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Zulip

Logo: The Zulip team, Public domain, via Wikimedia Commons3

Open source chat and collaboration software

Zulip is an open source chat and collaborative software created by Jeff Arnold, Waseem Daher, Jessica McKellar, and Tim Abbott in 2012. It is one of the free and open source alternatives to Slack.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Aug 2012Founded1

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Zulip screenshot of demo content
Photo: Zulip contributors, Apache License 2.0, via Wikimedia Commons4

Zulip is an open source chat and collaborative software created by Jeff Arnold, Waseem Daher, Jessica McKellar, and Tim Abbott in 2012. It is one of the free and open source alternatives to Slack.2

The story

Founded by Jessica McKellar on Aug 2012.1

Leadership

Who has led Zulip, and when. Pick a name to see everywhere that person has worked.

Timeline

  1. Aug 2012Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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