Company lists · Data refreshed November 2026

Top 25 Api development firms based in the United States

RevenueBase identified 184 company matches for api development firms associated with the United States as of November 2026 and tracks 3,880 professional contacts across them, including 1,130 with verified work emails. New York is the largest hub.

This list covers company matches for api development firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
184Companies
3,880Contacts tracked
1,130Verified emails
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The 25 largest api development firms based in the United States

Ranked by team size
Top 25 of 184 company matches for api development firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026501-1,0002,512 contacts →

Exact match

“Postman is the world’s leading API platform.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 202651-200117 contacts →

Exact match

“Conexa is a Long-Term Tech Partner that develops custom solutions and integrations to boost products and revenue.+100 Clients (Fiserv, UBER, Klaviyo, Shopify, Klarna…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchCincinnati, OH, United StatesHQ recorded Nov 6, 202651-20076 contacts →

Exact match

“You have a roadmap under pressure, systems that need to talk to each other, or an AI initiative stuck in pilot mode.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCarrollton, TX, United StatesHQ recorded Nov 6, 202611-5047 contacts →

Exact match

“Established in 2015 by visionaries who dared to dream, AppStone Lab Technologies has swiftly risen to be a touchstone in transformative software solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchYorba Linda, TX, United StatesHQ recorded Nov 6, 202611-5043 contacts →

Exact match

“Vijay Software, is a software development company based in Yorba Linda California.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchTwinsburg, OH, United StatesHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“At MorelandConnect, we architect and build cloud solutions that connect businesses to customers and people to information.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMcminnville, OR, United StatesHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“MindCloud is a software company that builds and maintains custom connections between your software and other platforms so you can eliminate manual data entry and start automating…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSouthlake, TX, United StatesHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“For the teams still importing and exporting data between systems, we take a people-first approach, dig into your unique processes, and build automated solutions so you can ditch…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchScottsdale, AZ, United StatesHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“Your dev team on demand.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchWinston-salem, NC, United StatesHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Solutions Afoot builds custom, scalable database applications and web tools to streamline operations and drive growth.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchFramingham, NY, United StatesHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“The Support Group, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchRemote, United StatesHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Discover, Connect And Manage APIs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“DaaS was founded on the principle that nobody - no matter their level of technical expertise, should be excluded from competing in a 21st-century marketplace.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBeaverton, OR, United StatesHQ recorded Nov 6, 20261-1012 contacts →

Exact match

“With Truto, you can whip up any API integration fast using one simple API.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchSugar Land, TX, United StatesHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Enginerasoft provides high-quality solutions in the field of software development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLakeville, PA, United StatesHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“At LockData, we don’t just write code; we engineer the digital infrastructure that powers high-stakes industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBridgewater, NJ, United StatesHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Today it has become critical for companies to be agile in adopting to customer needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“At Lumina, we believe that technology should be friendly, not frustrating.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchAustin, TX, United StatesHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“We help product companies and digital agencies deliver software worthy to be proud of.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBirmingham, AL, United StatesHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Airship designs, builds, and maintains custom web and software applications.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchSan Tan Valley, AZ, United StatesHQ recorded Nov 6, 202611-508 contacts →

Exact match

“CreatanAPI is the company behind PromoLink, the end-to-end platform that manages your entire promo workflow.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchHenderson, NV, United StatesHQ recorded Nov 6, 202611-508 contacts →

Exact match

“For 6+ years, we’ve helped startups and businesses in Switzerland, USA, and India bring their software ideas to life.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

“At DataTree, we don’t just deliver tech solutions-we become your strategic partner in innovation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchRancho Santa Margarita, CA, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“At Grand Communication Networks, we bring a wealth of experience from managing large networks and implementing robust data solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchPittsburgh, PA, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Engage.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 184 api development firms based in the United States

See the full list, filter by size, metro and specialty, and access 1,130 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Api development firms based in the United States at a glance

As of Nov 6, 2026
29.1%Verified-email coverage
21.1Average contacts per company
1-10Median size (employees)
7.6%Largest-city concentration · New York
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
107
11-50
59
51-200
16
201-500
1
501-1,000
1

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 184 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “api development firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,130 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “api development firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many api development firms are there based in the United States?

RevenueBase identified 184 company matches for api development firms associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Postman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most api development firms?

New York leads with 14 company records, followed by San Francisco (8) and Atlanta (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,130 professional contacts with verified work emails tracked across these 184 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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.