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Seamless vs DeepL: catalog facts
Seamless	DeepL
Free Free Android app licensed under MIT. The Seamless model it uses is licensed under CC-BY-NC…	Freemium Free translator and free API key, with paid plans for more usage and features.
Android	Windows, macOS, Android, iOS, Web, Browser extension
Speech translation works offline after model download Supports English, Spanish, Portuguese, Hindi and Russian	Translates whole documents as well as text Writing assistant and live voice translation alongside the translator
Requires an initial model download	Text is processed on DeepL's servers Many features and higher limits need a paid plan
Downloadable app	Downloadable app, Web application, Browser extension
Closed source	Closed source
License: MIT	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.