Learn how Mattermost and Zulip differ in their key features, development activity, technology stack and community adoption, so you can decide which of these team chat & messaging tools is best for you.
Last 30 days
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Last 30 days
Last commit
Repository age
Version
License
Self-hosted
Repository

Both Mattermost and Zulip have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.
Mattermost leads in popularity with 38,890 stars vs 25,765 stars for Zulip. The 51% higher star count indicates stronger community adoption. In terms of developer contributions, Zulip has 10,110 forks, indicating strong developer engagement.
Mattermost and Zulip are moving at much the same rate, adding 332 stars and adding 208 stars respectively over the last 30 days (+0.9% vs +0.8%). Neither is pulling away from the other on momentum alone.
Both projects show recent activity, with Mattermost last updated 6 hours ago and Zulip 5 hours ago.
Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript. However, they differ in their additional technology choices: Mattermost uses JSX, SCSS, Golang while Zulip leverages Python, Ruby.
Both projects started around the same time, with Mattermost beginning 11 years ago and Zulip 11 years ago.
Zulip is licensed under Apache-2.0, while Mattermost's license terms are not publicly specified.
Both tools serve similar use cases in Team Chat & Messaging. However, they also have distinct specializations: Mattermost also focuses on Collaborative Workspaces, Encrypted Communication.
Both Mattermost and Zulip offer self-hosting capabilities, giving you full control over your data and infrastructure.
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