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Language I/O
by Language I/O

What Language I/O is
Language I/O is an API-focused translation service from Language I/O, founded in 2011 and headquartered in Cheyenne, Wyoming, United States. It translates documents across 155 supported languages and provides translation memory and glossary tools for repeated language and terminology. API access is available, and API is the listed platform. Website translation is not supported. The service is paid, has no free plan, and includes a 14-day trial. Pilot starts at $10,000 a year plus volume, while Economy starts at $25,000 a year plus volume. Premium, Business, First Class and Enterprise are also named plans, with prices not listed. Language I/O’s stated capabilities center on document translation through an API, with memory and glossary functions supporting structured translation workflows.
Who it suits
Language I/O suits organizations planning API-based document translation across many languages. It is intended for buyers able to budget annual plans plus volume charges.
What it does well
- Supports 155 languages
- Document translation available
- Translation memory included
- Glossary tools included
- 14-day trial
What to know first
- No free plan
- Website translation is not supported
- Pilot starts at $10,000 a year plus volume
- API is the listed platform
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Pilot | Starting at $10,000/year plus volume. | $10,000 a year |
| Economy | Starting at $25,000/year plus volume. | $25,000 a year |
| Premium | — | On request |
| Business | — | On request |
| First Class | — | On request |
| Enterprise | — | On request |
As languageio.com lists them, read 22 Sept 2026. The maker's own page has the final word.
Verdict
Language I/O focuses on document translation through an API, with terminology and memory tools. Its annual starting prices and volume-based charges make plan selection important.
Facts from Language I/O's own pages
- API access
- Yes · languageio.com, 22 Sept 2026
- Document translation
- Yes · languageio.com, 22 Sept 2026
- Founded
- 2011 · languageio.com, 28 Sept 2026
- Free plan
- No · languageio.com, 22 Sept 2026
- Glossary tools
- Yes · languageio.com, 22 Sept 2026
- Headquarters
- Cheyenne, Wyoming, United States · languageio.com, 28 Sept 2026
- Supported languages
- 155 · languageio.com, 22 Sept 2026
- Translation memory
- Yes · languageio.com, 22 Sept 2026
- Website translation
- No · languageio.com, 22 Sept 2026
Where Language I/O stands on Freedom251
- Multilingual Customer Support Software#17 of 22
- Translation Software#132 of 156
- Translation apps#137 of 158