Company lists · Data refreshed September 2026

Top 25 User testing companies based in the United States

Name: User 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 379 companies tracked

RevenueBase identified 379 user testing companies headquartered in the United States as of September 2026 and tracks 3,097 professional contacts across them, including 1,389 with verified work emails. New York is the largest hub.

This list covers user 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

379Companies

3,097Contacts tracked

1,389Verified emails

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The 25 largest user testing companies based in the United States

Ranked by team size

Top 25 of 379 user 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 user 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	Amplitude	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	501-1,000	948 contacts →
	Indirect evidence “We help companies unlock the power of their products.” Source: RevenueBase Database · checked Sep 22, 2026
2	Userlytics	Partial evidence	Miami, FL, United StatesHQ checked Sep 22, 2026	51-200	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, 2026
3	Bold Insight	Indirect evidence	Downers Grove, IL, United StatesHQ checked Sep 22, 2026	51-200	94 contacts →
	Indirect evidence “Bold Insight: Empowering exceptional experiences We're creative, flexible, and research-minded.” Source: RevenueBase Database · checked Sep 22, 2026
4	Pulse Labs	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 22, 2026	51-200	90 contacts →
	Indirect evidence “Pulse Labs bridges AI and UX to help teams build better products.” Source: RevenueBase Database · checked Sep 22, 2026
5	User Research International	Partial evidence	Redmond, WA, United StatesHQ checked Sep 22, 2026	51-200	86 contacts →
	Partial evidence “User Research International provides comprehensive research solutions to industry-leading companies.” Source: RevenueBase Database · checked Sep 22, 2026
6	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
7	Intelligaia	Indirect evidence	Cary, NC, United StatesHQ checked Sep 22, 2026	51-200	72 contacts →
	Indirect evidence “Bring your product's goodness to life; with UX team that works and converts.” Source: RevenueBase Database · checked Sep 22, 2026
8	Centercode	Strong evidence	Mission Viejo, CA, United StatesHQ checked Sep 22, 2026	51-200	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, 2026
9	Design Science Group, LLC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 22, 2026	11-50	47 contacts →
	Partial evidence “We are a research and user-interface-design company with one mission-fitting products to people.” Source: RevenueBase Database · checked Sep 22, 2026
10	Cx100	Indirect evidence	Plano, TX, United StatesHQ checked Sep 22, 2026	51-200	47 contacts →
	Indirect evidence “CX100 is a Global Product Design studio helping businesses transform ideas into exceptional digital products.” Source: RevenueBase Database · checked Sep 22, 2026
11	KEY Lime Interactive	Partial evidence	Miami, FL, United StatesHQ checked Sep 22, 2026	51-200	42 contacts →
	Partial evidence “Key Lime Interactive is a Customer Experience and User Experience research, strategy, and full-service agency focused on helping companies take a human-first approach to building…” Source: RevenueBase Database · checked Sep 22, 2026
12	Measuringu	Indirect evidence	Denver, CO, United StatesHQ checked Sep 22, 2026	11-50	38 contacts →
	Indirect evidence “MeasuringU is a UX research and software firm focused on connecting companies with their customers.” Source: RevenueBase Database · checked Sep 22, 2026
13	Anthro-Tech, INC	Indirect evidence	Olympia, WA, United StatesHQ checked Sep 22, 2026	11-50	37 contacts →
	Indirect evidence “Anthro-Tech is a human-centered design and research consultancy with over 25 years of experience helping organizations create customer experiences that support their mission and…” Source: RevenueBase Database · checked Sep 22, 2026
14	WANDR	Indirect evidence	Los Angeles, United StatesHQ checked Sep 22, 2026	11-50	29 contacts →
	Indirect evidence “WANDR is a Product Strategy and UX Design firm based in Los Angeles.” Source: RevenueBase Database · checked Sep 22, 2026
15	Usability Sciences Corporation	Partial evidence	Las Colinas, TX, United StatesHQ checked Sep 22, 2026	11-50	28 contacts →
	Partial evidence “Usability Sciences, a user experience research firm located in Dallas, TX, has been helping clients improve their customers’ experience for over 35 years by answering the who…” Source: RevenueBase Database · checked Sep 22, 2026
16	Spiceblue	Partial evidence	Newark, DE, United StatesHQ checked Sep 22, 2026	11-50	26 contacts →
	Partial evidence “At Spiceblue, we strive at redefining how the users interact with digital applications, by making the interfaces aesthetically pleasing and visually appealing.” Source: RevenueBase Database · checked Sep 22, 2026
17	Concrete	Indirect evidence	Portland, OR, United StatesHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “Concrete is a behavioral design and UX research consultancy that helps companies turn deep human insights into smarter digital strategies.” Source: RevenueBase Database · checked Sep 22, 2026
18	Research Collective	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “Research Collective is a Human Factors and User Experience research and design consultancy located in Tempe, Arizona.” Source: RevenueBase Database · checked Sep 22, 2026
19	Mesh01	Partial evidence	Nashua, NH, United StatesHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “Best-in-class testing solutions for every phase of product development.” Source: RevenueBase Database · checked Sep 22, 2026
20	Nresult	Strong evidence	Vancouver, WA, United StatesHQ checked Sep 22, 2026	11-50	21 contacts →
	Strong evidence “We are the leader in user experience monitoring, analysis, and quality assurance testing.” Source: RevenueBase Database · checked Sep 22, 2026
21	Sophic Synergistics LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	1-10	19 contacts →
	Partial evidence “Sophic Synergistics LLC is a human centered design consulting firm focused on the user experience.” Source: RevenueBase Database · checked Sep 22, 2026
22	Openforge	Partial evidence	Ardmore, PA, United StatesHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “OpenForge is a Philadelphia based company that specializes in user experience, design, and application development.” Source: RevenueBase Database · checked Sep 22, 2026
23	Zerodegrees INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “ZeroDegrees is a UX research, strategy, and design studio that helps organizations put human insights at the heart of their digital experiences.” Source: RevenueBase Database · checked Sep 22, 2026
24	Uegroup	Partial evidence	San Jose, CA, United StatesHQ checked Sep 22, 2026	11-50	17 contacts →
	Partial evidence “We create amazing user experiences using a behavior-centric approach.” Source: RevenueBase Database · checked Sep 22, 2026
25	Sentier Strategic Resources	Indirect evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “At Sentier, we believe that clarity drives innovation.” 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: user 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 user testing companies.
Partial evidence: Its own public description names part of user testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name user 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 379 user testing companies based in the United States

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User testing companies based in the United States at a glance

As of Sep 22, 2026

44.8%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

6.1%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

290

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 379 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 user 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 “user 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 user 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 user 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, 1,389 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 user 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 user testing companies are there based in the United States?

RevenueBase identified 379 user 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?

Amplitude, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most user testing companies?

New York leads with 23 headquartered companies, followed by Los Angeles (17) and San Francisco (16).

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 1,389 verified decision-maker contacts tracked across these 379 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.