Company lists · Data refreshed September 2026

Top 25 Qa and software testing companies based in the United States

Name: Qa and software 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 21, 2026 461 companies tracked

RevenueBase identified 461 qa and software testing companies headquartered in the United States as of September 2026 and tracks 19,200 professional contacts across them, including 5,134 with verified work emails. San Francisco is the largest hub.

This list covers qa and software 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 21, 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 21, 2026 86% judged on-target in blind review

461Companies

19,200Contacts tracked

5,134Verified emails

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The 25 largest qa and software testing companies based in the United States

Ranked by team size

Top 25 of 461 qa and software testing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to qa and software 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	Cigniti Technologies	Indirect evidence	Irving, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,863 contacts →
	Indirect evidence “Cigniti Technologies Limited is the world’s leading AI & IP-led Digital Assurance and Digital Engineering services company that helps global companies across industries…” Source: RevenueBase Database · checked Sep 21, 2026
2	Tricentis	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,645 contacts →
	Indirect evidence “Tricentis is a global leader in agentic quality engineering.” Source: RevenueBase Database · checked Sep 21, 2026
3	Applause	Strong evidence	Framingham, MA, United StatesHQ checked Sep 21, 2026	201-500	1,396 contacts →
	Strong evidence “Applause is the global leader in managed software testing services and digital quality.” Source: RevenueBase Database · checked Sep 21, 2026
4	A1qa	Strong evidence	Decatur, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	980 contacts →
	Strong 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	Qasource	Strong evidence	Pleasanton, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	906 contacts →
	Strong evidence “QASource is a leading provider of outsourced software quality engineering services, offering scalable and customizable QA solutions to clients worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
6	Qualizeal	Indirect evidence	Irving, TX, United StatesHQ checked Sep 21, 2026	501-1,000	742 contacts →
	Indirect evidence “QualiZeal is the world’s fastest-growing independent, AI-native Digital Quality Engineering services provider, redefining how organizations achieve quality at scale through our…” Source: RevenueBase Database · checked Sep 21, 2026
7	Thinksys INC	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 2026	201-500	461 contacts →
	Strong 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
8	ZENQ	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	501-1,000	440 contacts →
	Indirect evidence “Information Technology & Services” Source: RevenueBase Database · checked Sep 21, 2026
9	ILAB	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 21, 2026	501-1,000	417 contacts →
	Partial evidence “iLAB specializes in Software Quality Assurance services, providing global solutions to our customers.” Source: RevenueBase Database · checked Sep 21, 2026
10	Astegic	Strong evidence	Falls Church, VA, United StatesHQ checked Sep 21, 2026	51-200	415 contacts →
	Strong 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	Katalon	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	201-500	382 contacts →
	Partial evidence “Katalon True Platform - the AI Platform for Software Quality.” Source: RevenueBase Database · checked Sep 21, 2026
13	Auriga	Partial evidence	Woburn, MA, United StatesHQ checked Sep 21, 2026	501-1,000	351 contacts →
	Partial evidence “Auriga is a software R&D and IT outsourcing services provider incorporated in the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
14	Quality Professionals Q-Pros	Strong evidence	TX, United StatesHQ checked Sep 21, 2026	501-1,000	347 contacts →
	Strong 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
15	Q Analysts	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	201-500	249 contacts →
	Indirect evidence “Quality in An AI Driven World.” Source: RevenueBase Database · checked Sep 21, 2026
16	Parasoft	Strong evidence	Monrovia, CA, United StatesHQ checked Sep 21, 2026	201-500	221 contacts →
	Strong evidence “Parasoft helps organizations continuously deliver quality software with its market-proven, integrated suite of automated software testing tools.” Source: RevenueBase Database · checked Sep 21, 2026
17	PRO QC International	Indirect evidence	Mchenry, IL, United StatesHQ checked Sep 21, 2026	501-1,000	211 contacts →
	Indirect evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 21, 2026
18	Kualitatem INC	Partial evidence	NY, United StatesHQ checked Sep 21, 2026	201-500	186 contacts →
	Partial evidence “Kualitatem empowers businesses to deliver quality software.” Source: RevenueBase Database · checked Sep 21, 2026
19	Impactqa	Strong evidence	Plano, United StatesHQ checked Sep 21, 2026	201-500	181 contacts →
	Strong 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 21, 2026
20	Qualitylogic	Partial evidence	Boise, ID, United StatesHQ checked Sep 21, 2026	51-200	157 contacts →
	Partial evidence “QualityLogic delivers full spectrum QA products and services to technology companies in rapidly evolving markets, or where transformative technologies are changing the world.” Source: RevenueBase Database · checked Sep 21, 2026
21	AVO Automation	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 2026	51-200	149 contacts →
	Partial evidence “Avo Automation is a SaaS business focused on the automation of the software delivery process.” Source: RevenueBase Database · checked Sep 21, 2026
22	Varteq INC	Strong evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	51-200	138 contacts →
	Strong evidence “VARTEQ brings cost effective offshore software development and testing solutions to the clients around the globe.” Source: RevenueBase Database · checked Sep 21, 2026
23	Abstracta	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 21, 2026	51-200	136 contacts →
	Indirect evidence “We deliver Quality Intelligence for engineering teams.” Source: RevenueBase Database · checked Sep 21, 2026
24	Dextrys	Strong evidence	Newburyport, MA, United StatesHQ checked Sep 21, 2026	501-1,000	132 contacts →
	Strong evidence “Dextrys (now an EPAM company) is China's highest value provider of software development, maintenance, and testing services to technology driven companies around the world.” Source: RevenueBase Database · checked Sep 21, 2026
25	Quality Matrix Group	Partial evidence	Westborough, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	130 contacts →
	Partial evidence “Quality Matrix Group is a global technology and digital transformation partner specializing in Digital QA, DevTestOps, DevSecOps, Salesforce, AI-driven Test Automation, AI-led…” 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: qa and software 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 qa and software testing companies.
Partial evidence: Its own public description names part of qa and software testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name qa and software 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 461 qa and software testing companies based in the United States

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Qa and software testing companies based in the United States at a glance

As of Sep 21, 2026

26.7%Verified-email coverage

41.6Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · San Francisco

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

200

11-50

135

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 461 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 qa and software 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 “qa and software 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 qa and software 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 qa and software 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, 5,134 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.

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 qa and software 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 qa and software testing companies are there based in the United States?

RevenueBase identified 461 qa and software 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?

Cigniti Technologies, headquartered in Irving, tops this list with the largest team on record.

Which city has the most qa and software testing companies?

San Francisco leads with 22 headquartered companies, followed by New York (18) and Austin (13).

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 5,134 verified decision-maker contacts tracked across these 461 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.