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Campfire vs Mattermost: catalog facts
Campfire	Mattermost
Free No subscription; the code is published on GitHub.	Freemium The desktop client is free and open source. The Mattermost server has a free self-hosted…
Web, Self-hosted	Windows, macOS, Linux
Installs on your own server with one command Familiar layout for people coming from Slack or Teams	The server is self-hosted, so message data never leaves your infrastructure Server dropdown lets one client connect to several Mattermost instances
You have to run and maintain the server yourself Covers chat basics rather than a large integration ecosystem	Needs a Mattermost server, which is real infrastructure to run Electron, so memory use is high for a chat client
Self-hosted	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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