GoKawiilWe’re excited to announce the release of Zulip Server 12.0, containing hundreds of new features and bug fixes: end-to-end encryption for mobile push notifications, a major upgrade for Docker, configurable image previews, and much more! Almost 5,500 new commits have been merged across the project since the 11.0 release in August 2025.
Zulip is an organized team chat application ideal for both live and asynchronous communication. With Zulip, you own your data: it’s 100% open-source software, with easy migration between cloud hosting and self-hosting, plus a powerful API.
Zulip is developed in collaboration with our community. A total of 160 people contributed commits to Zulip since the 11.0 release, bringing the project to 1,680 code contributors. Zulip is remarkable for its number of major contributors, with 99 people who’ve contributed 100+ commits.
Huge thanks to everyone who’s contributed to Zulip over the last several months, whether by writing code and documentation, reporting bugs, suggesting features, translating, supporting us financially, participating in discussions in the Zulip development community, or just sharing ideas! We could not do this without the hundreds of people who help the project.
Project highlights
Today marks a release of the Zulip server and web application. We’d also like to share news and updates for the project as a whole since the 11.0 release last August:
Mobile app
Zulip now encrypts your push notifications end to end from the Zulip server to your mobile device. The encryption happens seamlessly when you use Zulip Server 12.0 with an up-to-date version of the Zulip mobile app for Android or iOS. We’re excited about how this upgrade makes Zulip’s security model simpler and more robust, offering self-hosted organizations complete control over their data.
We’ve been busy with lots of other improvements to the mobile app too, in eight mobile releases since the 11.0 release: easier navigation, managing your channel subscriptions, support for new Zulip features like inline images and channel folders, and other improvements too numerous to mention.
Next up, our mobile agenda includes making notifications on iOS more helpful, a “recent conversations” view like Zulip has on the web, and a long list of other features. As always, your feedback helps us choose what to build next; if there’s something you’re especially keen to see added or changed, please let us know.
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