OnUML vs Splotch
| OnUML | Splotch | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | Yes | Yes |
| Mermaid support | Yes | — |
| Platform | web | web+desktop |
| Export formats | PNG, SVG | PNG, PDF, HTML embed |
| Real-time collaboration | — | Yes |
| Diagram import | — | Yes |
Both are listed in Best AI Diagram Generators. On Samsung Mobile US Press, Splotch scores higher on our published basis.