Communication

Mattermost

Mattermost is a sovereign collaboration and AI automation platform designed for secure, mission-critical team communication and workflow

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Overview

Mattermost delivers secure messaging, file sharing, workflow automation, audio/screenshare, and project management with full data control for national security and critical infrastructure teams. It supports on-premises, private cloud, and hybrid deployments with advanced security and compliance features.

Updated Nov 11, 2026

13 things

What Mattermost has

Apps

iOS (store page, opens in a new tab)
Android (store page, opens in a new tab)
Windows
macOS
Linux

For developers

Programmatic access to the product's data and features for developers. One of 21 Communication tools with an API.
Run the software on your own servers instead of the vendor's cloud. One of 6 Communication tools you can self-host.

For teams

Lets invited clients, partners, or freelancers access selected project work.

Hosting and storage

Run software in an environment isolated from external networks.
A dedicated cloud environment for running software and keeping its data separate. One of 4 Communication tools with private cloud.

Pricing

A product demonstration available to prospective customers who want to evaluate the tool. One of 13 Communication tools with public demo.

Extras

Pre-built starting points you can edit to fit your own needs. One of 7 Communication tools with templates.
A place where users find add-ons, plugins or templates others made for the product. One of 6 Communication tools with marketplace.

7 features

Key Features

Incident channels
Each case or incident gets its own channel with files, calls, and a response playbook, on desktop and mobile.
Message archiving
Every message is archived, with legal hold and export to Proofpoint or Global Relay.
Message acknowledgments
Full searchable history across channels, threads, and direct messages, with per-channel permissions and retention. Priority messages track who has acknowledged them. Available on web, desktop, mobile, and embedded inside Microsoft Teams.
Cross-domain sharing
Share intelligence and operational data across classification boundaries without physically moving data, keeping separate logins on each network, or relying on uncontrolled voice coordination.
Classification labels
Control data spillage with access set by clearance and every channel marked with its classification.
Playbooks
Monitoring alerts open incident channels, playbooks guide each response, and crews send photos and status from the field.
High availability
Jira, GitHub, and ServiceNow stay in sync, and Mattermost stays up when primary systems go down.

Pros and cons

Pros

Supports deployment on-premises, private cloud, sovereign cloud, and air-gapped environments for maximum data control.
Advanced security and compliance features tailored for national security and critical infrastructure use cases.
Integration with Microsoft Teams and Microsoft 365 to extend existing enterprise investments.
AI-powered workflow automation and sovereign AI agents to accelerate mission-critical operations.
Flexible deployment options including hybrid and multi-region setups.

Cons

Pricing details require contacting sales for enterprise plans, limiting upfront transparency.
The platform is complex and may require specialized knowledge for setup and management.
Free version has limited use and features compared to enterprise offerings.
Focused primarily on mission-critical and government use cases, which may be overkill for general business teams.
Some advanced features like horizontal scaling for group calls are available only in higher-tier plans.

As of October 2026

Pricing

Professional
Custom
on request
Enterprise
Custom
on request
Enterprise Advanced
Custom
on request

You?

Be the first to rate Mattermost

Your review helps others make better decisions. No account needed. Takes about 10 seconds.

Featured Video

See Mattermost at work before you try it.

Watch on YouTube

0 questions

Frequently Asked Questions

No reviews yet

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Community reviews

Sort:Write a review

No written reviews yet. Be the first to share your experience.

Tried this tool? Share your experience.

Write a review

13 things

What Mattermost has

Apps

iOS (store page, opens in a new tab)
Android (store page, opens in a new tab)
Windows
macOS
Linux

For developers

Programmatic access to the product's data and features for developers. One of 21 Communication tools with an API.
Run the software on your own servers instead of the vendor's cloud. One of 6 Communication tools you can self-host.

For teams

Lets invited clients, partners, or freelancers access selected project work.

Hosting and storage

Run software in an environment isolated from external networks.
A dedicated cloud environment for running software and keeping its data separate. One of 4 Communication tools with private cloud.

Pricing

A product demonstration available to prospective customers who want to evaluate the tool. One of 13 Communication tools with public demo.

Extras

Pre-built starting points you can edit to fit your own needs. One of 7 Communication tools with templates.
A place where users find add-ons, plugins or templates others made for the product. One of 6 Communication tools with marketplace.

7 features

Key Features

Incident channels
Each case or incident gets its own channel with files, calls, and a response playbook, on desktop and mobile.
Message archiving
Every message is archived, with legal hold and export to Proofpoint or Global Relay.
Message acknowledgments
Full searchable history across channels, threads, and direct messages, with per-channel permissions and retention. Priority messages track who has acknowledged them. Available on web, desktop, mobile, and embedded inside Microsoft Teams.
Cross-domain sharing
Share intelligence and operational data across classification boundaries without physically moving data, keeping separate logins on each network, or relying on uncontrolled voice coordination.
Classification labels
Control data spillage with access set by clearance and every channel marked with its classification.
Playbooks
Monitoring alerts open incident channels, playbooks guide each response, and crews send photos and status from the field.
High availability
Jira, GitHub, and ServiceNow stay in sync, and Mattermost stays up when primary systems go down.

Pros and cons

Pros

Supports deployment on-premises, private cloud, sovereign cloud, and air-gapped environments for maximum data control.
Advanced security and compliance features tailored for national security and critical infrastructure use cases.
Integration with Microsoft Teams and Microsoft 365 to extend existing enterprise investments.
AI-powered workflow automation and sovereign AI agents to accelerate mission-critical operations.
Flexible deployment options including hybrid and multi-region setups.

Cons

Pricing details require contacting sales for enterprise plans, limiting upfront transparency.
The platform is complex and may require specialized knowledge for setup and management.
Free version has limited use and features compared to enterprise offerings.
Focused primarily on mission-critical and government use cases, which may be overkill for general business teams.
Some advanced features like horizontal scaling for group calls are available only in higher-tier plans.

As of October 2026

Pricing

Professional
Custom
on request
Enterprise
Custom
on request
Enterprise Advanced
Custom
on request

You?

Be the first to rate Mattermost

Your review helps others make better decisions. No account needed. Takes about 10 seconds.

Featured Video

See Mattermost at work before you try it.

Watch on YouTube

0 questions

Mattermost

Overview

What Mattermost has

Apps

For developers

For teams

Hosting and storage

Pricing

Extras

Key Features

Incident channels

Message archiving

Message acknowledgments

Cross-domain sharing

Classification labels

Playbooks

High availability

Pros and cons

Pros

Cons

Pricing

Mattermost pricing plans

Professional

Enterprise

Enterprise Advanced

Be the first to rate Mattermost

Featured Video

Frequently Asked Questions

What Mattermost has

Apps

For developers

For teams

Hosting and storage

Pricing

Extras

Key Features

Incident channels

Message archiving

Message acknowledgments

Cross-domain sharing

Classification labels

Playbooks

High availability

Pros and cons

Pros

Cons

Pricing

Mattermost pricing plans

Professional

Enterprise

Enterprise Advanced

Be the first to rate Mattermost

Featured Video

Frequently Asked Questions

More in Communication

More in Communication