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.
The one I keep redrawing is which service is allowed to touch which table, and static imports is exactly where that one falls over. An import graph tells you what can call what, not what does, so the edges I care about are the ones that only exist at runtime, a queue, a webhook, a cron job hitting an endpoint nobody imports. Drift check will happily tell me the diagram is current while the edge that would actually hurt me was never on it. Worth saying you listed that limit yourself, most launches bury it.
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.
OpenFlowKit 2 was featured in Design Tools (263.4k followers), Open Source (68.9k followers), Developer Tools (521.3k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 183.2k products, making this a competitive space to launch in.
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.
Want to see how OpenFlowKit 2 stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Varun