Company lists · Data refreshed September 2026
Top 25 User testing services worldwide
RevenueBase identified 1,139 user testing services worldwide as of September 2026 and tracks 9,178 professional contacts across them, including 2,635 with verified work emails. The United States is the largest market and London the largest hub.
This list covers user testing services 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 22, 2026. Country and city lists for user testing services 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 user testing services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 948 contacts → | ||||
Indirect evidence “We help companies unlock the power of their products.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 195 contacts → | ||||
Indirect evidence “UNGUESS is a cutting-edge crowdsourcing platform that offers quick, effective tests and real insights whenever you need them.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 185 contacts → | ||||
Indirect evidence “EchoLogyx started with a simple idea – provide test development and QA support to the Conversion Rate Optimization teams.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 147 contacts → | ||||
Indirect evidence “Huwiz Solutions is a group of Game Industry veterans sharing expansive experience in Quality Assurance and Project Management aiming to add value to the design and production of…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 139 contacts → | ||||
Partial evidence “At Userfeel, we help product teams, agencies, and ecommerce brands make better decisions by watching real users.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 128 contacts → | ||||
Partial evidence “Established in San Francisco in 2009, with offices in Miami, Florida and Madrid, Spain, Userlytics is a state of the art global platform for remote user experience (UX) and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 124 contacts → | ||||
Indirect evidence “Maze empowers researchers to be change makers, turning research into a center of influence and customer insights into enduring competitive advantage.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 112 contacts → | ||||
Indirect evidence “We believe the Experience Matters.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 110 contacts → | ||||
Indirect evidence “Digivante helps ecommerce brands unify their QA, UX, & UAT into one seamless solution; improving speed, insight, and conversion.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 99 contacts → | ||||
Partial evidence “Accessible Minds Tech is your reliable QA partner for functional and non-functional accessibility testing for a wide range of industries.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 97 contacts → | ||||
Partial evidence “Auto-Generate Integration Tests from User Traffic.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 94 contacts → | ||||
Indirect evidence “Bold Insight: Empowering exceptional experiences We're creative, flexible, and research-minded.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 91 contacts → | ||||
Partial evidence “BugFinders is a world wide leading crowdsourced software testing company.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 90 contacts → | ||||
Indirect evidence “Pulse Labs bridges AI and UX to help teams build better products.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 82 contacts → | ||||
Partial evidence “PLUS QA makes software testing simple.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 79 contacts → | ||||
Partial evidence “Elevated Play was established in January of 2011 as a company that specializes in mobile game and application testing.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 77 contacts → | ||||
Partial evidence “DeviQA has been supporting customer success stories for over 14 years, protecting and safeguarding our customers' brand and hard-fought reputation through best-in-class testing…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 72 contacts → | ||||
Indirect evidence “We help you - Articulate Product Requirements - Discover Customer Insights - Define Awesome Experiences - Engineer Loveable Products Founded in 2010, PeepalDesign brings deep…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 63 contacts → | ||||
Strong evidence “At Centercode, we believe creating exceptional products that truly meet customer needs requires a robust and effective user testing program.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 56 contacts → | ||||
Indirect evidence “Empower your digital team with instant access to industry-specific UX insights.” Source: RevenueBase Database · checked Sep 22, 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: user testing services. 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 user testing services.
- Partial evidence
- Its own public description names part of user testing services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name user testing services. 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 1,139 user testing services worldwide
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User testing services worldwide at a glance
As of Sep 22, 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 user testing services, 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 user testing services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “user testing services”. 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 user testing services), 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 user testing services, 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, 2,635 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.
User testing services by location
5 lists · largest firstEvery User testing services 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 user testing services, 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 user testing services are there worldwide?
RevenueBase identified 1,139 user testing services 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?
Amplitude, headquartered in San Francisco, tops this list with the largest team on record.
Which country has the most user testing services?
The United States leads with 243 companies, followed by the United Kingdom (99) and India (73). Every user testing services list by country and city is linked on this page.
Which city has the most user testing services?
London leads with 46 headquartered companies, followed by San Francisco (17) and New York (11).
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 2,635 verified decision-maker contacts tracked across these 1,139 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.