Mattermost vs Zulip
A side-by-side comparison of two self-hosted team chat options — licensing, setup difficulty, resource needs, and what each one replaces.
Mattermost
Secure collaboration for developer teams
VS
Zulip
Threaded team chat that combines email and chat
| Feature | Mattermost | Zulip |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 99 · Excellent | 97 · Excellent |
| Category | Team Chat | Team Chat |
| License | AGPL-3.0 | Apache-2.0 |
| Language | TypeScript | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 2,048 MB |
| Deployment | docker, bare-metal, kubernetes | docker, bare-metal |
| GitHub stars | ★ 39,150 | ★ 25,938 |
| First released | 2016 | 2015 |
| Replaces | Slack, Microsoft Teams | Slack, Microsoft Teams |
What are Mattermost and Zulip?
Mattermost
Mattermost is an open-source, self-hostable messaging platform focused on secure collaboration for technical teams. It targets organizations with privacy or compliance needs. It is deployed via Docker, packages, or Kubernetes.
- Channels, threads and search
- Strong DevOps integrations
- Self-hosted and on-prem focus
- Playbooks and boards
Zulip
Zulip is an open-source team chat application with a unique topic-based threading model that organizes conversations clearly. It targets teams that want focused, asynchronous-friendly discussions. It is deployed via Docker or an installer.
- Topic-based threading model
- Great for async discussion
- Powerful search
- Many integrations
Mattermost vs Zulip: key differences
Mattermost is written in TypeScript, while Zulip is built with Python. Licensing differs — AGPL-3.0 for Mattermost versus Apache-2.0 for Zulip.
Why pick each one
Choose Mattermost if…
- Great for technical teams
- Strong security posture
- Good integrations
Watch out for
- Enterprise features gated
- Needs a real database
Choose Zulip if…
- Excellent conversation organization
- Strong async workflow
- Fully open source
Watch out for
- Threading model takes adjustment
- Heavier install
Frequently asked questions
Is Mattermost or Zulip better?
Neither is universally better. Mattermost has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Mattermost and Zulip free and open-source?
Yes. Mattermost is licensed under AGPL-3.0 and Zulip under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Mattermost and Zulip with Docker?
Mattermost: yes. Zulip: yes.