HackMD is unclaimed —

HackMD

Where teams and agents build together·hackmd.io

HackMD is a real-time collaborative Markdown editor and workspace for creating, sharing, and editing documents together. It supports version history, comments, templates, GitHub integration, public note publishing, embeds, and slide/book presentation modes. It also exposes a REST API, CLI, and an MCP server so AI agents can read and write notes alongside human collaborators.

What it's for

real-time collaborative note editingteam documentationpublishing public notes with permalinkssyncing notes to GitHubcreating slide presentations from notesbuilding a community knowledge basefeeding AI agents document context via API/CLI/MCPembedding notes in other pages

Features 20

Book mode for organizing notes
Comments and mentions
Full-text search
GitHub integration and note-to-GitHub pushes
GitLab integration (Enterprise)
Image upload with drag-and-drop and paste
Import/export via Dropbox, Google Drive, and Gist
Math rendering via MathJax and diagram support (Mermaid, PlantUML, Graphviz, sequence diagrams, flowcharts)
Multiple cursors / live co-editing
Note embedding via iframe
Note templates
PDF export
Public note publishing with custom permalinks
Real-time collaborative Markdown editing
REST API, CLI, and MCP server for AI agent access
Role-based access control and SSO login (Enterprise)
Shared workspaces / teams
Slide mode presentations
Table of contents auto-generation
Version history

At a glance

free tierself-hostableAPI

TypeWeb app

DeploymentHybrid

PlatformsWeb

LanguagesEnglish, Chinese, Japanese

Forteams, communities, developers, researchers, classrooms, open-source projects, hackathon participants

CompanyHackMD

Integrations

GitHubGitLabDropboxGoogle DriveGistChromeFirefoxClaude CodeCursorWindsurfClaude DesktopGitHub ActionsOpenAISpotify

Complianceself-reported

SOC 2

Resources

Pricing

Prime is priced per seat with a team-size selector; the page shows $5/seat/mo under annual billing with an example total of $15/month, and separately lists the same $5/seat/mo figure in the plan comparison table without stating a standalone monthly rate. Enterprise pricing is quote-based via a demo request. A FAQ question references possible special pricing for non-profits, but no details are given on the page.

FreeFree

Unlimited notes, 3 invitees, 3 custom templates, Suggest edit, GitHub integration, 20 GitHub pushes per month, Customize permalink to your note, Upload up to 1MB per image

Up to 3 teammates, 3 invitees, 20 GitHub pushes per month, up to 1MB per image, 400 API calls/month

Prime$5/user/mo · billed annually

Price shown reflects annual billing (Save 37.5%); monthly-only billing price not stated on the page.

Unlimited invites, unlimited versions, unlimited GitHub pushes, 20,000 API calls per month, images up to 20MB

EnterpriseQuote

Quote-based; request a demo for pricing. Self-hosting and custom browser extension server instance mentioned for Enterprise.

Unlimited API calls, unlimited GitHub pushes, custom seat purchasing

Save 37.5% on Prime when billed annually.