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Mattermost vs Cisco Jabber: catalog facts
Mattermost	Cisco Jabber
Freemium The desktop client is free and open source. The Mattermost server has a free self-hosted…	Free The client is a free download from Cisco.
Windows, macOS, Linux	Windows, macOS, Android, iOS
The server is self-hosted, so message data never leaves your infrastructure Server dropdown lets one client connect to several Mattermost instances	Available on desktop and mobile Separate VDI edition for virtual desktops
Needs a Mattermost server, which is real infrastructure to run Electron, so memory use is high for a chat client	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.