The founder and three senior team members of Zulip are joining Anthropic:
Tim Abbott, Alya Abbott, Greg Price, and Alex Vandiver

And they are "donating the company" to a new non-profit #Zulip Foundation:
with the first three above as the board (plus Josh Triplett) and "Interim President" Kim Vandiver (notice the same last name as the other person who's joining Anthropic)

https://blog.zulip.com/2026/05/15/announcing-zulip-foundation/

via @mary_ext

Announcing the Zulip Foundation

Today marks a major transition for the Zulip open-source project and for Kandra Labs, the company behind it: I’m stepping back from full-time Zulip leadership to join Anthropic, alongside three senior team members, and we’re donating the company to a…

^{The Zulip Blog}