Company lists · Data refreshed September 2026

Top 25 Quality assurance software companies based in the United States

Name: Quality assurance software 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 5, 2026 301 companies tracked

RevenueBase identified 301 quality assurance software companies headquartered in the United States as of September 2026 and tracks 13,670 professional contacts across them, including 3,729 with verified work emails and 2,070 with mobile numbers. San Francisco is the largest hub.

This list covers quality assurance software 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 5, 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 5, 2026 86% judged on-target in blind review

301Companies

13,670Contacts tracked

3,729Verified emails

2,070Mobile numbers

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The 25 largest quality assurance software companies based in the United States

Ranked by team size

Top 25 of 301 quality assurance software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to quality assurance software 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	Tricentis	Partial evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,645 contacts →
	Partial evidence “Tricentis is a global leader in agentic quality engineering.” Source: RevenueBase Database · checked Sep 5, 2026
2	Applause	Strong evidence	Framingham, MA, United StatesHQ checked Sep 5, 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 5, 2026
3	A1qa	Strong evidence	Decatur, GA, United StatesHQ checked Sep 5, 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 5, 2026
4	Qasource	Strong evidence	Pleasanton, CA, United StatesHQ checked Sep 5, 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 5, 2026
5	Thinksys INC	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 5, 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 5, 2026
6	ZENQ	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	501-1,000	440 contacts →
	Indirect evidence “Information Technology & Services” Source: RevenueBase Database · checked Sep 5, 2026
7	ILAB	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 5, 2026	501-1,000	417 contacts →
	Strong evidence “iLAB specializes in Software Quality Assurance services, providing global solutions to our customers.” Source: RevenueBase Database · checked Sep 5, 2026
8	Astegic	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 5, 2026	51-200	415 contacts →
	Indirect evidence “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Source: RevenueBase Database · checked Sep 5, 2026
9	Logigear Corporation	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 5, 2026	501-1,000	403 contacts →
	Indirect 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 5, 2026
10	Quality Professionals Q-Pros	Strong evidence	TX, United StatesHQ checked Sep 5, 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 5, 2026
11	Q Analysts	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 5, 2026	201-500	249 contacts →
	Partial evidence “Quality in An AI Driven World.” Source: RevenueBase Database · checked Sep 5, 2026
12	Parasoft	Strong evidence	Monrovia, CA, United StatesHQ checked Sep 5, 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 5, 2026
13	PRO QC International	Partial evidence	Mchenry, IL, United StatesHQ checked Sep 5, 2026	501-1,000	211 contacts →
	Partial evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 5, 2026
14	DOT Compliance	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 5, 2026	201-500	202 contacts →
	Partial evidence “Dot Compliance offers an AI-powered, Salesforce-native eQMS featuring the industry’s first AI specifically built to deliver safe, reliable decision guidance for critical quality…” Source: RevenueBase Database · checked Sep 5, 2026
15	Impactqa	Partial evidence	Plano, United StatesHQ checked Sep 5, 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 5, 2026
16	Qualitylogic	Partial evidence	Boise, ID, United StatesHQ checked Sep 5, 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 5, 2026
17	AVO Automation	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 5, 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 5, 2026
18	Abstracta	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 5, 2026	51-200	136 contacts →
	Partial evidence “We deliver Quality Intelligence for engineering teams.” Source: RevenueBase Database · checked Sep 5, 2026
19	RTTS	Indirect evidence	NY, United StatesHQ checked Sep 5, 2026	51-200	120 contacts →
	Indirect evidence “RTTS is the premier pure-play QA & Testing organization that specializes in Test Automation.” Source: RevenueBase Database · checked Sep 5, 2026
20	Appperfect Corp	Indirect evidence	Cupertino, CA, United StatesHQ checked Sep 5, 2026	51-200	119 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
21	Iqs, Inc. A Cority Company	Strong evidence	North Olmsted, OH, United StatesHQ checked Sep 5, 2026	201-500	100 contacts →
	Strong evidence “Building on 30+ years of experience, IQS is modern, enterprise-grade quality management software designed to help our customers ensure compliance and bring the highest quality…” Source: RevenueBase Database · checked Sep 5, 2026
22	Webomates INC	Strong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	51-200	96 contacts →
	Strong 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 5, 2026
23	Thought Frameworks	Indirect evidence	Covina, CA, United StatesHQ checked Sep 5, 2026	51-200	95 contacts →
	Indirect evidence “From Global QA and QC Partners to Full Fledged Digital Transformation Organization, We've got you covered!” Source: RevenueBase Database · checked Sep 5, 2026
24	Integritas Solutions, INC	Indirect evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	51-200	94 contacts →
	Indirect evidence “Integritas was founded by Paulo Vieira, and Alessandro Ribeiro, back in 2003.” Source: RevenueBase Database · checked Sep 5, 2026
25	Autify	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	51-200	92 contacts →
	Partial evidence “AI platform for Quality Engineering” Source: RevenueBase Database · checked Sep 5, 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: quality assurance software 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 quality assurance software companies.
Partial evidence: Its own public description names part of quality assurance software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality assurance software 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 301 quality assurance software companies based in the United States

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Quality assurance software companies based in the United States at a glance

As of Sep 5, 2026

27.3%Verified-email coverage

15.1%Mobile-number coverage

45.4Average contacts per company

11-50Median size (employees)

6.0%Largest-city concentration · San Francisco

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

143

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

3,4670–30

22931–60

161–90

190–180

31180+

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 quality assurance software 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 “quality assurance software 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 quality assurance software 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 quality assurance software 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, 3,729 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 5, 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 quality assurance software 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 quality assurance software companies are there based in the United States?

RevenueBase identified 301 quality assurance software 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?

Tricentis, headquartered in Austin, tops this list with the largest team on record.

Which city has the most quality assurance software companies?

San Francisco leads with 18 headquartered companies, followed by Los Angeles (10) and Austin (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 3,729 verified decision-maker contacts tracked across these 301 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 5, 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.