Company lists · Data refreshed September 2026

Top 25 B2B venture capital firms based in Boston, United States

Name: B2B 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 27, 2026 127 companies tracked

RevenueBase identified 127 B2B venture capital firms headquartered in Boston, United States as of September 2026 and tracks 2,222 professional contacts across them, including 789 with verified work emails. Across the United States, New York is the largest hub for this category (554 companies); Boston has 127.

This list covers B2B 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 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

127Companies

2,222Contacts tracked

789Verified emails

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The 25 largest B2B venture capital firms based in Boston, United States

Ranked by team size

Top 25 of 127 B2B venture capital 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 B2B 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	PSG	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	513 contacts →
	Partial evidence “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Source: RevenueBase Database · checked Sep 27, 2026
2	Battery Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	211 contacts →
	Indirect evidence “Battery invests in potentially cutting-edge, category-defining businesses in markets including application software, IT infrastructure technologies, consumer-internet and mobile…” Source: RevenueBase Database · checked Sep 27, 2026
3	Third Rock Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	113 contacts →
	Indirect evidence “We discover, launch and build great companies based on bold ideas that meet at the intersection of science, strategy, business and medicine – where transformational science meets…” Source: RevenueBase Database · checked Sep 27, 2026
4	FA Technology Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	n/a	109 contacts →
	Strong evidence “FA Technology Ventures is an independent, established venture capital firm.” Source: RevenueBase Database · checked Sep 27, 2026
5	Underscore VC	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	75 contacts →
	Strong evidence “Underscore VC is a Boston-based venture capital firm backing bold B2B software entrepreneurs at pre-Seed and Seed.” Source: RevenueBase Database · checked Sep 27, 2026
6	Silversmith Capital Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	63 contacts →
	Partial evidence “Founded in 2015, Silversmith Capital Partners is a Boston-based growth equity firm with over $5 billion in capital under management.” Source: RevenueBase Database · checked Sep 27, 2026
7	Polaris Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	55 contacts →
	Indirect evidence “Exceptional entrepreneurs.” Source: RevenueBase Database · checked Sep 27, 2026
8	Openview	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	47 contacts →
	Strong evidence “OpenView is a venture capital firm on a mission to change the way the world works.” Source: RevenueBase Database · checked Sep 27, 2026
9	Glasswing Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
10	Companyon Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	n/a	41 contacts →
	Partial evidence “We back just a few fast-moving, founder-led B2B startups each year.” Source: RevenueBase Database · checked Sep 27, 2026
11	M33 Growth	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	38 contacts →
	Partial evidence “M33 Growth is a venture and growth stage investment firm that seeks to partner with founders and CEOs to rapidly scale their companies and break through as industry leaders.” Source: RevenueBase Database · checked Sep 27, 2026
12	PJC	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	n/a	38 contacts →
	Strong evidence “PJC is an early-stage venture capital firm focused on investing in, supporting, and building relationships with entrepreneurs who are creating the future.” Source: RevenueBase Database · checked Sep 27, 2026
13	Venture Guides	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	36 contacts →
	Partial evidence “Venture Guides is an early-stage infrastructure software investment firm with a unique team based approach that has resulted in over 80% of portfolio companies generating positive…” Source: RevenueBase Database · checked Sep 27, 2026
14	Conjoin Group	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	201-500	36 contacts →
	Strong evidence “The ConJoin Group aligns with Venture Capital and Private Equity firms by investing our own capital,$250M in committed funds, and delivering a suite of services designed to…” Source: RevenueBase Database · checked Sep 27, 2026
15	Mendoza Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
16	Elephant	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
17	Digital Fuel Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	26 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 27, 2026
18	Guidepost Growth Equity	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	11-50	25 contacts →
	Indirect evidence “Guidepost Growth Equity is a leading growth equity firm that partners with technology companies offering innovative solutions in large, dynamic markets including tech-enabled…” Source: RevenueBase Database · checked Sep 27, 2026
19	Equal Opportunity Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	21 contacts →
	Partial evidence “EO Ventures invests in early-stage businesses that increase opportunity in America.” Source: RevenueBase Database · checked Sep 27, 2026
20	January Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
21	Techrupt Innovations	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	19 contacts →
	Strong evidence “We are a venture studio building and investing in transformative companies across ed tech, AI, consumer products, and B2B SaaS.” Source: RevenueBase Database · checked Sep 27, 2026
22	Wavecrest Growth Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1-10	17 contacts →
	Partial evidence “Wavecrest Growth Partners is a growth equity firm focused on investing in and partnering with leading B2B software and technology-enabled services companies.” Source: RevenueBase Database · checked Sep 27, 2026
23	Massmutual Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
24	Saturn Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
25	CUE Ball Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 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: B2B 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 B2B venture capital firms.
Partial evidence: Its own public description names part of B2B 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 B2B 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 127 B2B venture capital firms based in Boston, United States

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B2B venture capital firms based in Boston, United States at a glance

As of Sep 27, 2026

35.5%Verified-email coverage

17.5Average contacts per company

1-10Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 127 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 B2B 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 “B2B 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 B2B 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 B2B 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, 789 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.

B2B 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 B2B 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 B2B venture capital firms are there based in Boston, United States?

RevenueBase identified 127 B2B 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?

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

Which city in the United States has the most B2B venture capital firms?

New York leads the United States with 554 headquartered companies, followed by San Francisco (500) and Palo Alto (169). Boston has 127.

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 789 verified decision-maker contacts tracked across these 127 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.