5 open-source Translation & Localisation vendors
Open-source software for Translation & Localisation that you can self-host, with auditable source code — regardless of the developer's headquarters.
- vendors scored
- 5
- European
- 5
- last checked
- 11 October 2026
Vendors, scored
Score per vendor: 0 = high exposure, 100 = sovereign
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- Sovereignty score 94 out of 100ApertiumSpain · Self-hosted / open sourceOpen-source rule-based machine translation platform (GNU GPL) originating from the Spanish government-funded OpenTrad project, developed by the Transducens research group at Universitat d'Alacant; specialized in under-resourced and minoritized languages, actively maintained (v3.9.12, April 2025) with over 100 language pairs as of 2026.
- Sovereignty score 94 out of 100MateCatItaly · EU sovereignOpen-source enterprise CAT tool for professional translators developed by Translated srl
- Sovereignty score 94 out of 100translate5Germany · Self-hosted / open sourceOpen-source translation management platform (AGPLv3) by MittagQI in Germany, installable in the cloud or on-premises.
- Sovereignty score 94 out of 100WeblateCzechia · EU sovereignOpen-source web-based continuous localization platform for developers
- Sovereignty score 92 out of 100TolgeeCzechia · Self-hosted / open sourceCzech open-source (Apache 2.0) developer-friendly localisation platform.
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