diagrams.net (draw.io)
Design & WhiteboardsA diagramming tool for flowcharts, network and UML diagrams that runs in the browser or as a desktop app and lets you choose where files are stored.
Open-source alternative to:

What the free edition leaves out
Scroll sideways to view all columns →We have not been able to confirm enough from official sources to give a verdict. “Not confirmed” means the official pages we read did not say, so we do not guess.
| Feature | Free edition | Details | Source |
|---|---|---|---|
| SSO / SAML | Not confirmed | The homepage says the code is Apache 2.0 licensed with no Enterprise tier for SSO, but does not say that SSO or SAML is built in. | Source ↗ |
| Role-based access control | Not confirmed | No official page states whether the free edition includes this. | – |
| Audit logs | Not confirmed | No official page states whether the free edition includes this. | – |
| Multi-user / teams | Not confirmed | No official page states whether the free edition includes this. | – |
| Backups and restore | Not confirmed | No official page states whether the free edition includes this. | – |
| API access | Not confirmed | No official page states whether the free edition includes this. | – |
| Support SLA | Not confirmed | The homepage links to a support page, GitHub Discussions and Stack Overflow. No paid support or SLA is described. | Source ↗ |
Best for
People who want free diagramming where they pick the storage location, including offline on the desktop.
Why choose it over Lucidchart
The source code is Apache 2.0 licensed and the project says diagrams are yours, with no copyright claim on what you create. You choose where files are stored and can use the online editor, the desktop app or a self-hosted copy. The homepage states there is no Enterprise tier for SSO.
Where it falls short
Files live in the storage you connect (device or a cloud drive), not in a project workspace run by the tool. The README describes the GitHub Pages option as the editor without integrations. Icon sets and stencil libraries have separate terms for Atlassian products. No paid support or SLA is described.
Open-source alternative to
- Lucidchart — diagrams.net draws flowcharts and technical diagrams in the browser or on the desktop, so it can replace Lucidchart for diagramming. This is a replacement use, not an official claim by the project.
Category
Design & WhiteboardsTopics
Tech stack
Languages as reported by GitHub for the repository.