Company lists · Data refreshed September 2026
Top 25 Api testing platform companies worldwide
RevenueBase identified 397 api testing platform companies worldwide as of September 2026 and tracks 11,691 professional contacts across them, including 3,560 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers api testing platform companies worldwide, 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. Country and city lists for api testing platform companies follow the table.
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.
The 25 largest api testing platform companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,269 contacts → | ||||
Strong evidence “Postman is the world’s leading API platform.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,814 contacts → | ||||
Strong evidence “BrowserStack is the world’s leading software testing platform, powered by AI and trusted by over teams, including Amazon, Microsoft, and NVIDIA, to deliver quality software at…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 969 contacts → | ||||
Indirect evidence “SmartBear delivers application integrity for modern tech stacks, ensuring continuous, measurable assurance that software just works as intended – with governance to operate at AI…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 415 contacts → | ||||
Partial evidence “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 382 contacts → | ||||
Partial evidence “Katalon True Platform - the AI Platform for Software Quality.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 317 contacts → | ||||
Partial evidence “Sauce Labs is the world’s largest full-lifecycle, test automation platform, and the company behind Selenium.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 308 contacts → | ||||
Partial evidence “AI-Native QA | Autonomous Testing | Low-Code Automation | Enterprise Quality Engineering Helping enterprises accelerate software delivery with AI-powered autonomous testing.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 263 contacts → | ||||
Indirect evidence “Leapwork delivers the continuous validation engine built for enterprises operating at scale across regulated industries and complex application estates.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 221 contacts → | ||||
Strong evidence “ACCELQ is the only cloud-based continuous testing platform that seamlessly automates API and web testing without writing a single line of code.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 149 contacts → | ||||
Indirect evidence “Avo Automation is a SaaS business focused on the automation of the software delivery process.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 140 contacts → | ||||
Partial evidence “Deliver high-quality software faster and more efficiently with a codeless, cloud-based, AI and ML enabled test automated platform.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 129 contacts → | ||||
Partial evidence “QualiTlabs™, AI-Powered Software Testing & Quality Engineering Partner Founded in 2017, QualiTlabs is an independent software testing and quality engineering company helping…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 124 contacts → | ||||
Indirect evidence “Automate your e2e tests without the time-consuming drudgery of test maintenance.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 120 contacts → | ||||
Partial evidence “RTTS is the premier pure-play QA & Testing organization that specializes in Test Automation.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 119 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 112 contacts → | ||||
Indirect evidence “Welcome to Qualitia - The Pioneers in Simplifying Test Automation!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 97 contacts → | ||||
Indirect evidence “Auto-Generate Integration Tests from User Traffic.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 96 contacts → | ||||
Partial evidence “Webomates provides a revolutionary SaaS-based patented testing service called Webomates CQ which is aimed at significantly improving the quality of production software.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 92 contacts → | ||||
Strong evidence “mabl is the agentic testing platform that gives you coverage that builds itself, runs itself, and recovers itself so teams can ship at the speed of AI coding agents with…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 91 contacts → | ||||
Strong evidence “Cypress is a quality testing platform that brings together the open-source Cypress App tool and the Cypress Cloud platform, supporting the entire testing lifecycle.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 87 contacts → | ||||
Partial evidence “Verifaya is the new-age automated testing software provider that helps businesses overcome their testing challenges and accelerate business growth.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 82 contacts → | ||||
Strong evidence “Sofy is an end-to-end agentic testing platform built for modern software teams.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 73 contacts → | ||||
Indirect evidence “Appmatics basiert auf der Vision, digitale Produkte zu verbessern und einen neuen Maßstab in der QA zu setzen.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 72 contacts → | ||||
Partial evidence “As a leading provider of software quality assurance/testing services, we leverage cutting-edge testing strategies and tools to deliver comprehensive and tailored QA/testing…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 70 contacts → | ||||
Partial evidence “headed into a firm in 2017, rooted in delivering excellent Software quality assurance () and software testing services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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 testing platform 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 testing platform companies.
- Partial evidence
- Its own public description names part of api testing platform companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name api testing platform 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 397 api testing platform companies worldwide
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Api testing platform companies worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 testing platform 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.
- Coverage
- Every country. Country and city lists for api testing platform companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “api testing platform 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 testing platform 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 testing platform companies, and records with no verified work email.
- 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, 3,560 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 testing platform companies by location
2 lists · largest firstEvery Api testing platform companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 testing platform 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 testing platform companies are there worldwide?
RevenueBase identified 397 api testing platform companies worldwide 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?
Postman, headquartered in San Francisco, tops this list with the largest team on record.
Which country has the most api testing platform companies?
The United States leads with 115 companies, followed by India (58). Every api testing platform companies list by country and city is linked on this page.
Which city has the most api testing platform companies?
San Francisco leads with 17 headquartered companies, followed by London (12) and Noida (8).
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 3,560 verified decision-maker contacts tracked across these 397 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.