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Zulip vs Google Chat: catalog facts
Zulip	Google Chat
Freemium The server and clients are free and open source and can be self-hosted at no cost. Zulip…	Freemium Free with a Google account; business features come with paid Google Workspace plans.
Windows, macOS, Linux, Android	Web
Topic-based threading inside channels, which makes catching up genuinely practical Self-hostable, or hosted, with free plans for open-source communities	Integrated with Gmail, Drive and Docs Spaces with threaded conversations
The topic model takes getting used to and needs team discipline to work The desktop client shares most of its code with the web app, so it inherits its quirks	Requires a Google account Hosted by Google with no self-hosting option
Downloadable app	Web application, Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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