Open source flowchart projects
Every project in the registry tagged flowchart, ranked by real GitHub adoption.
Text-based diagramming that renders in code and docs
开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc.
FlowGram is an extensible workflow development framework with built-in canvas, form, variable, and materials that helps developers build AI workflow platforms f
Customizable no-code component for building flow-based programming applications or workflow automation. 0 external dependencies. Check out https://nocode-js.com
Related tags
Frequently asked questions
How many open source flowchart projects are there?
This registry tracks 4 projects tagged flowchart, with 114,940 GitHub stars between them. The most-adopted is Mermaid at 90,293 stars.
Are these flowchart projects free to use?
Yes — 4 of the 4 carry an explicit open-source licence across 1 distinct licence, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which flowchart project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these flowchart projects still maintained?
4 of the 4 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.