Mattermost.com
Secure, self-hosted collaboration platform for mission-critical teams — deploy on-prem, air-gapped, or private cloud
| What is it | Secure, self-hosted collaboration platform for mission-critical teams — deploy on-prem, air-gapped, or private cloud |
|---|---|
| Pricing | Contact for Pricing |
| Free tier | No |
| Platform | Web Application |
| API | Yes |
| Works with | n8n |
| Best for | secure incident response across classified networks, real-time collaboration in air-gapped or sovereign environments |
| Domain registered | 2012 |
Data updated Aug. 1, 2026
What does Mattermost.com do?
Mattermost.com is a collaboration platform built for organizations that can't trust their data to public cloud services. It gives you messaging, audio calls, and workflow automation — all deployed on your own infrastructure, whether that's on-premises, in a private cloud, or fully air-gapped. The US Air Force, NASA, and Samsung all use it for mission-critical work where control and security come first.
At its simplest, Mattermost works like other team chat apps. You create channels for different teams or projects, send messages, share files, and make voice calls. But the real differentiator is how it handles security and scale. You can deploy it in environments that have no internet connection, set granular access controls, and meet strict compliance requirements. Playbooks turn recurring tasks like incident response into step-by-step automated workflows. Integrations link with tools like GitLab, Jira, and Microsoft Teams, and its open API lets you build custom connectors. The platform also includes AI agents — you can ask them to summarize conversations, answer questions from your knowledge base, or automate routine actions.
This tool is best suited for government agencies, defense contractors, critical infrastructure operators, and large enterprises that need data sovereignty. It's also a solid choice for any team running security operations (SOC), managing incident response, or working in regulated industries like energy and finance. If your organization can't use Slack or Teams because of data residency or security policies, Mattermost gives you the same core collaboration features with full control over where and how your data lives.
Key features
What makes it stand outWho is Mattermost.com for?
Who benefits most from this toolPricing
Professional
- Messaging, File Sharing, and Link and File Previews across Device Platforms
- 1:1 Audio Calls and Screen Sharing
- Threaded Discussions
- Core Search up to 3 Million Posts
- Custom Branding, Themes, and Emojis
- Hashtags
- Channel Categorization
- Available in 20 Languages
- Multi-Window Desktop
- Compact View
- Markdown Compatibility
- Message Priority
- Persistent Notifications
- Group Calling and Screen Share
- Guest Accounts
- Custom User Groups
- System-Wide Notifications
- Multifactor Authentication
- Single Sign-On
- AD/LDAP User Sync
- Advanced Access Controls
- Interactive AI Bot Support
- Bring-Your-Own & Multi-LLM Integration
- Integrations Platform
- Operational and DevOps Integrations
- Community Support
- Professional Support
Trust & presence
Gallery
Click any image to enlargeAlternatives in Chat & Assistants
Chatsistant
Verified
Chat & Assistants
Build custom AI chat assistants using your own data with a multi-agent RAG framework.
Chatterdocs
Verified
Chat & Assistants
Create custom AI chatbots for customer support, lead capture, and appointment booking using your own data.
SiteGPT
Verified
Chat & Assistants
Create custom AI chatbots trained on your website content to provide 24/7 customer support and answer visitor questions instantly.
ChatterMate
Verified
Chat & Assistants
Open-source AI chatbot for customer support — provides instant answers, product recommendations, and automated workflows with human handoff.
BotSpace
Verified
Chat & Assistants
AI chatbot platform for building and deploying custom conversational agents
AICamp
Verified
Chat & Assistants
AI platform offering chat, assistants, and workflows to help teams integrate and manage multiple AI models.
Activechat
Verified
Chat & Assistants
An on-premise platform that automates customer service with AI chatbots, live chat hints, and multi-channel support.
ChatFly
Verified
Chat & Assistants
No-code platform to create custom AI chatbots trained on your data and deploy them across websites, apps, and messaging platforms.
Similar tools
Dust
Verified
Enterprise assistants
Platform to build, deploy, and manage custom AI agents connected to your company's data and workflows.
Moxt
Verified
Virtual employees
AI-native workspace where personalized AI teammates collaborate with your team in Slack and handle tasks autonomously.
NeuralTrust
Verified
Developer Tools
AI gateway that connects agents to models and tools with centralized security, observability, and governance.
Works with n8n
View all →
OpenAI
Verified
Models
AI platform offering ChatGPT for conversation, an API for developers, and business solutions — all powered by GPT models.
DeepL Translator
Verified
Translation
AI-powered translation tool delivering superior accuracy for text, documents, and real-time communication across 30+ languages.
Anthropic
Verified
Models
AI research and product company building safe, capable assistants like Claude
ClickUp
AI Workspace
AI-powered project management hub — manage tasks, documents, and collaboration with built-in AI assistants.
VEED.IO
Verified
Video Editor
Online video editor with AI tools for subtitles, dubbing, avatars, and screen recording — all in your browser.
Claude AI
Verified
Chat & Assistants
AI assistant that helps with writing, coding, analysis, and research — chat, generate content, or connect it to your tools
JetBrains
Verified
Developer Tools
A suite of integrated development environments (IDEs) with built-in AI coding assistance for multiple programming languages.
Trello
Verified
Productivity Tools
AI-powered project management tool to organize tasks, track progress, and collaborate with teams using boards, lists, and cards.