Oppia
An open-source, self-hosted collaboration platform that provides secure online communication, file sharing, and project management for enterprise teams
Mattermost is an open-source, self-hosted collaboration platform designed as a secure, high-trust alternative to Slack and Microsoft Teams. It is specifically built for technical and operational teams—such as DevSecOps, cybersecurity, and government agencies who require full control over their data and infrastructure.Core Capabilities
Channels: Secure, threaded messaging for real-time and asynchronous team communication.
Playbooks: Structured, automated workflows and checklists for repeatable processes like incident response or release cycles.
Boards: Kanban style project management to track tasks and stay organized within the same interface.
Calls: Self hosted audio calling and screen sharing, which can operate even in air-gapped or disconnected environments.
AI Integration: A sovereign AI framework (Intelligent Mission Environment) that allows teams to use AI agents and LLMs while maintaining data privacy