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Mattermost vs Zulip: What are the differences?

Developers describe Mattermost as "Open-source, self-hosted, Slack alternative". Mattermost is modern communication from behind your firewall. On the other hand, Zulip is detailed as "Powerful open source team chat". Zulip is powerful, open source team chat that combines the immediacy of real-time chat with the productivity benefits of threaded conversations Zulip allows busy managers and others in meetings all day to participate in their teams chats..

Mattermost and Zulip can be categorized as "Group Chat & Notifications" tools.

"Open source" is the top reason why over 54 developers like Mattermost, while over 57 developers mention "Open source" as the leading cause for choosing Zulip.

Mattermost and Zulip are both open source tools. It seems that Mattermost with 15.4K GitHub stars and 3.14K forks on GitHub has more adoption than Zulip with 10.1K GitHub stars and 3.11K GitHub forks.

According to the StackShare community, Mattermost has a broader approval, being mentioned in 38 company stacks & 24 developers stacks; compared to Zulip, which is listed in 7 company stacks and 9 developer stacks.

Decisions about Mattermost and Zulip
Luke Carr
CEO at Omnio Interactive · | 16 upvotes · 82.1K views

We tried out a handful of communication tools including Slack, Microsoft Teams, and Google Hangouts Chat, before settling with Mattermost.

The customisability offered through your server's system console is unrivalled and in some ways overwhelming with the sheer amount of options that you're provided with.

All communication tools share 99% of their UI with each other, and Mattermost is no different, but that's not a bad thing. It also seems to have a less cluttered interface than the others we had tried, although I can't pinpoint the specific design choice that is the reason for this.

The fact that we can have control over all of our data (we're self-hosting it through AWS on a single EC2 instance) is also a great plus which none of the options that we looked into offered.

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What are some alternatives to Mattermost and Zulip?
Imagine all your team communication in one place, instantly searchable, available wherever you go. That’s Slack. All your messages. All your files. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. All together.
Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework. It is a great solution for communities and companies wanting to privately host their own chat service or for developers looking forward to build and evolve their own chat platforms.
Riot brings custom tags to all browsers. Think React + Polymer but with enjoyable syntax and a small learning curve.
HipChat is a hosted private chat service for your company or team. Invite colleagues to share ideas and files in persistent group chat rooms. Get your team off AIM, Google Talk, and Skype — HipChat was built for business.
Free chat rooms for your public repositories. A bit like IRC only smarter. Chats for private repositories as well as organisations.
See all alternatives