Zulip Server 12.0 released with end-to-end encryption, Docker upgrades, and configurable image previews
By
Tim Abbott
Crackling crust, pillowy middle. The kind of bagel that earns a second cup of coffee.
Summary
Zulip Server 12.0 has been released, featuring hundreds of new features and bug fixes including end-to-end encryption for mobile push notifications, a major Docker upgrade, and configurable image previews. The release incorporates nearly 5,500 new commits since version 11.0 (August 2025). Zulip is an open-source organized team chat application designed for both live and asynchronous communication, with a focus on data ownership and easy migration.
Key quotes
· 3 pulledWe're excited to announce the release of Zulip Server 12.0, containing hundreds of new features and bug fixes
Almost 5,500 new commits have been merged across the project since the 11.0 release in August 2025.
With Zulip, you own your data: it's 100% open-source software, with easy migration between c
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