How to Build Your Own Mattermost
Replace Mattermost with a custom build. Collaboration Platform for Mission Critical Work
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 42 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Real-time messaging and live updates
Key Features to Replicate
Top features across 8 categories. See all 42 features
AI(9 features)
Ensure AI-powered assistance operates within strict security boundaries by user and channel
Track LLM usage at user level to optimize performance and costs
Use semantic understanding and Retrieval-Augmented Generation for highly relevant, context-aware answers across workspace
Integrate privately hosted language models into Mattermost with support for multiple AI/LLM service backends
Leverage AI to provide concise summaries and generate relevant content based on discussion context
+4 more in this category
Communication(8 features)
Call another user to start a 1-1 audio discussion with optional screen sharing across web, desktop, and mobile
Capture every spoken word in real-time and automatically generate AI-powered summaries for mission-critical communication
Channel-based messaging including 1-1, group messaging, public and private channels with file sharing across web, PC, Mac, iOS, and Android devices
Streamline real-time collaboration with group audio calling and screen share up to approximately 50 concurrent users per self-hosted server
Allow end users to specify message priority as Standard, Important, or Urgent to elevate focus
+3 more in this category
Integration(4 features)
Seamlessly synchronize user attributes and group memberships from Active Directory or LDAP directories
Operational extensibility with pre-packaged, source-available connectors, automations, and templates for rapid systems integration
Connect users across Microsoft Teams and Mattermost for federated communications
Seamlessly integrate with modern toolchains and legacy systems with pre-packaged connectors for common developer tools
Organization(4 features)
Group related channels into custom sections to improve navigation and prioritize conversations in high-volume workspaces
Create custom user groups to mention and notify up to 256 users working together on projects or functions
Tag key topics, themes, or initiatives directly within conversations to enhance discoverability and organization
Organize discussions within channels using threaded discussions and thread inbox to follow-up on conversations
Security(3 features)
Comprehensive tracking of all system activities for detailed auditing and troubleshooting
Add extra layer of security beyond username and password to prevent unauthorized access
Log into multiple applications with single credentials, supporting SAML, OpenID Connect, and OAuth 2.0
Access Control(2 features)
Configure channels as read-only, restrict mentions and emoji reactions, and lock down channels for admin-only modification
Bring external users into Mattermost instance as guests with limited permissions for restricted access
Notifications(2 features)
Ensure urgent messages remain visible until acknowledged or replied to with configurable notification frequency
Notify users across teams of system maintenance, service changes, and announcements using system-wide banners
Productivity(2 features)
Increase efficiency of technical teams with compact display views of discussions and tooling notifications
Open multiple chat windows simultaneously to enhance multitasking and keep priority conversations visible
Cost Calculator
Pricing data not available for Mattermost. Check their website for current pricing.