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Argos Translate

argosopentech.com

Free plan LinuxAPISelf-hosted
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Spec score 8.3 #46 of 156 in Translation Software

What it is

Argos Translate is a free, open-source Python translation library designed for offline use. It uses OpenNMT and can run as a Python library, command-line tool or GUI application. Language models are installed as .argosmodel archives, and the requested language pair must be installed before translation. Listed languages include Arabic, Chinese, English, French, Hindi, Japanese and Spanish, among others. When a direct pair is unavailable, Argos can route translation through an installed intermediate language, though this may reduce translation quality. Users can train and package custom language models. The maker describes LibreTranslate as an API and web application built on Argos Translate. A linked tool translates .txt, .odt, .odp, .docx, .pptx, .epub and .html files. The project is dual licensed under MIT or Creative Commons CC0. Argos Translate provides API access, supports Linux self-hosting and is associated with a community forum and machine-translation support or consulting services.

Spec sheet

Purpose
Argos Translate is an open-source offline translation library written in Python.Read 9 Oct 2026 · argosopentech.com
Free plan
YesRead 23 Sep 2026 · argosopentech.com
Support
The maker links to a community forum and lists machine translation support or consulting among its contract services.Read 9 Oct 2026 · argosopentech.com
Headquarters
Ithaca, New York, United StatesRead 28 Sep 2026 · argosopentech.com
API access
YesRead 23 Sep 2026 · argosopentech.com
API and web app
The maker describes LibreTranslate as an API and web app built on top of Argos Translate.Read 9 Oct 2026 · argosopentech.com
Custom models
The maker says users can train and package custom language models.Read 9 Oct 2026 · argosopentech.com
File translation
The maker links to a tool for translating .txt, .odt, .odp, .docx, .pptx, .epub, and .html files using Argos Translate.Read 9 Oct 2026 · argosopentech.com
Indirect language pairs
It can pivot through installed intermediate languages for pairs without a direct installed translation, with some loss of translation quality.Read 9 Oct 2026 · github.com
Language coverage
The project README lists languages including Arabic, Chinese, English, French, Hindi, Japanese, Spanish, and others.Read 9 Oct 2026 · github.com
Language models
It installs language model packages distributed as .argosmodel archives.Read 9 Oct 2026 · argosopentech.com
Licensing
The project README says Argos Translate is dual licensed under MIT or Creative Commons CC0.Read 9 Oct 2026 · github.com
Notable requirement
A requested language pair must be installed before using it for translation.Read 9 Oct 2026 · github.com
Offline use
The project describes itself as offline capable, and the maker describes Argos Translate as an offline translation library.Read 9 Oct 2026 · argosopentech.com
Translation engine
It uses OpenNMT for translations.Read 9 Oct 2026 · argosopentech.com
Ways to use it
It can be used as a Python library, command-line tool, or GUI application.Read 9 Oct 2026 · argosopentech.com

Plans and prices

Open source Free Offline translation library · Python, command-line, and GUI use Read 9 Oct 2026 · argosopentech.com

Every Argos Translate plan and price →

Strong points and limits

Strong points

  • Free offline translation library
  • Python, command-line and GUI access
  • Custom language models can be packaged
  • Supports indirect language-pair translation
  • Dual MIT or CC0 licensing

Limits

  • Language pair must be installed first
  • Indirect translation may reduce quality
  • Model packages use .argosmodel archives

Who it suits

It suits developers and users wanting offline translation through Python, command-line or GUI workflows. It also fits projects needing self-hosted APIs, custom models or supported document-file translation.

Verdict

Argos Translate offers offline, self-hosted translation with several interfaces, installable language models and custom-model support. Its language-pair installation requirement and possible quality loss through intermediary languages are important setup considerations.

Where Specifiction places it

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