Open-source Matecat alternatives

Weblate is a localization tool you use in the browser, closely integrated with version control. You connect your repository, translators work in the browser, and new strings and finished translations flow between the repository and Weblate so localization keeps pace with development.

The project website emphasizes quality and control. Translators get context, shared terminology and quality checks, and teams can work exclusively with people or add AI and machine translation. Repository topics reference gettext, continuous localization and crowdsourcing. It is used by both community projects and commercial products, and the Weblate project itself, along with many open-source applications, are translated on its hosted service.

Weblate is written in Python with Django and licensed under GPL-3.0. The homepage describes it as free to use, inspect, modify and share, suitable for organizations and communities. You can run it yourself or choose hosting and support options, which are compared on the vendor's hosting page.

Pontoon is a translation management system developed and used by the Mozilla localization community. It is built to support open-source localization that is driven by volunteers, and it works with version control systems for storing translations so that work done in the web interface flows back to project repositories.

Users translate strings in a browser-based translation app, while teams and project managers use dashboards to track progress across locales. Mozilla runs staging and production servers of its own, and the documentation explains how Mozilla deploys Pontoon as a Docker image on Google Cloud Platform, noting that other platforms may need adaptation. A separate developer setup is provided for local testing but is not suitable for production.

The software is written in Python and JavaScript on the Django framework and is licensed under the New BSD licence. Organizations can host their own instance, and GitHub Discussions is where feedback, support and third-party deployments are discussed. It suits open-source projects and communities that want to organize volunteer translators without paying for a commercial localization platform.