OpenKnowledge: Open-Source, AI-Native Alternative to Obsidian/Notion
OpenKnowledge is an open-source, AI-native markdown editor and knowledge base that serves as an alternative to Obsidian or Notion. It offers a beautiful rich text editor with markdown under the hood, designed for both humans and AI agents. Features include collaborative editing, git-backed sync, agent-native skills, MCP integration for Claude, Cursor, and Codex, and a local-first, privacy-focused approach. The launch of v2.0 saw significant traction with 1.4k signups in 24 hours and hitting #1 on Product Hunt and front page of Hacker News.
Open source
Beautiful, AI-native markdown editor.
A rich text editor for you and your agents. Private, open source, and free.
Download for macOSor CLI
Use with
Claude
Help me write up our launch week
Drafting your launch recap in Open Knowledge.
open-knowledge · write
Done
retros/launch-week.mdCreate recap + add daily activity chart
Updated retros/launch-week.md — added a "Highlights" section with three wins and the daily activity chart.
Ask anything
https://openknowledge.ai/retros/launch-week
Open Knowledge
VisualMarkdown
titleLaunch week recap
tags#launch#retro#v2
Launch week recap
v2.0 went public on June 3 — the end of a quiet QA window and the start of launch week.
47 PRs merged across the cycle. Activity stayed close to zero through QA, then spiked on launch day as the announcement went live.
Highlights
Shipped v2.0 to public on Jun 3
1.4k new signups in the first 24 hours
Hit #1 on Product Hunt and front of HN
PRs merged per day · last 30 days
main76 words · 385 chars · ~97 tokens76 words · 385 chars · ~97 tokens
Cursor
Help me write up our launch week
Drafting your launch recap in Open Knowledge.
open-knowledge · write
Done
retros/launch-week.mdCreate recap + add daily activity chart
Updated retros/launch-week.md — added a "Highlights" section with three wins and the daily activity chart.
Ask anything
https://openknowledge.ai/retros/launch-week
Open Knowledge
VisualMarkdown
titleLaunch week recap
tags#launch#retro#v2
Launch week recap
v2.0 went public on June 3 — the end of a quiet QA window and the start of launch week.
47 PRs merged across the cycle. Activity stayed close to zero through QA, then spiked on launch day as the announcement went live.
Highlights
Shipped v2.0 to public on Jun 3
1.4k new signups in the first 24 hours
Hit #1 on Product Hunt and front of HN
PRs merged per day · last 30 days
main76 words · 385 chars · ~97 tokens76 words · 385 chars · ~97 tokens
Codex
Help me write up our launch week
Drafting your launch recap in Open Knowledge.
open-knowledge · write
Done
retros/launch-week.mdCreate recap + add daily activity chart
Updated retros/launch-week.md — added a "Highlights" section with three wins and the daily activity chart.
Ask anything
https://openknowledge.ai/retros/launch-week
Open Knowledge
VisualMarkdown
titleLaunch week recap
tags#launch#retro#v2
Launch week recap
v2.0 went public on June 3 — the end of a quiet QA window and the start of launch week.
47 PRs merged across the cycle. Activity stayed close to zero through QA, then spiked on launch day as the announcement went live.
Highlights
Shipped v2.0 to public on Jun 3
1.4k new signups in the first 24 hours
Hit #1 on Product Hunt and front of HN
PRs merged per day · last 30 days
main76 words · 385 chars · ~97 tokens76 words · 385 chars · ~97 tokens
The editor
A canvas for your knowledge.
A Notion or Google-docs editor experience that's just markdown under the hood.
Components
Callout
Accordion
Tabs
Mermaid
Media
Image
Video
Tip
Pin key context next to the section that needs it.
Click to expand
Setup
Run
Ship
Install deps and run init.
Highlight a tip, warning, or aside inline.
Collapsible section with a clickable summary.
Switch between content panes inline.
Render flowcharts and diagrams from text.
Drop in images with captions and resize controls.
Embed videos with playback controls inline.
Rich elements
Tables, images, code, diagrams, and more.
INKPInkeep, Inc.
+3.01%
$147.85$012345678901234567890123456789.01234567890123456789
Embeddable HTML
Drop-in apps, previews, and visualizations.
Templates
Ready-made and customizable templates.
Claude
I'll capture this as a decision doc.
Usedopen-knowledge:write
Calling200 ok
docName:decisions/api-strategy
position:replace
summary:Capture API choice decision
Done — edit landed:
1.decisions/api-strategy.md—Capture API choice decision.
Timeline
claude-code18 min ago
• Add migration runbook section
runbooks/db-migrations
claude-code1 hr ago
• Sync standup notes
team/standup-notes
AI native
Made for agents.
Built-in tools for agents to co-author and understand your knowledge base.
Agent-native skills
Your agents know how to navigate, edit and grow your knowledge base out of the box.
Built in MCP
Plug your docs straight into Claude, Cursor and Codex. No copy-paste, no export.
Per-change undo and version history
Every change is yours to keep, tweak or undo. Nothing is final until you say so.
Try a template
Use cases
Put it to work.
Agent brain
A shared knowledge base your agents read from and write to — the persistent memory behind every session.
auth.ts
SPEC
Auth service
S
You and your agents
Engineering specs
Specs, RFCs and runbooks living next to the code, edited by humans and coding agents in the same loop.
Oncall guide
Incident postmortem
DOCS
Deploy runbook
Updated 2 hours ago
M
J
K
Kept current by 12 people
Knowledge base
A living wiki for your team — docs, notes, and decisions in plain markdown, kept current by everyone who works on them.
roadmap.md
Share
A
Q3 Roadmap
We’re bringing the whole team into one shared workspaceClaude, where people and agents edit the same files instead of losing context in a thread.
This quarter
Ship the collaborative editorAlan for docs and spaces
One click to share a doc, or a whole workspace
Git-backed sync so history and ownership stay yoursCodex
Sharing
Collaborate with your team.
One click to share a doc or a whole space. People and agents collaborate on the same files; everything syncs through git, so history and ownership stay yours.
1-click share
git-backed sync
Collaborate with AI
Privacy first
Own your knowledge.
Local-first, open source, plain files you own. Platform-agnostic by design.
Local-first
Runs on your machine; private by design.
Open source
Auditable, self-hostable, & community-built.
Platform-agnostic
Use with any agent and any tool.
Get started
Start building knowledge.
Download for macOSor CLI