Free, open-source diagrams you and your agent edit together
A free, open-source diagram canvas: MIT, local-first, no account, in your browser. One canvas, five ways in. Draw it. Write it as code, or paste Mermaid, D2 or Structurizr. Ask any of 10 AI providers, or a local model. Hand it to your coding agent: Claude Code edits the canvas you have open, live, over MCP. Or pull it from a GitHub repo, every arrow citing its file and line. The CLI checks drift in CI, so diagrams keep up with your code.
Hi everyone, I'm Varun. OpenFlowKit was here about 8 months ago as v1. Version 2 is a rebuild from scratch:
- One canvas, five ways in: draw it, write it as code, ask any AI model (or a local one), hand it to your coding agent, or pull it from a GitHub repo
- Your coding agent edits the canvas you have open, live, over MCP (npx -y openflowkit mcp). Every change is one undo step
- Text and canvas are the same diagram: write it as code, or paste Mermaid, D2 or Structurizr
- The repo map cites the file and line behind every arrow, so you can check it instead of trusting it
Why I built it: every team I've worked on had an architecture diagram that was right once. The code kept moving, the diagram didn't, and new people learned the system from a picture nobody trusted. So everything here is built to keep the diagram current: you, your AI and your agent all edit the same one.
Try it with no account: app.openflowkit.com
Honest limits: the map reads code statically (imports and config files, not running traffic), reads public GitHub repos in the browser (run the CLI on a checkout for private ones), and is weaker on .NET and Elixir projects without containers. There's no real-time collaboration yet.
It's free and MIT licensed, and I built it on my own.
A real question: what's the diagram you keep redrawing? Try it there and tell me what got in the way.
About OpenFlowKit 2 on Product Hunt
“Free, open-source diagrams you and your agent edit together”
OpenFlowKit 2 launched on Product Hunt on October 13th, 2026 and earned 86 upvotes and 3 comments, placing #25 on the daily leaderboard. A free, open-source diagram canvas: MIT, local-first, no account, in your browser. One canvas, five ways in. Draw it. Write it as code, or paste Mermaid, D2 or Structurizr. Ask any of 10 AI providers, or a local model. Hand it to your coding agent: Claude Code edits the canvas you have open, live, over MCP. Or pull it from a GitHub repo, every arrow citing its file and line. The CLI checks drift in CI, so diagrams keep up with your code.
On the analytics side, OpenFlowKit 2 competes within Design Tools, Open Source, Developer Tools and GitHub — topics that collectively have 895k followers on Product Hunt. The dashboard above tracks how OpenFlowKit 2 performed against the three products that launched closest to it on the same day.
Who hunted OpenFlowKit 2?
OpenFlowKit 2 was hunted by Varun. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of OpenFlowKit 2 including community comment highlights and product details, visit the product overview.
Varun