Zulip free for open source — what you get and how to apply

Zulip Cloud Standard (the paid team chat plan, including full message history) free for open-source projects; Zulip sponsors hundreds of open-source projects including Rust and Lean.

Eligibility: for the organization; Open-source project communities; formal criteria not published on the page — sponsorship requests are reviewed. Self-hosting the 100% open-source Zulip server is an alternative.

How to apply: Create a Zulip Cloud organization and use the "Request sponsorship" flow (or contact sales@zulip.com).

last verified 2026-07-06