Company lists · Data refreshed September 2026

Top 25 Deaf interpreting agencies worldwide

Name: Deaf interpreting agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 922 companies tracked

RevenueBase identified 922 deaf interpreting agencies worldwide as of September 2026 and tracks 31,784 professional contacts across them, including 5,519 with verified work emails and 6,549 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers deaf interpreting agencies 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 1, 2026. Country and city lists for deaf interpreting agencies 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.

How to read this list RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

922Companies

31,784Contacts tracked

5,519Verified emails

6,549Mobile numbers

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The 25 largest deaf interpreting agencies worldwide

Ranked by team size

Top 25 of 922 deaf interpreting agencies worldwide, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to deaf interpreting agencies: 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	Languageline Solutions	Indirect evidence	Monterey, CA, US	10001+	6,355 contacts →
	Indirect evidence “LanguageLine Solutions is the world’s leading language solutions company.” Source: RevenueBase Database · checked Sep 1, 2026
2	Propio Language Services	Indirect evidence	Overland Park, KS, US	n/a	4,992 contacts →
	Indirect evidence “Propio's mission is to innovate and connect people anywhere, anytime.” Source: RevenueBase Database · checked Sep 1, 2026
3	Sorenson Communications	Indirect evidence	Salt Lake City, UT, US	10001+	2,889 contacts →
	Indirect evidence “Sorenson is a global language services providers, combining assistive technology with human-centric accessibility solutions.” Source: RevenueBase Database · checked Sep 1, 2026
4	DALS	Indirect evidence	Manchester, GB	201-500	1,112 contacts →
	Indirect evidence “The world is a better, fairer place when everyone is understood.” Source: RevenueBase Database · checked Sep 1, 2026
5	Communication Service For The Deaf CSD	Partial evidence	Austin, TX, US	1,001-5,000	573 contacts →
	Partial evidence “Communication Service for the Deaf, Inc.(CSD) is a private, nonprofit organization dedicated to creating and providing technologies and services that benefit the deaf and hard of…” Source: RevenueBase Database · checked Sep 1, 2026
6	AD Astra, INC	Indirect evidence	Silver Spring, MD, US	201-500	464 contacts →
	Indirect evidence “Welcome to Ad Astra, a leading global communication solutions and language services brand.” Source: RevenueBase Database · checked Sep 1, 2026
7	Clearcaptions, LLC	Indirect evidence	Antioch, TN, US	501-1,000	386 contacts →
	Indirect evidence “ClearCaptions was founded in 2011 with a driving force to serve the hard-of-hearing community.” Source: RevenueBase Database · checked Sep 1, 2026
8	Language Empire	Indirect evidence	Rochdale, GB	51-200	351 contacts →
	Indirect evidence “Language Empire was established in 2001.” Source: RevenueBase Database · checked Sep 1, 2026
9	Deaf Connect	Partial evidence	Parramatta, AU	501-1,000	273 contacts →
	Partial evidence “Deaf Connect is Australia’s largest whole-of-life Deaf organisation and the largest employer of Auslan users in the world.” Source: RevenueBase Database · checked Sep 1, 2026
10	ZVRS	Indirect evidence	Austin, TX, US	1,001-5,000	263 contacts →
	Indirect evidence “ZP offers customers the best videophone technology along with nationally certified interpreters and features not available through other VRS providers.” Source: RevenueBase Database · checked Sep 1, 2026
11	Canadian Hearing Services	Partial evidence	Toronto, ON, CA	201-500	260 contacts →
	Partial evidence “For over 80 years, Canadian Hearing Services (CHS) has played a significant role in supporting and meeting the needs of Deaf and hard of hearing Canadians.” Source: RevenueBase Database · checked Sep 1, 2026
12	Linguava	Indirect evidence	Portland, OR, US	51-200	201 contacts →
	Indirect evidence “Linguava is a full-service provider of spoken and signed languages specializing in Over the Phone Interpretation, Video Remote Interpretation (VRI), Scheduled Video Interpretation…” Source: RevenueBase Database · checked Sep 1, 2026
13	Convo Communications	Partial evidence	Austin, TX, US	201-500	159 contacts →
	Partial evidence “We provide Video Relay Service and Virtual Interpreting solutions.” Source: RevenueBase Database · checked Sep 1, 2026
14	Sensity Deafblind And Sensory Support Network Of Canada	Indirect evidence	Paris, ON, CA	201-500	140 contacts →
	Indirect evidence “Sensity is a nonprofit organization dedicated to supporting individuals, particularly those who are deafblind, by addressing their sensory challenges and communication barriers.” Source: RevenueBase Database · checked Sep 1, 2026
15	Deafblind Ontario Services	Partial evidence	Newmarket, ON, CA	201-500	136 contacts →
	Partial evidence “DeafBlind Ontario Services takes a holistic approach to providing an array of services to people who are Deaf, hard of hearing, non-verbal and deafblind that are customized to…” Source: RevenueBase Database · checked Sep 1, 2026
16	Deaflead	Partial evidence	Columbia, MO, US	201-500	134 contacts →
	Partial evidence “DeafLEAD envisions a future where Deaf, Hard of Hearing, DeafBlind, Late-Deafened, and Deaf-Disabled people no longer have to fight for access, equity, or inclusion-because their…” Source: RevenueBase Database · checked Sep 1, 2026
17	The Learning Center For The Deaf	Partial evidence	Framingham, MA, US	201-500	132 contacts →
	Partial evidence “Inspiring Knowledge, Opportunity, and Power The Learning Center for the Deaf is a national model and leader in educational, therapeutic, and community services for, by, and with…” Source: RevenueBase Database · checked Sep 1, 2026
18	Signature	Partial evidence	Durham, GB	11-50	128 contacts →
	Partial evidence “Signature is the leading awarding body for deaf communication qualifications in the UK.” Source: RevenueBase Database · checked Sep 1, 2026
19	Interpretek	Partial evidence	Atlanta, GA, US	51-200	121 contacts →
	Partial evidence “We are a full service agency featuring community interpreting & continuing education providing the highest quality sign language interpreters nationwide.” Source: RevenueBase Database · checked Sep 1, 2026
20	Expression Australia	Partial evidence	Victoria, AU	51-200	119 contacts →
	Partial evidence “Expression Australia is a not-for-profit organisation that has been serving the Deaf community since 1884.” Source: RevenueBase Database · checked Sep 1, 2026
21	Deaf Action	Partial evidence	Edinburgh, GB	51-200	119 contacts →
	Partial evidence “Deaf Action is a deaf-led charity that supports and celebrates deaf people.” Source: RevenueBase Database · checked Sep 1, 2026
22	Silent Sounds Communications LTD	Indirect evidence	High Wycombe, GB	11-50	117 contacts →
	Indirect evidence “Silent Sounds Communications Limited is a private organisation based in High Wycombe.” Source: RevenueBase Database · checked Sep 1, 2026
23	Strategies To Empower People	Indirect evidence	Sacramento, CA, US	501-1,000	96 contacts →
	Indirect evidence “Strategies to Empower People is an agency that supports Intellectually and/or Developmentally Disabled adults in the greater Sacramento area, North Bay area, and…” Source: RevenueBase Database · checked Sep 1, 2026
24	Indemand Interpreting	Partial evidence	Tukwila, WA, US	201-500	81 contacts →
	Partial evidence “InDemand Interpreting provides a comprehensive suite of leading-edge medical interpreting solutions designed to improve communications between clinicians and a growing population…” Source: RevenueBase Database · checked Sep 1, 2026
25	Mill Neck Family Of Organizations	Partial evidence	Mill Neck, NY, US	201-500	78 contacts →
	Partial evidence “The Mill Neck Family of Organizations enhances the quality of life for people, from infancy through adulthood, who are Deaf, or who have other special needs, such as autism and…” Source: RevenueBase Database · checked Sep 1, 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: deaf interpreting agencies. 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 deaf interpreting agencies.
Partial evidence: Its own public description names part of deaf interpreting agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name deaf interpreting agencies. 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 922 deaf interpreting agencies worldwide

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Deaf interpreting agencies worldwide at a glance

As of Sep 1, 2026

17.4%Verified-email coverage

20.6%Mobile-number coverage

34.5Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

541

11-50

225

51-200

100

201-500

501-1,000

1,001-5,000

10001+

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 deaf interpreting agencies, 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: 7 countries, largest first: the United States, the United Kingdom, Brazil, France, Canada, Germany, Australia. Country and city lists for deaf interpreting agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “deaf interpreting agencies”. 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 deaf interpreting agencies), 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 deaf interpreting agencies, 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, 5,519 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 1, 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.

Deaf interpreting agencies by location

8 lists · largest first

Every Deaf interpreting agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Deaf interpreting agencies based in London, United Kingdom32

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 deaf interpreting agencies, 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 deaf interpreting agencies are there worldwide?

RevenueBase identified 922 deaf interpreting agencies 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?

Languageline Solutions, headquartered in Monterey, tops this list with the largest team on record.

Which country has the most deaf interpreting agencies?

The United States leads with 529 companies, followed by the United Kingdom (134) and Brazil (71). Every deaf interpreting agencies list by country and city is linked on this page.

Which city has the most deaf interpreting agencies?

London leads with 31 headquartered companies, followed by Sao Paulo (19) and Austin (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 5,519 verified decision-maker contacts tracked across these 922 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 1, 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.