OnUML vs sysdraw
| OnUML | sysdraw | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | $6/mo |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | Yes | Yes |
| Mermaid support | Yes | Yes |
| Platform | web | web |
| Export formats | PNG, SVG | PNG, SVG, PDF, JSON |
| AI diagram limit | — | 300 /mo |
| Real-time collaboration | — | Yes |
| Diagram import | — | Yes |
Both are listed in Best AI Diagram Generators. On Specifiction, sysdraw scores higher on our published basis.