2026
22	Innospark Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Strong evidence “Innospark Ventures is an early-stage venture capital firm that invests in AI-native companies solving previously intractable problems across healthcare, life sciences, and…” Source: RevenueBase Database · checked Sep 28, 2026
23	Accelhub Venture Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “AccelHUB Venture Partners invests in disruptive international technologies and provides the guidance and leadership to launch them into the global market and reach a strong exit.” Source: RevenueBase Database · checked Sep 28, 2026
24	Iaso Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “Iaso Ventures is a venture capital firm located in Boston.” Source: RevenueBase Database · checked Sep 28, 2026
25	Advaita Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Strong evidence “We invest in extreme outliers in growth tech startup in venture capital.” Source: RevenueBase Database · checked Sep 28, 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: impact investing venture capital 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 impact investing venture capital firms.
Partial evidence: Its own public description names part of impact investing venture capital firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name impact investing venture capital 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 25 of 70 impact investing venture capital firms based in Boston, United States

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Impact investing venture capital firms based in Boston, United States at a glance

As of Sep 28, 2026

30.8%Verified-email coverage

11.4Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 70 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 impact investing venture capital 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 “impact investing venture capital 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 impact investing venture capital 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 impact investing venture capital 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, 245 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 28, 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.

Impact investing venture capital 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 impact investing venture capital 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 impact investing venture capital firms are there based in Boston, United States?

RevenueBase identified 70 impact investing venture capital 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?

FA Technology Ventures, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most impact investing venture capital firms?

New York leads the United States with 328 headquartered companies, followed by San Francisco (302) and Los Angeles (112). Boston has 70.

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 245 verified decision-maker contacts tracked across these 70 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 28, 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.