Open-source alternatives to Microsoft Translator

Microsoft Translator in the AI category. These are the open alternatives we recommend looking at.

Machine translation API that runs fully locally. Quality is often lower than DeepL – test it on your own texts.

AGPL-3.0Network copyleft (AGPL)

SaaS: Yes, with conditionsClosed product: No

Python library and app for machine translation that works offline.

MITPermissive

SaaS: YesClosed product: Yes

Fast inference engine for Transformer models, often used for translation and speech recognition.

MITPermissive

SaaS: YesClosed product: Yes

The code and training pipeline behind the translation models in Firefox, which translate locally in the browser.

MPL-2.0Weak copyleft

SaaS: YesClosed product: Yes, with conditions

Translation model from Meta that translates directly between 100 languages without going through English. The model card lists Swedish support.

MITPermissive

SaaS: YesClosed product: Yes

Translation model from Google trained on over 400 languages. The model card lists Swedish support.

SaaS: YesClosed product: Yes

Small translation model from the University of Helsinki that translates from Swedish to English.

SaaS: YesClosed product: Yes

Small translation model from the University of Helsinki that translates from English to Swedish.

SaaS: YesClosed product: Yes

This is guidance, not legal advice (inte juridisk rådgivning). Check with a lawyer before deciding.

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