Company lists · Data refreshed September 2026

Top 23 Impact venture capital firms based in Boston, United States

Name: Impact 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 3, 2026 130 companies tracked

RevenueBase identified 130 impact venture capital firms headquartered in Boston, United States as of September 2026 and tracks 1,724 professional contacts across them, including 626 with verified work emails. New York is the largest hub.

This list covers impact 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

130Companies

1,724Contacts tracked

626Verified emails

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The 23 largest impact venture capital firms based in Boston, United States

Ranked by team size

Top 23 of 130 impact venture capital firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names impact venture capital firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	RA Capital ManagementPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	201-500	242
	“Founded in 2004, RA Capital Management is an active, multi-stage investment manager dedicated to evidence-based, science-led investing in public and private healthcare, life…” Source: company website · checked Sep 3, 2026
2	FA Technology VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	n/a	109
	“FA Technology Ventures is an independent, established venture capital firm.” Source: company website · checked Sep 3, 2026
3	Flare Capital PartnersStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	84
	“Flare Capital Partners is the leading healthcare technology venture capital firm advancing innovation-driven companies to improve positive health outcomes, broaden care access…” Source: company website · checked Sep 3, 2026
4	Underscore VCStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	73
	“Underscore VC is a Boston-based venture capital firm backing bold B2B software entrepreneurs at pre-Seed and Seed.” Source: company website · checked Sep 3, 2026
5	Clean Energy VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	53
	“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: company website · checked Sep 3, 2026
6	Glasswing VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	44
	“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: company website · checked Sep 3, 2026
7	Erez CapitalPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	n/a	40
	“VC + management firm accelerating AI, healthcare, fintech & deeptech startups with capital and strategic support.” Source: company website · checked Sep 3, 2026
8	Companyon VenturesIndirect evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	n/a	40
	“We back just a few fast-moving, founder-led B2B startups each year.” Source: company website · checked Sep 3, 2026
9	PJCStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	n/a	37
	“PJC is an early-stage venture capital firm focused on investing in, supporting, and building relationships with entrepreneurs who are creating the future.” Source: company website · checked Sep 3, 2026
10	Mendoza VenturesPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	n/a	32
	“Firm overview Mendoza Ventures is an early-stage and growth venture fund based in Boston.” Source: company website · checked Sep 3, 2026
11	ElephantStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	28
	“Elephant is a venture capital firm focused on investing in fast-growing, capital-efficient technology companies.” Source: company website · checked Sep 3, 2026
12	Digital Fuel CapitalIndirect evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	26
	“We are passionate about digital marketing: the marriage of science and art, the ability to test and innovate rapidly and the opportunities to serve distinct consumer interests and…” Source: company website · checked Sep 3, 2026
13	MCJPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	23
	“MCJ is an early-stage fund for the energy and industry transition and the inevitable impacts of climate change.” Source: company website · checked Sep 3, 2026
14	Learnlaunch Fund AcceleratorPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	23
	“LearnLaunch Fund + Accelerator is an impact-driven VC fund and accelerator that invests in and supports entrepreneurs on the mission to transform education positively.” Source: company website · checked Sep 3, 2026
15	January VenturesPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	22
	“January Ventures is a VC fund focused on angel/pre-seed in the US & Europe.” Source: company website · checked Sep 3, 2026
16	Equal Opportunity VenturesPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	19
	“EO Ventures invests in early-stage businesses that increase opportunity in America.” Source: company website · checked Sep 3, 2026
17	Techrupt InnovationsPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	51-200	19
	“We are a venture studio building and investing in transformative companies across ed tech, AI, consumer products, and B2B SaaS.” Source: company website · checked Sep 3, 2026
18	Spring Lane CapitalPartial evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	17
	“Spring Lane Capital offers a new approach to faster growth for companies that deploy smaller-scale projects and equipment.” Source: company website · checked Sep 3, 2026
19	Visible HandsStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	17
	“Visible Hands is a pre-seed venture capital firm, backing the overlooked, but formidable founders who are transforming the future.” Source: company website · checked Sep 3, 2026
20	Conservation ResourcesPartial evidence	Boston, United StatesHQ checked Sep 3, 2026	11-50	16
	“Conservation Resources is an impact investment organization founded in 2004.” Source: company website · checked Sep 3, 2026
21	Suffolk TechnologiesStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	15
	“Suffolk Technologies is a leading venture capital platform investing in ConTech, PropTech and InfraTech startups transforming the $12T built environment sector.” Source: company website · checked Sep 3, 2026
22	Rose Park AdvisorsIndirect evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	11-50	14
	“Rose Park Advisors is a specialized investment firm, co-founded by Clayton and Matthew Christensen, focused on making investments in companies whose strategies are based on…” Source: company website · checked Sep 3, 2026
23	Saturn PartnersStrong evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	1-10	14
	“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: company website · checked Sep 3, 2026

Showing 23 of 130 impact venture capital firms based in Boston, United States

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

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 558 HQs

Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 130 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 venture capital firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 venture capital firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among impact 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 an evidence 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, 626 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 3, 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 venture capital firms by metro in the United States

Frequently asked

How many impact venture capital firms are there based in Boston, United States?

RevenueBase identified 130 impact 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?

RA Capital Management, headquartered in Boston, tops this list with the largest team on record.

Which city has the most impact venture capital firms?

New York leads with 558 headquartered companies, followed by San Francisco (518) and Los Angeles (180).

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 626 verified decision-maker contacts tracked across these 130 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 3, 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 SmartSearch, 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.