Open-source translation

4 translation whose code is public under an OSI-approved license, rated for privacy with evidence. Picks first, then by score.

1. TranslateLocally Grade B

   Open-source desktop app that translates text on the device with downloadable neural models from the Bergamot project, originally built at the University of Edinburgh. Browser extensions are also available.

   Licensed under the MIT License. Source code

2. Apertium Grade B

   Free and open-source rule-based machine translation platform, focused on related and lesser-resourced languages. Usable on apertium.org or installed locally for offline translation.

   Licensed under GPL-2.0. Source code

3. LibreTranslate Grade C

   Open-source machine translation API built on Argos Translate that can be self-hosted. A hosted instance at libretranslate.com offers a free web translator and paid API keys.

   Licensed under AGPL-3.0. Source code

4. Firefox Translations Grade C

   Built-in Firefox feature that translates web pages on the device with local machine translation models, without sending text to a cloud service.

   Part of Firefox, licensed under MPL-2.0. Source code

Compare all 8 translation, open source or not.