Zulip founder departs for Anthropic, donates company to new nonprofit foundation

Tim Abbott, founder of the open-source team chat platform Zulip, is stepping back from full-time leadership at Kandra Labs to join Anthropic, bringing three senior team members with him. The company is being donated to a newly created independent nonprofit, the Zulip Foundation, which will take full ownership of Kandra Labs with no other stockholders or debt. The governance model echoes structures used by Mozilla, Signal, and Wikipedia, with an initial board including Abbott, Greg Price, Alya Abbott, and Rust contributor Josh Triplett.

The foundation formalizes Zulip’s long-stated values around data privacy and product focus, making them durable beyond any single CEO’s tenure. It also unlocks new funding avenues that were previously off-limits, including grants, tax-deductible individual donations, and public fundraising campaigns that would have been awkward under private company ownership. Kandra Labs will continue operating Zulip Cloud and supporting self-hosted customers, with Kim Vandiver joining as Interim President to manage the transition while a global search for permanent leadership runs.

Abbott frames the move as both a vote of confidence in Zulip’s operational stability—calling the platform the most stable it has ever been after a year of bug-fixing focus—and a personal choice driven by Anthropic’s mission around responsible AI development. A short-term dip in development velocity is expected as the organization adapts.