Company lists · Data refreshed September 2026
Top 25 Human-in-the-loop translation platforms worldwide
RevenueBase identified 1,564 human-in-the-loop translation platforms worldwide as of September 2026 and tracks 49,733 professional contacts across them, including 10,297 with verified work emails. The United States is the largest market and London the largest hub.
This list covers human-in-the-loop translation platforms 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 28, 2026. Country and city lists for human-in-the-loop translation platforms 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 human-in-the-loop translation platforms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 10,750 contacts → | ||||
Indirect evidence “TransPerfect helps organizations streamline global operations through language and AI solutions, advanced automation, and enterprise-grade technology integrations.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 8,706 contacts → | ||||
Indirect evidence “Lionbridge partners with brands to break barriers and build bridges all over the world.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4,873 contacts → | ||||
Indirect evidence “Welocalize, a Welo Global brand, serves localization teams through AI-enabled multilingual content solutions that enable enterprises to operate and scale globally.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,342 contacts → | ||||
Partial evidence “DeepL is a global communications platform powered by Language AI.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,231 contacts → | ||||
Strong evidence “We have been offering human translation services for the past 25 years to hundreds of thousands of clients across over 200 languages and 40 areas of expertise.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 600 contacts → | ||||
Indirect evidence “Argos Multilingual provides global language and data solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 562 contacts → | ||||
Indirect evidence “Make anything multilingual.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 526 contacts → | ||||
Indirect evidence “Localize more with Alpha.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 514 contacts → | ||||
Strong evidence “Gengo is a global provider of crowdsourced human translation at scale.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 444 contacts → | ||||
Indirect evidence “Founded in LanguageWire is your trusted partner for connecting with global audiences.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 425 contacts → | ||||
Indirect evidence “Unbabel eliminates language barriers so that businesses can thrive across cultures and geographies.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 422 contacts → | ||||
Partial evidence “Mars Translation is an ISO-certified translation service provider that boasts a global network of native translators proficient in over 230 languages and 25+ industries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 363 contacts → | ||||
Partial evidence “Flitto is a language data company that provides AI Live Translation and AI/ML data solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 317 contacts → | ||||
Partial evidence “Phrase is the world’s leading language intelligence platform, helping global organizations move faster, reach more markets, and deliver content that feels local, relevant, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 308 contacts → | ||||
Indirect evidence “Visit Propio-LS.com” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 293 contacts → | ||||
Indirect evidence “Acclaro and Jonckers have officially come together under the Acclaro brand, marking a new chapter in our journey.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 291 contacts → | ||||
Partial evidence “Knowledgeworks, in its 20+ year journey, has evolved from a language translation and multimedia company into a trusted global partner for content and communication solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 289 contacts → | ||||
Indirect evidence “We’ve been helping organisations connect authentically with audiences all over the world for over two decades.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 258 contacts → | ||||
Indirect evidence “translate plus, part of Publicis Groupe, is an award-winning language services provider (LSP) and technology company.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 243 contacts → | ||||
Indirect evidence “Lost in Globalization?” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 229 contacts → | ||||
Indirect evidence “Lokalise is the most loved and trusted localization tool – partnering with over companies globally across product, engineering, marketing, content and design teams.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 228 contacts → | ||||
Indirect evidence “AI has transformed localization.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 220 contacts → | ||||
Partial evidence “India's best Language Service Provider (LSP) with 36 years of industry experience in the language industry, specializing in Translation and Localization.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 190 contacts → | ||||
Partial evidence “XTM is the AI Globalization Platform that helps the world's most ambitious enterprises create, manage and deliver multilingual content at scale.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 189 contacts → | ||||
Indirect evidence “Go Global is your multilingual content partner in the tech-driven era.” Source: RevenueBase Database · checked Sep 28, 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: human-in-the-loop translation platforms. 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 human-in-the-loop translation platforms.
- Partial evidence
- Its own public description names part of human-in-the-loop translation platforms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name human-in-the-loop translation platforms. 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 1,564 human-in-the-loop translation platforms worldwide
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Human-in-the-loop translation platforms worldwide at a glance
As of Sep 28, 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 human-in-the-loop translation platforms, 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 human-in-the-loop translation platforms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “human-in-the-loop translation platforms”. 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 human-in-the-loop translation platforms), 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 human-in-the-loop translation platforms, 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, 10,297 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 28, 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.
Human-in-the-loop translation platforms by location
13 lists · largest firstEvery Human-in-the-loop translation platforms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Human-in-the-loop translation platforms based in the United States194
- Human-in-the-loop translation platforms based in India99
- Human-in-the-loop translation platforms based in the United Kingdom99
- Human-in-the-loop translation platforms based in Spain62
- Human-in-the-loop translation platforms based in Germany55
- Human-in-the-loop translation platforms based in Brazil51
- Human-in-the-loop translation platforms based in France51
- Human-in-the-loop translation platforms based in Canada41
- Human-in-the-loop translation platforms based in Türkiye37
- Human-in-the-loop translation platforms based in Argentina36
- Human-in-the-loop translation platforms based in Italy28
- Human-in-the-loop translation platforms based in the Netherlands25
Cities
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 human-in-the-loop translation platforms, 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 human-in-the-loop translation platforms are there worldwide?
RevenueBase identified 1,564 human-in-the-loop translation platforms 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?
Transperfect, headquartered in New York, tops this list with the largest team on record.
Which country has the most human-in-the-loop translation platforms?
The United States leads with 194 companies, followed by India (99) and the United Kingdom (99). Every human-in-the-loop translation platforms list by country and city is linked on this page.
Which city has the most human-in-the-loop translation platforms?
London leads with 42 headquartered companies, followed by New Delhi (18) and Sao Paulo (18).
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 10,297 verified decision-maker contacts tracked across these 1,564 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 28, 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.