The best open source alternative to Crowdin is Weblate. If that doesn't suit you, our users have ranked more than 50 alternatives to Crowdin and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Crowdin are LibreTranslate, Poedit, Tolgee and Apertium.
Weblate is a web based translation tool with tight VCS integration. It features simple and clean user interface, propagation of translations across components, consistency checks and automatic linking to source files.
Free and Open Source Translation API. 100% self-hosted, no limits, no ties to proprietary services. Built on top of Argos Translate.
Poedit is cross-platform gettext catalogs (.po files) editor. It is built with wxWidgets toolkit and can run on any platform supported by it (although it was only tested on Unix with GTK+ and Windows). It aims to provide more convenient approach to editing catalogs than...
You no longer have to worry about choosing the right i18n library, editor, or platform. Tolgee is the only tool you need to translate your web-based project to any language you wish.
Apertium is a rule-based machine translation platform. It is free software and released under the terms of the GNU General Public License.
Pontoon is a translation management system used and developed by the Mozilla localization community. It specializes in open source localization that is driven by the community and uses version-control systems for storing translations.
Online translation platform. Pootle allows your professional or community translators to easily complete localization tasks. For you it becomes easier to manage and monitor the distributed work.
Zanata is a web-based system for translators, content creators and developers to manage localisation projects.
Lokalize is the localization tool for KDE software and other free and open source software. It is also a general computer-aided translation system (CAT) with which you can translate OpenDocument files (*.odt).
LocalTranslate is an offline translation application that uses Firefox’s neural translation models to perform high-quality translations locally on your device.
A fast and lightweight AI powered desktop translation application built with Rust and Tauri that provides instant translation between multiple languages with global hotkey support, system tray integration, and a beautiful user interface.
OmegaT is a free translation memory application written in Java. It is a tool intended for professional translators. It does not translate for you!
Czechia
EU
Spain
United States
South Africa
Australia
Germany
Norway
FOSS, works well, has a lot of cool features.