Company lists · Data refreshed September 2026
Top 25 Test centers worldwide
RevenueBase identified 236 test centers worldwide as of September 2026 and tracks 4,978 professional contacts across them, including 589 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers test centers 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 test centers 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 test centers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,022 contacts → | ||||
Indirect evidence “PSI has over 70 years of experience providing worldwide testing solutions to corporations, federal and state government agencies, professional associations, certifying bodies and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 398 contacts → | ||||
Partial evidence “Meazure Learning provides secure, reliable, and convenient test development, administration, and delivery solutions for academic and professional credentialing programs.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 342 contacts → | ||||
Partial evidence “Accu Reference Medical Lab is a state-of-the-art medical testing laboratory service that provides a complete range of tests for diagnosis, screening or evaluation of diseases and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 229 contacts → | ||||
Partial evidence “At Kryterion, we know a thing or two about test delivery.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 203 contacts → | ||||
Partial evidence “uExamS is the leading global provider of test & training support solutions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 115 contacts → | ||||
Strong evidence “Surpass is a global leader in digital assessment services, providing credentialing organizations worldwide with an extensive test center network, high-quality online proctoring…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 108 contacts → | ||||
Indirect evidence “Todas las pruebas que necesités te las podés hacer en cualquiera de nuestras sucursales.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 82 contacts → | ||||
Indirect evidence “Delivering Globally Trusted Assessment Services, Anytime, Anywhere.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 81 contacts → | ||||
Indirect evidence “Swiss Exams is a leading organisation in exam management.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 64 contacts → | ||||
Partial evidence “BHP Laboratories are an independent test facility providing a wide range of engineering and scientific measuring, testing and analyzing services to numerous industries throughout…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 50 contacts → | ||||
Indirect evidence “For media inquiries, please email press@caveon.com As pioneers in Exam Security for more than 20 years, Caveon offers innovative solutions to prevent, detect, and respond to exam…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 45 contacts → | ||||
Indirect evidence “Since 1970, Michelson Laboratories has provided efficient testing and analyses to an extensive spectrum of customers.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 30 contacts → | ||||
Indirect evidence “Centro de Lenguas Extranjeras Este Centro cuenta con el registro No.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 24 contacts → | ||||
Indirect evidence “GH Premier: Home of the NPTE, TOEFL, IELTS, & PTE Champions, powered by former Jrooz employees.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 22 contacts → | ||||
Indirect evidence “Professional examination deserves a professional environment Lamark supplies Examination Providers with facilities and services.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 20 contacts → | ||||
Indirect evidence “At Inno Lab Engineering Sdn Bhd, we provide impeccable total solutions and services to all industries that touch the lives of millions of people across the globe.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 20 contacts → | ||||
Indirect evidence “Ineltec is a company with more than 30 years of experience in its sector, with equipment installed all around the world.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Indirect evidence “Cognoscente has a wide range of delivery the products, Solutions, Infra to the SME's and help them to grow rapidly.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Indirect evidence “Phòng thi ảo chuẩn Cambridge, Flyers, Movers, TOEFL Primary, Starters” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 14 contacts → | ||||
Partial evidence “CMS is a full-service testing services company, including online test administration, test design and development, psychometric reviews and evaluations, the AUTHORWise item…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 14 contacts → | ||||
Indirect evidence “Professional Credential Services, Inc.(PCS) is a specialized service provider for examination development, examination administration, licensing and certification services to…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 11 contacts → | ||||
Indirect evidence “Occustar is a leading on-site examination services provider that’s been helping businesses and organizations’ control costs, streamline their process, and solidify recordkeeping…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 11 contacts → | ||||
Indirect evidence “Prepona prepares and delivers computer-based exams on behalf of a growing number of certifying bodies thoughout Brazil.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 10 contacts → | ||||
Indirect evidence “For over two decades, RegisterBlast has served as the extra pair of hands busy campus staff needed.” 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: test centers. 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 test centers.
- Partial evidence
- Its own public description names part of test centers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name test centers. 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 236 test centers worldwide
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Test centers 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 test centers, 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 test centers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “test centers”. 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 test centers), 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 test centers, 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, 589 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.
Test centers by location
1 lists · largest firstEvery Test centers 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 test centers, 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 test centers are there worldwide?
RevenueBase identified 236 test centers 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?
PSI Services LLC, headquartered in Olathe, tops this list with the largest team on record.
Which country has the most test centers?
The United States leads with 34 companies. Every test centers list by country and city is linked on this page.
Which city has the most test centers?
Sao Paulo leads with 4 headquartered companies, followed by Ciudad De Mexico (3) and Delhi (3).
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 589 verified decision-maker contacts tracked across these 236 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.