LibreTranslate
PaidLiveLast verified 24 Sept 2026
Open-source machine translation between 50+ languages, self-hostable or via a paid hosted API.
Example request
curl -s 'https://libretranslate.com/languages'
Free tier, in plain English
No free API key for translation; the hosted service explains it stopped offering free keys as unsustainable. The engine itself is open source and self-hostable at no cost.