Company lists · Data refreshed September 2026

Top 25 Api testing companies worldwide

Name: Api testing companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,742 companies tracked

RevenueBase identified 1,742 api testing companies worldwide as of September 2026 and tracks 41,719 professional contacts across them, including 10,077 with verified work emails. India is the largest market and London the largest hub.

This list covers api testing 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 21, 2026. Country and city lists for api testing 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

1,742Companies

41,719Contacts tracked

10,077Verified emails

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The 25 largest api testing companies worldwide

Ranked by team size

Top 25 of 1,742 api testing companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to api testing 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	Browserstack	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	1,001-5,000	1,814 contacts →
	Partial 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 21, 2026
2	AQM Technologies	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,636 contacts →
	Indirect evidence “AQM Technologies Pvt.” Source: RevenueBase Database · checked Sep 21, 2026
3	Applause	Partial evidence	Framingham, MA, United StatesHQ checked Sep 21, 2026	201-500	1,396 contacts →
	Partial evidence “Applause is the global leader in managed software testing services and digital quality.” Source: RevenueBase Database · checked Sep 21, 2026
4	A1qa	Partial evidence	Decatur, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	980 contacts →
	Partial evidence “a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.” Source: RevenueBase Database · checked Sep 21, 2026
5	Smartbear	Indirect evidence	Somerville, MA, United StatesHQ checked Sep 21, 2026	501-1,000	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 21, 2026
6	SHIFT	Indirect evidence	Minato, JapanHQ checked Sep 21, 2026	10001+	791 contacts →
	Indirect evidence “SHIFT specializes in creating services that sell and is fully committed to supporting our clients’ business growth.” Source: RevenueBase Database · checked Sep 21, 2026
7	TTC Global	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	201-500	514 contacts →
	Partial evidence “TTC Global, formerly The Testing Consultancy, is a leading software assurance and testing services provider.” Source: RevenueBase Database · checked Sep 21, 2026
8	Moolya	Indirect evidence	Bangalore, IndiaHQ checked Sep 21, 2026	501-1,000	496 contacts →
	Indirect evidence “Moolya prevents bugs.” Source: RevenueBase Database · checked Sep 21, 2026
9	Thinksys INC	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 2026	201-500	461 contacts →
	Partial evidence “ThinkSys is a QA outsourcing and software testing company for SaaS, FinTech, and Healthcare engineering teams that need reliable quality at scale.” Source: RevenueBase Database · checked Sep 21, 2026
10	Astegic	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 21, 2026	51-200	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 21, 2026
11	Logigear Corporation	Partial evidence	San Mateo, CA, United StatesHQ checked Sep 21, 2026	501-1,000	403 contacts →
	Partial evidence “We are celebrating 30 years of testing excellence and innovation at LogiGear, we're proud to be a cornerstone in our clients' journeys, delivering confidence not just in our…” Source: RevenueBase Database · checked Sep 21, 2026
12	Qapitol QA	Partial evidence	Bengaluru, IndiaHQ checked Sep 21, 2026	201-500	391 contacts →
	Partial evidence “Qapitol QA Testing Services is a new age Quality Engineering company that specialises in Digital Transformation Testing encompassing all customer touch points that include Mobile…” Source: RevenueBase Database · checked Sep 21, 2026
13	Word Publishing	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	201-500	386 contacts →
	Partial evidence “With a team comprising of the best QA minds and Certified Software Testing Specialists, we provide seamless Quality Assurance & Software testing solutions for your DESKTOP, WEB…” Source: RevenueBase Database · checked Sep 21, 2026
14	Resillion	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	374 contacts →
	Partial evidence “At Resillion, we're more than just a global leader in quality engineering, testing, and cyber security – we're your dedicated partner from the start of your project to its…” Source: RevenueBase Database · checked Sep 21, 2026
15	W3softech India Private Limited	Partial evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	51-200	373 contacts →
	Partial evidence “W3Softech is an Independent QA services company specializing in Functional, Automation, non-functional testing services.” Source: RevenueBase Database · checked Sep 21, 2026
16	Quality Professionals Q-Pros	Partial evidence	TX, United StatesHQ checked Sep 21, 2026	501-1,000	347 contacts →
	Partial evidence “Quality Professionals (Q-Pros) is a global independent software Quality Assurance and Testing services provider supporting enterprise and government organizations.” Source: RevenueBase Database · checked Sep 21, 2026
17	Vates Software	Partial evidence	Cordoba, United StatesHQ checked Sep 21, 2026	501-1,000	320 contacts →
	Partial evidence “Vates is dedicated to software development, testing, quality control, and R&D.” Source: RevenueBase Database · checked Sep 21, 2026
18	Qestit Group	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	501-1,000	316 contacts →
	Partial evidence “QESTIT is Europe’s leading specialist in Quality Engineering and software testing, helping organizations accelerate digital delivery with confidence, speed, and measurable impact.” Source: RevenueBase Database · checked Sep 21, 2026
19	Appfuxion Consulting	Partial evidence	Kuala Lumpur, MalaysiaHQ checked Sep 21, 2026	201-500	313 contacts →
	Partial evidence “The company incorporated in 2013, AppFuxion Consulting is a leading provider of digital solutions and software testing services to Banking, Insurance, Retail, Telecommunication…” Source: RevenueBase Database · checked Sep 21, 2026
20	Quantic LAB	Partial evidence	Cluj-napoca, RomaniaHQ checked Sep 21, 2026	201-500	301 contacts →
	Partial evidence “Quantic Lab is an award-winning company with 20 years of experience in high-quality testing solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	Sybrant Technologies P LTD	Partial evidence	Chennai, IndiaHQ checked Sep 21, 2026	201-500	301 contacts →
	Partial evidence “Sybrant is a leader in Independent Software Testing.” Source: RevenueBase Database · checked Sep 21, 2026
22	Zensoft Services	Indirect evidence	Pune, IndiaHQ checked Sep 21, 2026	201-500	285 contacts →
	Indirect evidence “Welcome to Qualitia - The Pioneers in Simplifying Test Automation!” Source: RevenueBase Database · checked Sep 21, 2026
23	Sixsentix	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 2026	201-500	272 contacts →
	Partial evidence “Sixsentix is a leading provider of Software Testing Services, Visual Analytics and Reporting, helping enterprises to accelerate their Software Delivery.” Source: RevenueBase Database · checked Sep 21, 2026
24	Crestech Software	Indirect evidence	Noida, IndiaHQ checked Sep 21, 2026	201-500	251 contacts →
	Indirect evidence “Most D365 Finance & Operations issues don’t show up in UAT.” Source: RevenueBase Database · checked Sep 21, 2026
25	Etouch Systems	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 21, 2026	501-1,000	250 contacts →
	Indirect evidence “eTouch Systems is a technology services company that specializes in Digital Web Engineering.” Source: RevenueBase Database · checked Sep 21, 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 testing 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 companies.
Partial evidence: Its own public description names part of api testing 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 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 1,742 api testing companies worldwide

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Api testing companies worldwide at a glance

As of Sep 21, 2026

24.2%Verified-email coverage

23.9Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

817

11-50

559

51-200

250

201-500

501-1,000

1,001-5,000

10001+

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 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 companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “api testing 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 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 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, 10,077 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 21, 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 companies by location

10 lists · largest first

Every Api testing companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Api testing companies based in Pune, India34

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 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 companies are there worldwide?

RevenueBase identified 1,742 api testing 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?

Browserstack, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most api testing companies?

India leads with 337 companies, followed by the United States (251) and the United Kingdom (125). Every api testing companies list by country and city is linked on this page.

Which city has the most api testing companies?

London leads with 55 headquartered companies, followed by Hyderabad (35) and Pune (34).

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 10,077 verified decision-maker contacts tracked across these 1,742 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 21, 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.