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Rocket.Chat Desktop vs Flock: catalog facts
Rocket.Chat Desktop	Flock
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Sign-up is self-serve; check the site for current plans.
Windows, macOS, Linux	Web
Provides desktop packages for Windows, macOS and Linux.	Channels for organising team discussion Built-in voice and video calls with screen sharing
Workspace access and server licensing are separate from the desktop client.	Proprietary hosted service; data lives on the vendor's servers Aimed at organisations rather than personal use
Downloadable app	Downloadable app, Web application, Hosted service
Open source	Closed source
License: MIT	License not stated
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 22, 2026	Official website Full listing and sources Checked September 24, 2026

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