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Mattermost

Self-hosted team messaging with playbooks, calls and boards

Free planTeam ChatChecked Oct 5, 20264.8 on the App Store
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Mattermost, as pictured on mattermost.com
How Mattermost presents itself. Image from mattermost.com.

What is Mattermost?

Mattermost is an open-core, self-hosted collaboration platform built around channel-based messaging, with playbooks for repeatable processes, calls with screen sharing, and Kanban-style boards. It is aimed at security-sensitive organizations and can run in a private cloud or on air-gapped networks. Small teams can use the free Entry mode or the open-source Team Edition, while the Professional, Enterprise and Enterprise Advanced licenses are quoted by sales.

Mattermost has a free plan. See every plan

Good for

  • Organizations that must keep chat on their own servers or air-gapped networks
  • DevOps and security teams that run incident response from chat
  • Small technical teams comfortable hosting their own server

Worth knowing

  • No prices are published: Professional, Enterprise and Enterprise Advanced are quoted by sales and sold as prepaid annual seat subscriptions.
  • Entry shows only the latest 10,000 channel messages and has community support only; the vendor suggests it for teams of fewer than 50 users.
  • It is self-hosted by design; the only vendor-hosted option described is single-tenant Mattermost Cloud Enterprise, arranged through sales.
  • Team Edition has no single sign-on, and the vendor does not recommend it for government or sensitive commercial workloads.

Key features

Channel-based messaging
1-1 and group messages, public and private channels, threaded discussions, file sharing and search across web, desktop and mobile, in 20 languages.
Playbooks
Repeatable playbooks for incident response, change management and compliance, with conditional checklists and escalation. The pricing page lists workflow automation from Enterprise.
Calls and screen sharing
1:1 audio calls with screen sharing are in every paid package, and group calls support about 50 concurrent users per self-hosted server. A 40-minute call limit is planned for Entry.
Boards
Kanban, table, calendar and gallery boards for assigning and tracking tasks next to the conversation. The pricing page lists work management from Enterprise.
AI agents
Agents summarize conversations and take actions using an LLM provider the customer chooses, or a self-hosted model in air-gapped environments.
Integrations and API
A REST API with an OpenAPI 3.0 spec, webhooks, slash commands and a plugin platform, with prebuilt integrations for tools such as Jira, GitHub and GitLab.

Mattermost pricing

Starts at
Not published
Free plan
Mattermost Entry is a free self-hosted mode limited to 10,000 viewable channel messages with community support. The open-source Team Edition is also free for under 250 users.
Free trial
1-hour preview environment of Enterprise Advanced; a trial can also be activated on a self-hosted server.
Entry$0Free mode of the Enterprise Edition: Enterprise Advanced features with 10,000 viewable messages, community support, and no compliance or high availability.
Team Edition$0Open-source, MIT-licensed edition for small teams and personal use under 250 activated users, without single sign-on.
ProfessionalCustomFor teams of up to 250 users: single sign-on, AD/LDAP sync, guest accounts and next-business-day support. Sold as prepaid annual seats.
EnterpriseCustomAdds workflow automation, work management boards, compliance and data retention tools, federated communications and high availability.
Enterprise AdvancedCustomAdds zero-trust attribute-based access controls, classification banners, burn-on-read messages and support for air-gapped environments.

Read from mattermost.com on Oct 5, 2026. Prices change, so confirm with Mattermost before you buy.

Pricing in detail

Ways to pay less

  • Nonprofit3-year Professional license for $250

    Eligible nonprofit and open-source organizations can apply for a 3-year self-hosted Mattermost Professional subscription for up to 1,000 users for a $250 fee.

    Stated on docs.mattermost.com

How people rate the Mattermost app

4.8

out of 5 for the iPhone and iPad app

5,646 ratings on the App Store in the United States, read Oct 5, 2026. It rates the app, not everything the product does. See the listing

Mattermost reviews, and where to read more

Works with

Who makes Mattermost

Mattermost, Inc. makes Mattermost, an open-core collaboration platform that organisations host themselves or run in private clouds. It sells paid editions above a free tier and aims them at national security and critical infrastructure organisations.

Based
Palo Alto, California (US office); eight locations listed in seven countriesmattermost.com
Ownership
Privately held. Privately held and backed by venture investors, among them Y Combinator Continuity, Redpoint, S28 Capital and Battery Ventures, according to its 2019 funding announcement. Its leadership page describes Mattermost, Inc. as the global parent company.mattermost.com
Funding
Raised $50 million in a Series B led by Y Combinator Continuity in June 2019, joined by Redpoint, S28 Capital and Battery Ventures, according to its own announcement. SiliconANGLE put the total raised at $73.5 million at the time.mattermost.comsiliconangle.com
Founders and leaders
Hiring
14 jobs listed: seven in sales, six in engineering and one in security, in the United States, Canada, the United Kingdom and Japan.mattermost.com
Partner program
Partner program with three kinds of partner: system integrators, resellers and deployment partners. Firms ask to join through a request form; no payment terms are published.mattermost.com
Lately
Follow

Read on Oct 6, 2026 from the company’s own pages and from news reports. What is not stated there is left out.

Mattermost alternatives

All Mattermost alternatives comparedAll team communication apps

Common questions

Is Mattermost free?

Mattermost has a free plan. Mattermost Entry is a free self-hosted mode limited to 10,000 viewable channel messages with community support. The open-source Team Edition is also free for under 250 users.

How much does Mattermost cost?

Mattermost lists 5 plans. Entry: $0. Team Edition: $0. Professional: custom pricing. Enterprise: custom pricing. Enterprise Advanced: custom pricing. Prices were read from mattermost.com on Oct 5, 2026.

What platforms does Mattermost work on?

Mattermost is available on Web, macOS, Windows, Linux, iOS and Android.

Does Mattermost offer any discounts?

Mattermost publicly lists the following: 3-year Professional license for $250.

How is Mattermost rated?

Mattermost's iPhone and iPad app averages 4.8 out of 5 from 5,646 ratings on the App Store in the United States, as read on Oct 5, 2026. That is the store's rating of the app, not a score from us.

Is Mattermost open source?

Yes. Mattermost is open source, according to its own site. It can also be run on a server of your own.

Does Mattermost have an API?

Yes. Mattermost offers a public API, according to its own site.

What does Mattermost integrate with?

Mattermost's listing names Jira, GitHub, GitLab, ServiceNow, Zoom, Microsoft Teams and Pexip. A listing names up to eight integrations, so it may connect to more.

Does Mattermost have a free trial?

Yes. 1-hour preview environment of Enterprise Advanced; a trial can also be activated on a self-hosted server.

Who makes Mattermost?

Mattermost is made by Mattermost. Privately held and backed by venture investors, among them Y Combinator Continuity, Redpoint, S28 Capital and Battery Ventures, according to its 2019 funding announcement. Its leadership page describes Mattermost, Inc. as the global parent company.

What are the alternatives to Mattermost?

The closest alternatives to Mattermost in our directory are Slack, Rocket.Chat, Zulip, Element and Microsoft Teams. Each one has a side-by-side comparison with Mattermost.

Sources for this page

The prices, plans, platforms and features above were read from these pages on Oct 5, 2026. What people say is linked where it appears.