Crowdin is a proprietary, cloud-hosted localization management platform used to translate software, apps, and documentation. It works well for teams already inside its ecosystem, but pricing scales with "hosted words" (source words times number of languages), and your translation memory and workflow configuration live entirely on Crowdin's servers.
Tolgee is the open-source alternative to reach for if in-context, in-app translation editing matters to you — it lets translators Alt+click text directly in the running app instead of working from a spreadsheet-like string list.
FAQ
Is there a free, open-source alternative to Crowdin?
Yes. Tolgee is open source and free to self-host, avoiding Crowdin's per-word hosting fees.
What's the best open-source alternative to Crowdin?
Tolgee is the strongest pick if your team wants translators to work directly inside the live app via in-context editing, rather than a separate translation dashboard.
What are the top open-source alternatives to Crowdin?
Browse all open-source alternatives to Crowdin above, or explore the full Developer Tools category for more options.