Translation.io
What Translation.io is
Translation.io helps developers localize applications that continue to change during development. Teams can push new source keys and pull updated translations while continuing their work. The service lists integrations for Ruby on Rails, Laravel, React, Angular and JavaScript; for other stacks, it provides a guide to creating a library and a documented API for custom workflows. Source keys can be pre-translated with Google Translate, DeepL or Neurooo using OpenAI, Anthropic and DeepSeek models. Teams can invite human translators to review and continue translations, assign roles and target languages, and share project translation memory. Users can tag and filter segments and use those tags in statistics reporting. Projects, languages, teammates, machine translation, translation memory and API calls are listed as unlimited. Active projects bill only translated keys; frozen projects cost half as much but cannot be synchronized or translated while frozen. A seven-day trial requires no credit card. Qualifying open-source projects can receive a free unlimited account if they have a public repository and mention Translation.io in its public README.
Who it suits
It suits developers and teams maintaining translations as application source keys change. It also fits teams that want machine translation alongside human review and shared translation memory.
What it does well
- Supports ongoing source-key and translation updates.
- Integrates with five named development frameworks and libraries.
- Team members share project translation memory.
- Seven-day trial requires no credit card.
What to know first
- Frozen projects cannot be synchronized or translated.
- The free open-source account requires a public repository and README mention.
Limits
Frozen projects cannot be synchronized or translated until unfrozen. The open-source free account requires a public repository and a Translation.io mention in its public README.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Active project | billed monthly · Unlimited projects, languages and teammates · Only translated keys are billed · Translation memory included · API calls included | €0.01 a month |
| Frozen project | billed monthly · Billed at half the active-project price · Synchronization and translation are unavailable while frozen | €0.01 a month |
| Open Source | Free unlimited account for qualifying open-source projects · Requires selecting Open Source and specifying a public repository · Requires mentioning Translation.io in the public README | On request |
| Pay per translated target key | €0.01/month per translated target key; frozen projects are half price. · Only translated keys are billed · projects, languages, teammates, machine translation, translation memory, and API calls are unlimited | €0.01 a month |
As translation.io lists them, read 21 Sept 2026. The maker's own page has the final word.
Getting started
- Open the Translation.io website
- Start the seven-day trial without entering a credit card
- Connect a listed integration or create a library for another stack
- Push source keys through the web service or REST API
- Pre-translate keys and invite translators for review
- Select an active, frozen, pay-per-key, or qualifying open-source plan
Verdict
Translation.io brings evolving source keys, machine translation and team review into a localization workflow. Its frozen-project restriction and open-source eligibility requirements are worth checking before choosing an account.
Questions
Does Translation.io have a free plan?
Yes. Qualifying open-source projects can receive a free unlimited account for life when they use a public repository and mention Translation.io in the public README.
What does the paid pricing include?
Active projects are listed at €0.01/mo, with only translated keys billed. Projects, languages, teammates, machine translation, translation memory, and API calls are listed as unlimited.
Which platforms and integrations are available?
Translation.io offers web and API access, plus integrations for Ruby on Rails, Laravel, React, Angular, and JavaScript.
Can teams use human translators?
Yes. Teams can invite human translators to review machine translations and continue translating.
How does the trial work?
The trial lasts seven days and does not require a credit card.
What API style does it use?
The API follows REST principles, requires HTTPS and authentication, and uses JSON parameters and JSON responses.
Facts from Translation.io's own pages
- API
- The API uses REST principles, requires HTTPS and authentication, and accepts JSON parameters with JSON responses. · translation.io, 3 Oct 2026
- API access
- Yes · translation.io, 21 Sept 2026
- Continuous localization
- Developers can push new source keys and pull updated translations while continuing to develop the application. · translation.io, 3 Oct 2026
- Custom stacks
- For other stacks, the site offers a guide to create a library and a documented API to customize translation workflows. · translation.io, 3 Oct 2026
- Free plan
- Yes · translation.io, 21 Sept 2026
- Frozen project limit
- A frozen project costs half as much, but cannot be synchronized or translated until unfrozen. · translation.io, 3 Oct 2026
- Headquarters
- Mons, Belgium · translation.io, 28 Sept 2026
- Human review
- Teams can invite human translators to review machine translations and continue translating. · translation.io, 3 Oct 2026
- Integrations
- The site lists integrations for Ruby on Rails, Laravel, React, Angular, and JavaScript. · translation.io, 3 Oct 2026
- Machine translation
- The service can pre-translate source keys with Google Translate, DeepL, or Neurooo using OpenAI, Anthropic, and DeepSeek models. · translation.io, 3 Oct 2026
- Open-source offer
- The pricing page offers a free unlimited account for life when an open-source project has a public repository and mentions Translation.io in its public README. · translation.io, 3 Oct 2026
- Project limits
- Projects, languages, teammates, machine translation, translation memory, and API calls are listed as unlimited. · translation.io, 3 Oct 2026
- Purpose
- Translation.io helps developers localize and translate applications that are constantly evolving. · translation.io, 3 Oct 2026
- Security and privacy
- The privacy policy says it uses commercially acceptable means to protect personal data but cannot guarantee absolute security; it identifies the company as GDPR data controller. · translation.io, 3 Oct 2026
- Support
- The site provides documentation and lists [email protected] for questions and help getting localization started. · translation.io, 3 Oct 2026
- Team features
- Teams can assign roles and target languages, and teammates share project translation memory. · translation.io, 3 Oct 2026
- Translation memory
- Yes · translation.io, 21 Sept 2026
- Trial and refund
- The site advertises a 7-day trial with no credit card required and a 100% refund within 45 days of payment if the customer is dissatisfied. · translation.io, 3 Oct 2026
- Workflow tools
- Users can tag segments, filter them, and use tags in the statistics screen for reporting. · translation.io, 3 Oct 2026
Where Translation.io stands on Freedom251
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