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Slack vs Pumble: catalog facts
Slack	Pumble
Freemium Free plan available, with paid plans for more features.	Freemium Free with unlimited users and message history; paid plans are sold for businesses.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS
Channels keep team conversations organized Large range of app integrations	Unlimited users and message history on the free offering Channels, threads, calls and recording in one app
Closed source hosted service Many features and AI tools sit behind paid plans	Hosted service only, with no self-hosting option Closed source
Downloadable app, Web application, Hosted service	Downloadable app, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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