Company lists · Data refreshed September 2026
Top 25 Esl schools based in the United States
RevenueBase identified 775 esl schools headquartered in the United States as of September 2026 and tracks 12,821 professional contacts across them, including 1,407 with verified work emails. New York is the largest hub.
This list covers esl schools 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 20, 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.
The 25 largest esl schools based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,273 contacts → | ||||
Indirect evidence “Berlitz Corporation is a world-leading language and cultural training provider with over 140 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 528 contacts → | ||||
Indirect evidence “For more than 60 years, students have chosen ELS to achieve their English language goals.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 518 contacts → | ||||
Indirect evidence “The English Language Center has been dedicated to providing English programs of the highest quality to international students since 1978.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 276 contacts → | ||||
Indirect 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. | |||||
| 5 | 248 contacts → | ||||
Indirect evidence “Zoni Language Centers was founded in 1991, by Mr.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 196 contacts → | ||||
Partial evidence “It’s the leading language school to adult people with an innovative methodology and the best didactic material in the market, Wise Up offers the students the possibility of…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 157 contacts → | ||||
Indirect evidence “UCEDA Institute offers a wide range of language training for individuals and businesses.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 144 contacts → | ||||
Indirect evidence “BurlingtonEnglish offers a comprehensive blended program for English language acquisition.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 138 contacts → | ||||
Indirect evidence “The all-in-one solution for learning professional English.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 102 contacts → | ||||
Indirect evidence “Study in the USA with us!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 87 contacts → | ||||
Partial evidence “LanguageBird is an online language school specializing in live, one-to-one language instruction taught by native-level instructors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 87 contacts → | ||||
Indirect evidence “Global Launch is ASU’s English language platform that propels students, educators, and other professionals to thrive in the global marketplace.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 85 contacts → | ||||
Indirect evidence “What do U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 84 contacts → | ||||
Indirect evidence “INTERLINK provides intensive English instruction, academic preparation, and cross-cultural training, to empower students to succeed in academic, professional, and personal realms.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 80 contacts → | ||||
Indirect evidence “The Tennessee Language Center (TLC) is an agency of the University of Tennessee Institute for Public Service.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 77 contacts → | ||||
Indirect evidence “FLS International has over 30 years of experience in providing a wide range of services to international students during each phase of their educational experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 70 contacts → | ||||
Indirect evidence “The Harvest Institute is an accredited International Education Company that focuses on bringing students from all over the world to learn English as a Second Language, our core…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 69 contacts → | ||||
Indirect evidence “Eleutian Technology is the industry leader of online language instruction for global business and education entities.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 64 contacts → | ||||
Indirect evidence “Ardor Learning is pioneering the future of online language learning.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 62 contacts → | ||||
Indirect evidence “EnGen delivers career-aligned, on-demand English instruction at the scale needed to serve the needs of the U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 61 contacts → | ||||
Indirect evidence “The University of Arizona’s Center for English as a Second Language (CESL) has been serving students through high-quality Intensive English Language and Teacher Training Programs…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 61 contacts → | ||||
Partial evidence “At Lumos Language School, we are committed to guiding students toward full proficiency in the English language, unlocking their potential to chase their academic and career…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 60 contacts → | ||||
Partial evidence “Live Lingua is the world's first AND most effective online language school.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 58 contacts → | ||||
Indirect evidence “ABOUT ABC LANGUAGES ABC Languages – where language lovers come to learn!” 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: esl schools. 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 esl schools.
- Partial evidence
- Its own public description names part of esl schools, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name esl schools. 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 775 esl schools based in the United States
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Esl schools based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 775 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 esl schools, 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 “esl schools”. 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 esl schools), 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 esl schools, 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, 1,407 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.
Esl schools by metro
- Esl schools in New York52
- Esl schools in Los Angeles27
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 esl schools, 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 esl schools are there based in the United States?
RevenueBase identified 775 esl schools 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?
Berlitz Corporation, headquartered in Princeton, tops this list with the largest team on record.
Which city has the most esl schools?
New York leads with 52 headquartered companies, followed by Los Angeles (27) and Houston (21).
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 1,407 verified decision-maker contacts tracked across these 775 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.