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Most buyers should pick Zulip.
Choose Zulip if your priority is async team chat organized by topic, with a free cloud tier or self-hosting and published paid rates. Its Standard cloud plan is $8 per user monthly, or $6.67 annually; self-hosted Basic is $3.50 monthly, with no annual rate listed. Choose Mattermost for mission-critical operations, playbooks, task boards, or self-hosted, private-cloud, and air-gapped deployments. Its Entry tier is free, but commercial pricing requires a quote, making budget comparisons harder.
01Side by side
| Zulip | Mattermost | |
|---|---|---|
| Starting price | Free; self-hosted Basic starts at $3.50/user monthly. | Free Entry; commercial plans require a custom quote. |
| Free plan | Cloud: 10,000-message search history and 5 GB storage. | Entry: up to 100 users, 10,000-message channel history. |
| Best for | Teams wanting organized, asynchronous conversations. | Teams running mission-critical operations and workflows. |
| Core strength | Topic-based conversations, contextual replies, and unread inbox. | Secure messaging, playbooks, task boards, and AI agents. |
| Learning curve | Topics may take adjustment, according to the review. | No specific learning-curve detail supplied. |
| Integrations/data | Hundreds of integrations; open-source self-hosting supports data sovereignty. | Self-hosted, private-cloud, air-gapped options; server federation. |
| Team/seat costs | Plus requires 10 users; Business self-hosted requires 25. | Entry supports 100 users; commercial seat pricing is unpublished. |
| Support | Paid plans list priority, email, chat, or phone support. | Premier Support is an add-on; pricing is unpublished. |
Zulip Choose Zulip if
- Choose Zulip if topic-based async chat fits your team.
- Choose Zulip if you want published paid rates.
- Choose Zulip if you need open-source self-hosting.
Mattermost Choose Mattermost if
- Choose Mattermost if your team runs mission-critical operations.
- Choose Mattermost if you need air-gapped deployment options.
- Choose Mattermost if playbooks and task boards matter.
02Pricing compared
Zulip is easier to budget for: its Standard cloud plan costs $8 per user monthly or $6.67 per user monthly with annual billing. It includes unlimited search history and 5 GB of storage per user. The free cloud plan caps searchable history at 10,000 messages and total storage at 5 GB. For self-hosting, Basic is $3.50 per user monthly; no annual rate is listed. Mattermost Entry is free for up to 100 users, with caps including 10,000-message channel history, 1,000 board cards and five active playbook runs per month. Its commercial plans require a quote, are prepaid annual seat subscriptions, and have no published monthly prices. Mattermost also lists a one-hour trial. If predictable pricing matters, Zulip has the clearer paid options.
03Features and depth
Zulip is built around topic-based conversations: messages start with a brief topic, replies stay in context, and an unread inbox helps surface conversations that need attention. Its focused-conversation design suits teams that want to keep separate discussions from blending into one stream of chat. Teams can use Zulip Cloud or self-host its open-source software, and the product supports moves from tools including Slack and Teams.
Mattermost covers more than team messaging. Its feature list includes searchable channels, threads and direct messages, plus playbooks for incident response and change management with checklists, SLA timers and escalations. It also lists task boards, calls and screen sharing, live transcription, AI summaries and AI agents that can use a chosen provider or a self-hosted model. Mattermost says it can run in self-hosted, private-cloud and air-gapped environments. Choose Zulip for topic-organized async chat; choose Mattermost when operations workflows and deployment control are central requirements.
04Ease of use and learning curve
Zulip’s topic-first approach can take adjustment if your team expects every message to land in a single flowing chat. Its review notes a learning curve around topics, so plan to introduce the format and agree on how the team names conversations. The tradeoff is clearer context for ongoing discussions.
Mattermost has familiar chat elements such as channels, threads and direct messages, but its listed scope also includes playbooks, boards, calls and AI features. That breadth gives teams more capabilities to assess, rather than a simpler chat-only choice. We’d compare the workflows your team will actually use and the deployment model you need before choosing. The available information does not establish that one product is easier for every team.
Questions people ask
Which is cheaper, Zulip or Mattermost?
Zulip publishes paid rates: Standard cloud is $8 per user monthly or $6.67 with annual billing, while self-hosted Basic is $3.50 monthly. Mattermost Entry is free within its limits, but commercial plan prices require a quote and are not published. Compare your needs against Entry’s caps before treating it as a fit.
Does Zulip have a free plan?
Yes. Zulip offers a free cloud plan with 10,000 messages of search history, 5 GB total file storage, hundreds of integrations and guest accounts. It also lists free self-hosting for eligible communities and organizations, with different mobile-notification terms for eligible communities and other organizations.
Can Zulip or Mattermost be self-hosted?
Both offer self-hosting. Zulip provides open-source software and also offers Zulip Cloud. Mattermost lists self-hosted deployments alongside private-cloud and air-gapped environments. The published pricing information lists Zulip self-hosted rates, while Mattermost’s commercial plans require a quote.
Which is better for replacing Slack?
Zulip says teams can move from tools including Slack and Teams, and its topic-based conversations are a fit for teams prioritizing organized async discussion. Mattermost’s listed strengths include operational playbooks, task boards and deployment options such as air-gapped environments. The better fit depends on whether chat organization or operations workflows matter more.