OneSky (oneskyapp.com) is a translation management system (TMS) designed for product teams, developers, and agencies that need to localise mobile applications, web applications, games, and websites into multiple languages. Founded in 2012 and based in Hong Kong, OneSky provides a unified platform for managing the entire translation workflow — uploading source files, ordering translations from a vetted professional translator network, reviewing and approving content in an online editor, and exporting localised files back into the product.
OneSky combines AI-powered machine translation with access to a marketplace of over 1,000 professional human translators covering 50+ languages. This hybrid approach allows teams to use machine translation for speed and cost efficiency on internal or low-priority content, and switch to professional human translation for customer-facing or high-quality output. OneSky integrates with iOS, Android, and web development workflows through its API, CLI, and direct integrations with tools like GitHub, Bitbucket, and popular CMS platforms.
How OneSky Works
Teams create a project in OneSky, upload their source string files (iOS .strings, Android XML, JSON, PO, XLIFF, and others), and choose their target languages. OneSky can generate AI machine translation drafts automatically for fast turnaround. For higher-quality output, teams can order professional human translations from OneSky's translator marketplace — translations are completed by vetted professionals and returned within the agreed timeframe. All translations — machine or human — can be reviewed and edited in OneSky's web editor, which shows source and translated strings side by side with context. Approved translations are exported as localised files ready to integrate back into the product.
Key Features
- AI machine translation — instant machine translation drafts for all target languages to accelerate the localisation workflow
- Professional translator marketplace — access to 1,000+ vetted human translators covering 50+ languages for high-quality localised output
- Translation management system — centralised dashboard for managing projects, files, languages, and translation status across teams
- Multi-format file support — iOS .strings, Android XML, JSON, XLIFF, PO/POT, CSV, YAML, and more supported for upload and export
- Developer API and CLI — REST API and command-line tool for integrating translation workflows into development pipelines
- GitHub and Bitbucket integration — sync source string files directly from repositories for automatic upload and translation pull
- Web translation editor — side-by-side source and translation editor with context notes, screenshots, and translation memory
- Translation memory — stores previously approved translations for reuse across projects to maintain consistency and reduce costs
- Glossary management — define key terms and brand names to ensure consistent translation of specific vocabulary across all translators
- In-context screenshots — attach screenshots to string keys so translators can see exactly where each text appears in the UI
OneSky Pricing
OneSky offers two subscription plans with significant savings on annual billing. Human translation is billed separately per word through the translator marketplace.
- Basic — $49/month (annual: $29/month) — platform access, AI machine translation, API and CLI, web editor, translation memory, and core project management features.
- Professional — $169/month (annual: $129/month) — everything in Basic plus higher file and project limits, advanced workflow automation, priority support, and access to the full professional translator marketplace for human translation orders.
Human translation is charged separately at per-word rates through the translator marketplace. Always verify current rates at oneskyapp.com/pricing.
Who Should Use OneSky?
OneSky suits product teams and developers that need a single platform covering both machine translation for speed and professional human translation for quality — without managing separate vendor relationships for each. Its translator marketplace is particularly useful for teams that regularly need human translation across multiple languages and want a streamlined ordering workflow rather than using separate freelancer platforms. The annual Basic plan at $29/month makes it accessible for smaller teams. OneSky is less suited to teams looking purely for free website translation (Weglot's free plan is more appropriate), or large enterprises running complex multi-team localisation programmes that need the workflow customisation depth of platforms like Phrase or Smartling.
Frequently Asked Questions
What is OneSky used for?
OneSky is a translation management platform used by product teams to localise mobile apps, web applications, games, and websites. It combines AI machine translation for fast automated drafts with a professional human translator marketplace for quality-critical content. Teams upload source string files, manage translation status, and export localised files — all from a single dashboard with developer API and repository integrations.
How much does OneSky cost?
OneSky's Basic plan costs $49/month ($29/month billed annually) and the Professional plan costs $169/month ($129/month annually). Human translation ordered through the marketplace is charged separately at per-word rates. Annual billing provides approximately 24–40% savings compared to monthly pricing. There is no permanently free plan, though a trial may be available.
Does OneSky offer human translation or only machine translation?
OneSky offers both. AI machine translation is included in the platform subscription and generates instant translation drafts. For higher quality output, OneSky provides a marketplace of 1,000+ vetted professional human translators covering more than 50 languages. Human translation is ordered directly from the OneSky dashboard and billed per word at marketplace rates. Teams can mix machine and human translation within the same project — using machine translation for internal content and human translation for customer-facing copy.
Does OneSky integrate with GitHub?
Yes. OneSky integrates with GitHub and Bitbucket to sync source string files directly from a repository. Teams can configure the integration to automatically upload changed source files to OneSky when a push is made, and to pull approved translated files back into the repository. This keeps the localisation workflow in sync with development without manual file download and upload steps. OneSky also offers a REST API and CLI for teams that want to build custom pipeline integrations.
What languages does OneSky support?
OneSky supports machine translation into a broad range of languages, and its professional translator marketplace covers 50+ languages with vetted human translators. For less common languages, machine translation quality varies, and professional translator availability in the marketplace may be more limited. For major world languages — Spanish, French, German, Japanese, Chinese, Portuguese, Arabic — both machine translation and professional human translators are readily available through the platform.
