HackMD

A real-time collaborative Markdown knowledge base that enables teams to write, edit, and share documents together, solving the problem of disconnected collaboration and documentation. It targets developers, IT professionals, and teams of all sizes, from startups to enterprises, as well as communities and open-source projects. It is positioned as a shared context layer that integrates with AI agents via API, allowing agents to pull and push Markdown content, and is available as a SaaS with a free tier and enterprise options.

Key features

• Real-time editing with multiple cursors
• Comments and mentions
• Version history
• Templates
• GitHub integration
• Image upload via drag-and-drop or paste
• Save to Dropbox, Google Drive, Gist
• Import from Dropbox, Google Drive, Gist
• Share notes with customizable URLs
• API for agent integration
• Markdown content via REST API or CLI
• Slide mode
• Public notes and shared workspaces