Open-source Realtime Messaging tools

Three things to check when comparing realtime messaging tools

License bucket

Permissive, weak-copyleft, strong-copyleft or source-available — the bucket decides whether you can modify, embed or host the project as a service. Each alternatives page groups its projects by bucket; confirm the LICENSE file in the linked repository.

Last push

The last-pushed date on each card comes from the GitHub public API as of the last daily data refresh. Compare it across the projects in a category before reading feature lists.

Migration path

Read the migration tips on each alternatives page, then check the project's own documentation for an importer or export format before planning a cut-over. Pages without migration tips omit that section rather than fill it in.