Company lists · Data refreshed September 2026

Top 25 Web application testing companies based in the United States

Name: Web application testing 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 22, 2026 276 companies tracked

RevenueBase identified 276 web application testing companies headquartered in the United States as of September 2026 and tracks 10,015 professional contacts across them, including 2,828 with verified work emails. San Francisco is the largest hub.

This list covers web application testing 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 22, 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 22, 2026 86% judged on-target in blind review

276Companies

10,015Contacts tracked

2,828Verified emails

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The 25 largest web application testing companies based in the United States

Ranked by team size

Top 25 of 276 web application testing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to web application 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	Applause	Partial evidence	Framingham, MA, United StatesHQ checked Sep 22, 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 22, 2026
2	A1qa	Partial evidence	Decatur, GA, United StatesHQ checked Sep 22, 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 22, 2026
3	Smartbear	Partial evidence	Somerville, MA, United StatesHQ checked Sep 22, 2026	501-1,000	969 contacts →
	Partial 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 22, 2026
4	Astegic	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 22, 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 22, 2026
5	Logigear Corporation	Partial evidence	San Mateo, CA, United StatesHQ checked Sep 22, 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 22, 2026
6	Katalon	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	201-500	382 contacts →
	Indirect evidence “Katalon True Platform - the AI Platform for Software Quality.” Source: RevenueBase Database · checked Sep 22, 2026
7	Quality Professionals Q-Pros	Partial evidence	TX, United StatesHQ checked Sep 22, 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 22, 2026
8	Accelq	Strong evidence	Dallas, TX, United StatesHQ checked Sep 22, 2026	201-500	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 22, 2026
9	Parasoft	Partial evidence	Monrovia, CA, United StatesHQ checked Sep 22, 2026	201-500	221 contacts →
	Partial evidence “Parasoft helps organizations continuously deliver quality software with its market-proven, integrated suite of automated software testing tools.” Source: RevenueBase Database · checked Sep 22, 2026
10	Kualitatem INC	Indirect evidence	NY, United StatesHQ checked Sep 22, 2026	201-500	186 contacts →
	Indirect evidence “Kualitatem empowers businesses to deliver quality software.” Source: RevenueBase Database · checked Sep 22, 2026
11	Impactqa	Partial evidence	Plano, United StatesHQ checked Sep 22, 2026	201-500	181 contacts →
	Partial evidence “Welcome to ImpactQA – Where Excellence Meets Innovation in Software Testing and QA Consulting About Us ImpactQA is a premier Software Testing and QA consultancy delivering…” Source: RevenueBase Database · checked Sep 22, 2026
12	AVO Automation	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 22, 2026	51-200	149 contacts →
	Indirect evidence “Avo Automation is a SaaS business focused on the automation of the software delivery process.” Source: RevenueBase Database · checked Sep 22, 2026
13	Rainforest QA	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	11-50	124 contacts →
	Indirect evidence “Automate your e2e tests without the time-consuming drudgery of test maintenance.” Source: RevenueBase Database · checked Sep 22, 2026
14	RTTS	Partial evidence	NY, United StatesHQ checked Sep 22, 2026	51-200	120 contacts →
	Partial evidence “RTTS is the premier pure-play QA & Testing organization that specializes in Test Automation.” Source: RevenueBase Database · checked Sep 22, 2026
15	Appperfect Corp	Indirect evidence	Cupertino, CA, United StatesHQ checked Sep 22, 2026	51-200	119 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
16	Webomates INC	Partial evidence	Stamford, CT, United StatesHQ checked Sep 22, 2026	51-200	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 22, 2026
17	cypress.io	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	51-200	91 contacts →
	Partial 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 22, 2026
18	Trustedqa, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 22, 2026	51-200	90 contacts →
	Indirect evidence “Since 1988, TrustedQA’s mission has been to help our customers build and deliver quality software more efficiently, effectively, and securely.” Source: RevenueBase Database · checked Sep 22, 2026
19	Ibeta Quality Assurance	Indirect evidence	Aurora, CO, United StatesHQ checked Sep 22, 2026	51-200	90 contacts →
	Indirect evidence “Founded in and located in metro Denver, Colorado, iBeta Quality Assurance specializes in “QA on Demand” for software: functionality, compatibility, security, load/performance…” Source: RevenueBase Database · checked Sep 22, 2026
20	Whitehat Dynamic By Synopsys	Partial evidence	San Jose, CA, United StatesHQ checked Sep 22, 2026	201-500	89 contacts →
	Partial evidence “NTT Application Security is driving the future of application security.” Source: RevenueBase Database · checked Sep 22, 2026
21	Bright	Indirect evidence	San Rafael, CA, United StatesHQ checked Sep 22, 2026	51-200	88 contacts →
	Indirect evidence “Bright Security’s enterprise-grade, dev-centric DAST platform empowers organizations to identify & remediate vulnerabilities early & iteratively in the SDLC.” Source: RevenueBase Database · checked Sep 22, 2026
22	Verifaya Corporation	Partial evidence	Milpitas, CA, United StatesHQ checked Sep 22, 2026	51-200	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 22, 2026
23	Plus QA	Partial evidence	Portland, OR, United StatesHQ checked Sep 22, 2026	51-200	82 contacts →
	Partial evidence “PLUS QA makes software testing simple.” Source: RevenueBase Database · checked Sep 22, 2026
24	SEMBI	Indirect evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	201-500	77 contacts →
	Indirect evidence “Sembi empowers organizations with world-class solutions for product quality and security management.” Source: RevenueBase Database · checked Sep 22, 2026
25	Shasta QA	Partial evidence	Redding, CA, United StatesHQ checked Sep 22, 2026	51-200	74 contacts →
	Partial evidence “Shasta QA is an American OurSourcing software-testing company with offices located in Northern California and the Midwest.” Source: RevenueBase Database · checked Sep 22, 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: web application 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 web application testing companies.
Partial evidence: Its own public description names part of web application testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name web application 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 276 web application testing companies based in the United States

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Web application testing companies based in the United States at a glance

As of Sep 22, 2026

28.2%Verified-email coverage

36.3Average contacts per company

11-50Median size (employees)

6.9%Largest-city concentration · San Francisco

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

51-200

201-500

501-1,000

1,001-5,000

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 276 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 web application 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “web application 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 web application 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 web application testing 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, 2,828 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 22, 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.

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 web application 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 web application testing companies are there based in the United States?

RevenueBase identified 276 web application testing 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?

Applause, headquartered in Framingham, tops this list with the largest team on record.

Which city has the most web application testing companies?

San Francisco leads with 19 headquartered companies, followed by New York (14) and Austin (9).

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 2,828 verified decision-maker contacts tracked across these 276 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 22, 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.