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
Wireflow - user flow chart real-time collaborative tool
Customizable no-code component for building flow-based programming applications or workflow automation. 0 external dependencies. Check out https://nocode-js.com
100% Free, Open-source local-first AI diagramming for architecture diagrams and flowcharts with animated exports.
Angular-native node editor library for production workflow builders, AI pipelines, and interactive diagram editors. MIT licensed.
Related tags
Frequently asked questions
How many open source flowchart projects are there?
This registry tracks 7 projects tagged flowchart, with 121,665 GitHub stars between them. The most-adopted is Mermaid at 90,981 stars.
Are these flowchart projects free to use?
Yes — 7 of the 7 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?
7 of the 7 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.