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Mattermost

8.2

Very Good

Free Plan • From $5/user/month for the paid plan

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description Mattermost Overview

Mattermost is the premier open-source alternative to Slack, designed specifically for teams that prioritize security, privacy, and control. It offers a familiar interface that makes migrating from Slack effortless. Because it is self-hosted, your data stays entirely within your own infrastructure, making it a favorite for organizations in regulated industries like finance, healthcare, and government. It supports extensive integrations with developer tools and provides a high degree of customization through its API.

For teams that want the power of Slack without the cloud-based privacy concerns, Mattermost is the definitive choice.

recommend Best for: Ideal for large teams that require a customizable and secure chat solution with real-time messaging.

info Mattermost Specifications

Api	REST API available
Platform	Web and Desktop
Languages	JavaScript, Go
Integration	Slack, Microsoft Teams, Jira, GitHub

balance Mattermost Pros & Cons

thumb_up Pros

check Open-source and customizable
check Self-hosted with security
check Scalable for large teams
check Real-time messaging and collaboration

thumb_down Cons

close Limited mobile app functionality
close Customization requires technical expertise
close Lacks some advanced features of paid competitors
close User interface can be complex for new users

help Mattermost FAQ

Is Mattermost open-source?

Yes, Mattermost is an open-source platform that allows for customization and integration with other tools.

Can I use Mattermost on my mobile device?

Mattermost has a mobile app, but it may lack some advanced features available in the desktop version.

Is there a free plan available?

Yes, Mattermost offers a free plan with limited features for small teams.

What is Mattermost?

Mattermost is the premier open-source alternative to Slack, designed specifically for teams that prioritize security, privacy, and control. It offers a familiar interface that makes migrating from Slack effortless. Because it is self-hosted, your data stays entirely within your own infrastructure, making it a favorite for organizations in regulated industries like finance, healthcare, and government. It supports extensive integrations with developer tools and provides a high degree of customization through its API. For teams that want the power of Slack without the cloud-based privacy concerns, Mattermost is the definitive choice.

How good is Mattermost?

Mattermost scores 8.2/10 (Very Good) on Lunoo, making it a well-rated option in the Video Conferencing Large Team category. Mattermost scores 7.8/10 due to its open-source nature, self-hosted security, and scalability for large teams. However, it falls short in terms of mob...

How much does Mattermost cost?

Free Plan • From $5/user/month for the paid plan. Visit the official website for the most up-to-date pricing.

What are the best alternatives to Mattermost?

See our alternatives page for Mattermost for a ranked list with scores. Top alternatives include: Discourse, Nextcloud Talk, Rocket.Chat.

What is Mattermost best for?

Ideal for large teams that require a customizable and secure chat solution with real-time messaging.

How does Mattermost compare to Discourse?

See our detailed comparison of Mattermost vs Discourse with scores, features, and an AI-powered verdict.

Is Mattermost worth it in 2026?

With a score of 8.2/10, Mattermost is highly rated in Video Conferencing Large Team. See all Video Conferencing Large Team ranked.

What are the key specifications of Mattermost?

API: REST API available
Platform: Web and Desktop
Languages: JavaScript, Go
Integration: Slack, Microsoft Teams, Jira, GitHub

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8.2

Very Good

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Why this score

Mattermost scores 8.2/10 due to its open-source nature, self-hosted security, and scalability for large teams. However, it falls short in terms of mobile app functionality and advanced features compared to some competitors.

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