Company lists · Data refreshed September 2026

Top 18 Professional certificate language programs based in the United States

Name: Professional certificate language programs based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 95 companies tracked

RevenueBase identified 95 company matches for professional certificate language programs associated with the United States as of September 2026 and tracks 6,284 professional contacts across them, including 570 with verified work emails. Princeton is the largest hub.

This list covers company matches for professional certificate language programs associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built

95Companies

6,284Contacts tracked

570Verified emails

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The 18 largest professional certificate language programs based in the United States

Ranked by team size

Top 18 of 95 company matches for professional certificate language programs based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Berlitz Corporation	Exact match	Princeton, NJ, United StatesHQ recorded Sep 20, 2026	5,001-10,000	3,273 contacts →
	Exact match “Berlitz Corporation is a world-leading language and cultural training provider with over 140 years of experience.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Diplomatic Language Services	Exact match	Arlington, VA, United StatesHQ recorded Sep 20, 2026	201-500	276 contacts →
	Exact match “Established in 1985, Diplomatic Language Services provides exceptional language training, translation, interpretation, and linguist testing to federal and state government…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Alta Language Services, INC	Exact match	Atlanta, GA, United StatesHQ recorded Sep 20, 2026	51-200	164 contacts →
	Exact match “ALTA is an employee-owned language services company specializing in enterprise-level translation services, language proficiency testing, and innovative language training programs.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	ICA Language Services	Exact match	Arlington, VA, United StatesHQ recorded Sep 20, 2026	51-200	153 contacts →
	Exact match “For over 35 years, we’ve served clients including the U.S.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Avant, The Language Proficiency Company	Exact match	Eugene, OR, United StatesHQ recorded Sep 20, 2026	51-200	138 contacts →
	Exact match “Avant, The Language Proficiency Company, is your one-stop provider for learning, assessment, and certification.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Transparent Language	Exact match	Nashua, NH, United StatesHQ recorded Sep 20, 2026	51-200	85 contacts →
	Exact match “What do U.S.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	ITTI	Exact match	New York, NY, United StatesHQ recorded Sep 20, 2026	201-500	68 contacts →
	Exact match “ITTI (International TEFL Training Institute) is the world’s leading education institution which provides TEFL/TESOL certification for over 15 years in more than 40 countries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	ABC Languages NYC	Exact match	Ny, United StatesHQ recorded Sep 20, 2026	51-200	58 contacts →
	Exact match “ABOUT ABC LANGUAGES ABC Languages – where language lovers come to learn!” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Rennert International	Exact match	New York, United StatesHQ recorded Sep 20, 2026	11-50	47 contacts →
	Exact match “Founded in 1973 by Cesar Rennert, Rennert International is a privately-owned language education and communications company that serves the world.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	The Language Academy Of The Carolinas, INC	Exact match	Charlotte, NC, United StatesHQ recorded Sep 20, 2026	1-10	30 contacts →
	Exact match “Charlotte's premiere language services company.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	Fluency Corp	Exact match	Dallas, TX, United StatesHQ recorded Sep 20, 2026	11-50	19 contacts →
	Exact match “You will love our unique fluency lessons for 1 employee or 60 employees.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Capital Region Language Center	Exact match	Albany, NY, United StatesHQ recorded Sep 20, 2026	11-50	16 contacts →
	Exact match “Do your employees need better phone skills?” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Atlanta International Language Institute, LLC	Exact match	Atlanta, GA, United StatesHQ recorded Sep 20, 2026	11-50	12 contacts →
	Exact match “The Atlanta International Language Institute offers local Atlanta language classes in over 60 languages, hold corporate training for language learning, and provide translations…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	NEW England Language School	Exact match	Quincy, MA, United StatesHQ recorded Sep 20, 2026	11-50	10 contacts →
	Exact match “New England Language School (NELS) is a local institution with a global reach through language education.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Language On Schools	Exact match	Miami Beach, FL, United StatesHQ recorded Sep 20, 2026	11-50	9 contacts →
	Exact match “Language On is Florida's premier language learning center for students seeking high-quality, energized classes.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Global Seal Of Biliteracy	Exact match	Frankfort, IL, United StatesHQ recorded Sep 20, 2026	1-10	5 contacts →
	Exact match “The Global Seal of Biliteracy™ is a credential that celebrates language skills and expands future opportunities for its recipients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Idioma Education & Consulting, LLC	Exact match	Andover, MA, United StatesHQ recorded Sep 20, 2026	1-10	5 contacts →
	Exact match “Idioma Education & Consulting provides online graduate-level courses, licensure pathways, and department-focused professional development for world language educators in Spanish…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Bright Language	Exact match	Centerville, MA, United StatesHQ recorded Sep 20, 2026	51-200	3 contacts →
	Exact match “At Bright Language we work every day helping people from all over the world to have equal access to education and jobs for a brighter and more inclusive future.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “professional certificate language programs”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 18 of 95 professional certificate language programs based in the United States

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Professional certificate language programs based in the United States at a glance

As of Sep 20, 2026

9.1%Verified-email coverage

66.1Average contacts per company

11-50Median size (employees)

5.3%Largest-city concentration · Princeton

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 95 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “professional certificate language programs” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 570 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “professional certificate language programs”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional certificate language programs are there based in the United States?

RevenueBase identified 95 company matches for professional certificate language programs associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Berlitz Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most professional certificate language programs?

Princeton leads with 5 company records, followed by New York (4) and Arlington (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 570 professional contacts with verified work emails tracked across these 95 companies; direct dials are available where recorded.

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 SmartSearch, 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.