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Argos Translate

Argos Translate is a free, open-source translation library written in Python that can run offline.

Place
#103 of 156
Score
6.1
Argos Translate's website

What Argos Translate is

Argos Translate is a free, open-source translation library written in Python that can run offline. It uses OpenNMT and can be used as a Python library, command-line tool, or GUI application. Language models are distributed as .argosmodel archives, and users need to install the requested language pair before translating. The project lists languages including Arabic, Chinese, English, French, Hindi, Japanese, and Spanish. If there is no direct installed model for a pair, Argos can route translation through an installed intermediate language, though translation quality may decrease. The maker describes LibreTranslate as an API and web app built on Argos Translate, and links to a file-translation tool for .txt, .odt, .odp, .docx, .pptx, .epub, and .html files. The project is dual licensed under MIT or Creative Commons CC0. The maker links to a community forum and lists machine-translation support or consulting among its contract services. The open-source plan is listed as free.

Good

  • Can translate offline
  • Usable as a Python library, CLI, or GUI
  • Supports custom trained and packaged language models
  • Can route through intermediate installed languages
  • Dual licensed under MIT or CC0

Watch out

  • Each requested language pair must be installed first
  • Intermediate-language translation may reduce quality

Who it suits

Argos Translate may suit developers or users who want offline translation through Python, a command line, or a GUI. It can also fit workflows that use installed language models or build on the library through LibreTranslate.

Verdict

Argos Translate offers offline translation in several forms, with language models users install as needed. Its flexible use comes with a practical constraint: the required pair must be available, directly or through an intermediate language.

Plans and prices

From Argos Translate's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
Open sourceFreeOffline translation library · Python, command-line, and GUI use

The facts

Each one read from Argos Translate's own pages, with the date it was checked.

What it does

API access
Yeschecked 23 Sep 2026
Custom models
The maker says users can train and package custom language models.checked 9 Oct 2026
File translation
The maker links to a tool for translating .txt, .odt, .odp, .docx, .pptx, .epub, and .html files using Argos Translate.checked 9 Oct 2026
Indirect language pairs
It can pivot through installed intermediate languages for pairs without a direct installed translation, with some loss of translation quality.checked 9 Oct 2026
Language coverage
The project README lists languages including Arabic, Chinese, English, French, Hindi, Japanese, Spanish, and others.checked 9 Oct 2026
Language models
It installs language model packages distributed as .argosmodel archives.checked 9 Oct 2026
Licensing
The project README says Argos Translate is dual licensed under MIT or Creative Commons CC0.checked 9 Oct 2026
Notable requirement
A requested language pair must be installed before using it for translation.checked 9 Oct 2026
Offline use
The project describes itself as offline capable, and the maker describes Argos Translate as an offline translation library.checked 9 Oct 2026
Purpose
Argos Translate is an open-source offline translation library written in Python.checked 9 Oct 2026
Support
The maker links to a community forum and lists machine translation support or consulting among its contract services.checked 9 Oct 2026
Translation engine
It uses OpenNMT for translations.checked 9 Oct 2026
Ways to use it
It can be used as a Python library, command-line tool, or GUI application.checked 9 Oct 2026

Where it runs

API and web app
The maker describes LibreTranslate as an API and web app built on top of Argos Translate.checked 9 Oct 2026

Money

Free plan
Yeschecked 23 Sep 2026

The company

Headquarters
Ithaca, New York, United Stateschecked 28 Sep 2026

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