Mattermost is a Team communication tool: Self-hosted secure collaboration.

How much does Mattermost cost?

Mattermost is Open source; there is no mandatory paid plan.

What are the best alternatives to Mattermost?

Community-listed alternatives to Mattermost include Rocket.Chat, PrivOS, Nextcloud, Netgsm.

What does Mattermost integrate with?

Mattermost integrates with GitLab, Jira, GitHub, Jenkins, Zoom, LDAP and more.

Which platforms does Mattermost support?

Mattermost is available on web, macos, windows, linux, ios, android.

Mattermost

Self-hosted secure collaboration

Open sourceTeam communication

Visit website

Mattermost is a team communication tool for Enterprise and Developers, offered as open source. Based in United States, founded in 2015. Popular alternatives include Rocket.Chat, PrivOS, Nextcloud.

About Mattermost

Mattermost is an open-source collaboration platform for technical and mission-critical teams. It started as an internal chat tool at a game company and is now developed by Mattermost, Inc. in Palo Alto. Organizations deploy it on their own servers, in private clouds or in fully air-gapped networks, which is why defense agencies, governments, banks and critical infrastructure operators use it.

The core is Slack-style team messaging with channels, threads, direct messages, file sharing, search, and desktop and mobile apps. On top of that come Playbooks for repeatable processes such as incident response, and integrations with GitHub, GitLab, Jira, Jenkins and other DevOps tools through webhooks, slash commands and plugins. Free self-hosted editions cover core messaging, though since version 11 (October 2025) the Entry edition shows only the latest 10,000 messages and Team Edition is capped at 250 users; Professional adds SSO, advanced permissions and guest accounts for a per-user fee; Enterprise adds compliance exports, data retention policies, high availability and advanced security.

Mattermost fits organizations that cannot put their conversations in a vendor-hosted cloud, and DevOps teams that want chat tied to their tooling. The trade-off is user experience and ecosystem: the interface is behind Slack, there are far fewer third-party apps, and self-hosting needs operational effort. Slack and Microsoft Teams are easier if data residency is not a constraint; Rocket.Chat is another open-source option, and Element, built on Matrix, adds federation and end-to-end encryption.

Key features of Mattermost

Self-hosted team chat
Playbooks for incidents
Boards
DevOps integrations
Compliance and security
Air-gapped deployment

Pros and cons

Pros

Full control and security
Open source
DevOps-focused
Air-gap capable

Cons

UX behind Slack
Self-hosting effort
Smaller app ecosystem
Enterprise pricing

Mattermost pricing

Mattermost uses a open source model.

Plan	Price	Includes
Free	$0	Self-hosted, community support
Professional	Custom	Annual seat licenses; SSO, access controls
Enterprise	Custom	Compliance, HA, 24x7 support
Enterprise Advanced	Custom	Air-gapped, Zero Trust, classified controls

Source: mattermost.com · checked on Oct 20, 2026

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Price changes for Mattermost

Verified changes to Mattermost's prices and plans, newest first.

All price changes

Free planAugust 23, 2025 · Announced

Mattermost v11 cuts Team Edition from 1,000 to 250 users and adds a free Entry edition

On August 23, 2025 Mattermost announced that v11 (released October 2025) lowers the Team Edition user limit from 1,000 to 250 and removes GitLab SSO. Paid customers are unaffected. A free Entry edition for small teams has usage caps such as 10,000 messages and 1,000 board cards, some applying in a later release.

Sources:Mattermost forum announcement, v11 changes in free offerings Mattermost docs, Editions and offerings Mattermost v11 changelog

How Mattermost compares in Team communication

Rank by votes: #1 / 36
Starting price: $0
Free alternatives: 5

Mattermost ranks #1 of 36 team communication tools by community votes and is not directly comparable on price.

Common use cases

1Defense or government chat
2Incident response
3Regulated enterprise
4DevOps collaboration

Best for

Organizations needing self-hosted secure chat.

Not ideal for

Teams wanting Slack's ecosystem.

Integrations

GitLab
Jira
GitHub
Jenkins
Zoom
LDAP
SAML

Our take

Mattermost is the secure, self-hosted Slack alternative.

FAQ

What is Mattermost?: Mattermost is a Team communication tool: Self-hosted secure collaboration.
How much does Mattermost cost?: Mattermost is Open source; there is no mandatory paid plan.
What are the best alternatives to Mattermost?: Community-listed alternatives to Mattermost include Rocket.Chat, PrivOS, Nextcloud, Netgsm.
What does Mattermost integrate with?: Mattermost integrates with GitLab, Jira, GitHub, Jenkins, Zoom, LDAP and more.
Which platforms does Mattermost support?: Mattermost is available on web, macos, windows, linux, ios, android.
Who is Mattermost for?: Organizations needing self-hosted secure chat.

Alternatives to Mattermost

See all 10

Rocket.Chat
▲ 0
Open-source team chat and omnichannel
Open sourceEnterprise
checked Oct 20
PrivOS
▲ 0
Self-hostable team chat, lists, docs and sandboxed AI agents
Freemium · $20Small businesses
checked Oct 25
Nextcloud
▲ 0
Self-hosted content collaboration platform
Open sourceEnterprise
checked Oct 20
Netgsm
▲ 0
Bulk SMS, cloud telephony and messaging for Turkish businesses
PaidSmall businesses
checked Oct 20
agentmash
▲ 0
Shared room that warns coding agents before they edit the same file
Freemium · $20Developers
checked Nov 2
BAND
▲ 0
Shared chat rooms where AI agents and people coordinate work
Freemium · $18Developers
checked Oct 22

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