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Zulip vs Cisco Jabber: catalog facts
Zulip	Cisco Jabber
Freemium The server and clients are free and open source and can be self-hosted at no cost. Zulip…	Free The client is a free download from Cisco.
Windows, macOS, Linux, Android	Windows, macOS, Android, iOS
Topic-based threading inside channels, which makes catching up genuinely practical Self-hostable, or hosted, with free plans for open-source communities	Available on desktop and mobile Separate VDI edition for virtual desktops
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	Mainly useful inside organizations that run Cisco services Official page gives little detail about features
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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