Company lists · Data refreshed September 2026
Top 25 Language proficiency testing companies worldwide
RevenueBase identified 942 language proficiency testing companies worldwide as of September 2026 and tracks 13,733 professional contacts across them, including 1,530 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.
This list covers language proficiency testing companies 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 20, 2026. Country and city lists for language proficiency testing companies 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 language proficiency testing companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,689 contacts → | ||||
Indirect evidence “At Cambridge University Press & Assessment, we help millions of people learn English and prove their skills to the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,198 contacts → | ||||
Partial evidence “goFLUENT accelerates language learning and assessment by delivering hyper-personalized solutions that blend technology, content, and human interaction available globally on any…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 480 contacts → | ||||
Partial evidence “British Institutes, founded in 1973 and currently working with over qualified examiners, certifies language skills according to the standards of the Council of Europe (COE) which…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 398 contacts → | ||||
Indirect evidence “Tronwell, con más de 35 años de trayectoria y más de estudiantes imparte cursos de inglés bajo una metodología única que permite estudiar con la mayor flexibilidad horaria.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 345 contacts → | ||||
Indirect evidence “Fundado em 1975, o ASLAN tem vasta experiência no ensino do inglês e espanhol.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 279 contacts → | ||||
Indirect evidence “Wall Street English, leader de la formation à l’anglais, la mieux adaptée à leur métier et aussi la mieux adaptée à votre entreprise.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 276 contacts → | ||||
Strong evidence “Established in 1985, Diplomatic Language Services provides exceptional language training, translation, interpretation, and linguist testing to federal and state government…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 247 contacts → | ||||
Strong evidence “OET is the global leader in English language testing for healthcare.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 176 contacts → | ||||
Partial evidence “ELAM is a virtual corporate language training and assessment company based in Montreal, with over 30 years serving Canadian businesses globally.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 165 contacts → | ||||
Indirect evidence “We are an EdTech company based in Tokyo.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 164 contacts → | ||||
Strong evidence “ALTA is an employee-owned language services company specializing in enterprise-level translation services, language proficiency testing, and innovative language training programs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 153 contacts → | ||||
Indirect evidence “For over 35 years, we’ve served clients including the U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 138 contacts → | ||||
Strong evidence “Avant, The Language Proficiency Company, is your one-stop provider for learning, assessment, and certification.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 114 contacts → | ||||
Indirect evidence “Menyediakan kelas dan sertifikasi bahasa Inggris secara online Kelas Online - Bahasa Inggris Dasar Karyawan - Bahasa Inggris Dasar Mahasiswa - TOEFL Listening - TOEFL Reading -…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 107 contacts → | ||||
Partial evidence “Eucom is the partner dedicated to companies investing in their employees’ development of language skills.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 101 contacts → | ||||
Indirect evidence “Exams Catalunya, Exams Balears and Andorra are authorised Platinum Exam Centres (ES439-ES449-AD439) dedicated to the organisation, administration and promotion of Cambridge…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 93 contacts → | ||||
Indirect evidence “Acteur majeur et pionnier des cours particuliers de langue à distance, Lingueo s'adresse à la fois aux particuliers et aux professionnels depuis 2007.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 92 contacts → | ||||
Indirect evidence “En Interlang somos expertos en la formación de idiomas para empresas.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 82 contacts → | ||||
Partial evidence “Language empowers businesses to compete and collaborate more effectively in international markets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 81 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 80 contacts → | ||||
Partial evidence “Michigan Language Assessment offers a comprehensive and flexible set of the highest-quality products and services to help educational, governmental, and private-sector…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 77 contacts → | ||||
Indirect evidence “EnglishScore is the global mobile English test and certificate.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 76 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 75 contacts → | ||||
Partial evidence “CETRA Language Solutions offers translation, interpretation, transcription, website and software localization, language assessments, and other related language services to the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 74 contacts → | ||||
Indirect evidence “Ofrecemos:* Cursos de Inglés, Francés, Portugués, Italiano, Mandarín, Alemán, Ruso y Español para extranjeros.* Cursos In Company, dictados directamente en la sede de su empresa.*…” Source: RevenueBase Database · checked Sep 20, 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: language proficiency 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 language proficiency testing companies.
- Partial evidence
- Its own public description names part of language proficiency testing companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name language proficiency 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 942 language proficiency testing companies worldwide
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Language proficiency testing companies worldwide at a glance
As of Sep 20, 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 language proficiency 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.
- Coverage
- Every country. Country and city lists for language proficiency testing companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “language proficiency 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 language proficiency 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 language proficiency testing companies, 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, 1,530 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 20, 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.
Language proficiency testing companies by location
4 lists · largest firstEvery Language proficiency testing companies 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 language proficiency 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 language proficiency testing companies are there worldwide?
RevenueBase identified 942 language proficiency testing companies 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?
Cambridge English, headquartered in Cambridge, tops this list with the largest team on record.
Which country has the most language proficiency testing companies?
Brazil leads with 73 companies, followed by the United States (57) and France (48). Every language proficiency testing companies list by country and city is linked on this page.
Which city has the most language proficiency testing companies?
Sao Paulo leads with 24 headquartered companies, followed by London (13) and Bogota (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 1,530 verified decision-maker contacts tracked across these 942 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 20, 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.