Company lists · Data refreshed September 2026

Top 25 Api and platform venture capital companies based in the United States

Name: Api and platform venture capital companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 1,936 companies tracked

RevenueBase identified 1,936 api and platform venture capital companies headquartered in the United States as of September 2026 and tracks 32,331 professional contacts across them, including 9,285 with verified work emails. San Francisco is the largest hub.

This list covers api and platform venture capital companies headquartered in the 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

1,936Companies

32,331Contacts tracked

9,285Verified emails

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The 25 largest api and platform venture capital companies based in the United States

Ranked by team size

Top 25 of 1,936 api and platform venture capital companies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to api and platform venture capital companies: 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	Techstars	Indirect evidence	New York City, NY, United StatesHQ checked Sep 27, 2026	n/a	1,803 contacts →
	Indirect evidence “Techstars helps founders scale their startups into world-changing businesses.” Source: RevenueBase Database · checked Sep 27, 2026
2	ACCEL	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 27, 2026	n/a	981 contacts →
	Strong evidence “Accel is a global venture capital firm that is the first partner to exceptional teams everywhere, from inception through all phases of private company growth.” Source: RevenueBase Database · checked Sep 27, 2026
3	Andreessen Horowitz	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	201-500	932 contacts →
	Strong evidence “Founded in 2009 by Marc Andreessen and Ben Horowitz, Andreessen Horowitz (known as "a16z") is a venture capital firm that backs bold entrepreneurs building the future through…” Source: RevenueBase Database · checked Sep 27, 2026
4	Lvlup Ventures	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	610 contacts →
	Strong evidence “LvlUp Ventures is a global venture capital firm investing in and accelerating early-stage & late-stage startups.” Source: RevenueBase Database · checked Sep 27, 2026
5	Primary Venture Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	51-200	545 contacts →
	Indirect evidence “Primary is the world's largest early stage VC firm, with a billion in assets under management and 50 full time employees.” Source: RevenueBase Database · checked Sep 27, 2026
6	Alumni Ventures	Partial evidence	Manchester, NH, United StatesHQ checked Sep 27, 2026	51-200	411 contacts →
	Partial evidence “Founded in 2014, we’re America’s largest venture firm for individual investors and VC investing partner to over individuals and institutions.” Source: RevenueBase Database · checked Sep 27, 2026
7	Bessemer Venture Partners	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	201-500	402 contacts →
	Partial evidence “Bessemer Venture Partners helps entrepreneurs lay strong foundations from inception to build long-standing companies.” Source: RevenueBase Database · checked Sep 27, 2026
8	Sequoia Capital	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	51-200	388 contacts →
	Indirect evidence “Sequoia helps daring founders build legendary companies from idea to IPO and beyond.” Source: RevenueBase Database · checked Sep 27, 2026
9	York IE	Partial evidence	Manchester, NH, United StatesHQ checked Sep 27, 2026	201-500	292 contacts →
	Partial evidence “York IE® is an investment and operating firm that combines a family of funds with a hands-on operating platform to build and back software companies.” Source: RevenueBase Database · checked Sep 27, 2026
10	NEW Enterprise Associates NEA	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	51-200	277 contacts →
	Strong evidence “New Enterprise Associates, Inc.(NEA) is a global venture capital firm focused on helping entrepreneurs build transformational businesses across multiple stages, sectors and…” Source: RevenueBase Database · checked Sep 27, 2026
11	GV Google Ventures	Partial evidence	San Francisco Bay, MA, United StatesHQ checked Sep 27, 2026	51-200	276 contacts →
	Partial evidence “GV supports innovative founders across multiple stages and sectors, from artificial intelligence and life sciences to consumer platforms, enterprise software, and frontier…” Source: RevenueBase Database · checked Sep 27, 2026
12	Nextgen Venture Partners	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	n/a	247 contacts →
	Partial evidence “NextGen Venture Partners works with over 1,800 Venture Partners to invest $1 million in seed stage companies and $2 million to $10 million in companies with more than $10 million…” Source: RevenueBase Database · checked Sep 27, 2026
13	Noname Security	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	201-500	232 contacts →
	Partial evidence “Noname Security is the only company taking a complete, proactive approach to API Security.” Source: RevenueBase Database · checked Sep 27, 2026
14	Redesign Health	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	51-200	217 contacts →
	Partial evidence “Redesign Health is a global venture and applied technology firm focused on building next-generation healthcare companies.” Source: RevenueBase Database · checked Sep 27, 2026
15	Highland Capital Partners	Strong evidence	Cambridge, MA, United StatesHQ checked Sep 27, 2026	n/a	213 contacts →
	Strong evidence “Founded in 1987, Highland Capital Partners is a venture capital firm focused on putting the entrepreneur first.” Source: RevenueBase Database · checked Sep 27, 2026
16	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
17	Kleiner Perkins	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	n/a	205 contacts →
	Indirect evidence “For five decades, Kleiner Perkins has partnered with intrepid founders to build iconic companies that made history.” Source: RevenueBase Database · checked Sep 27, 2026
18	DFJ	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	51-200	205 contacts →
	Strong evidence “DFJ is a venture capital firm that partners with extraordinary entrepreneurs who are changing the world.” Source: RevenueBase Database · checked Sep 27, 2026
19	Goahead Ventures	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	n/a	204 contacts →
	Strong evidence “GoAhead Ventures is a Venture Capital fund based in Silicon Valley managing over $250M in AUM.” Source: RevenueBase Database · checked Sep 27, 2026
20	VC LAB	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 27, 2026	n/a	197 contacts →
	Strong evidence “VC Lab is the world's leading venture capital accelerator.” Source: RevenueBase Database · checked Sep 27, 2026
21	Khosla Ventures	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	51-200	193 contacts →
	Partial evidence “Khosla Ventures invests in companies that are bold, early and impactful.” Source: RevenueBase Database · checked Sep 27, 2026
22	Investorflow	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	51-200	173 contacts →
	Strong evidence “InvestorFlow is the leading AI-powered platform for capital formation, deployment and investor engagement in the private markets.” Source: RevenueBase Database · checked Sep 27, 2026
23	Bain Capital Ventures BCV	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	51-200	173 contacts →
	Indirect evidence “BCV helps founders build iconic businesses that transform the way we live and work.” Source: RevenueBase Database · checked Sep 27, 2026
24	Notable Capital	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	n/a	171 contacts →
	Partial evidence “Notable Capital is named for the founders we invest with, the ideas they pursue, the causes they champion, and the remarkable companies they build.” Source: RevenueBase Database · checked Sep 27, 2026
25	FF Venture Capital	Strong evidence	New York, United StatesHQ checked Sep 27, 2026	n/a	169 contacts →
	Strong evidence “ff Venture Capital (ffVC) is focused on investing in early-stage technology and technology-enabled companies, and has been since 2008.” 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: api and platform venture capital companies. 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 api and platform venture capital companies.
Partial evidence: Its own public description names part of api and platform venture capital companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name api and platform venture capital companies. 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 1,936 api and platform venture capital companies based in the United States

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Api and platform venture capital companies based in the United States at a glance

As of Sep 27, 2026

28.7%Verified-email coverage

16.7Average contacts per company

1-10Median size (employees)

15.8%Largest-city concentration · San Francisco

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,338

11-50

486

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,936 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 api and platform venture capital companies, 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 the United States whose own description of what they do matches “api and platform venture capital companies”. 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 api and platform venture capital companies), 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 api and platform venture capital companies, and records with no verified work email. Companies headquartered outside United States 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, 9,285 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.

Api and platform venture capital companies by metro

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 api and platform venture capital companies, 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 api and platform venture capital companies are there based in the United States?

RevenueBase identified 1,936 api and platform venture capital companies headquartered in the 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?

Techstars, headquartered in New York City, tops this list with the largest team on record.

Which city has the most api and platform venture capital companies?

San Francisco leads with 305 headquartered companies, followed by New York (279) and Palo Alto (94).

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 9,285 verified decision-maker contacts tracked across these 1,936 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.