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Chanty vs Mattermost: catalog facts
Chanty	Mattermost
Freemium Free to start, with paid plans listed on the pricing page.	Freemium The desktop client is free and open source. The Mattermost server has a free self-hosted…
Web	Windows, macOS, Linux
Free guest access for external contacts States HIPAA, GDPR and SOC 2 Type II compliance	The server is self-hosted, so message data never leaves your infrastructure Server dropdown lets one client connect to several Mattermost instances
Proprietary hosted service only Growing focus on AI agents may not suit everyone	Needs a Mattermost server, which is real infrastructure to run Electron, so memory use is high for a chat client
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	Account needed
Needs internet	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.