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Zulip vs Nextcloud Talk: catalog facts
Zulip	Nextcloud Talk
Freemium The server and clients are free and open source and can be self-hosted at no cost. Zulip…	Free Free and open source as part of a Nextcloud server you host.
Windows, macOS, Linux, Android	Android, Web, Self-hosted
Topic-based threading inside channels, which makes catching up genuinely practical Self-hostable, or hosted, with free plans for open-source communities	Runs on your own server Chat, calls and webinars in one app
The topic model takes getting used to and needs team discipline to work The desktop client shares most of its code with the web app, so it inherits its quirks	Needs a Nextcloud server to use Setting up reliable video calls takes extra server work
Downloadable app	Downloadable app, Web application, Self-hosted
Open source	Open source
License: Apache-2.0	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.