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Cisco JabberMattermost
Free

The client is a free download from Cisco.

 Freemium

The desktop client is free and open source. The Mattermost server has a free self-hosted…

Windows, macOS, Android, iOS Windows, macOS, Linux
  • Available on desktop and mobile
  • Separate VDI edition for virtual desktops
  • The server is self-hosted, so message data never leaves your infrastructure
  • Server dropdown lets one client connect to several Mattermost instances
  • Mainly useful inside organizations that run Cisco services
  • Official page gives little detail about features
  • Needs a Mattermost server, which is real infrastructure to run
  • Electron, so memory use is high for a chat client
Downloadable app Downloadable app
Closed source Open source
License not stated License: Apache-2.0
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked October 1, 2026

Checked September 21, 2026

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