D2 vs UMLet
| D2 | UMLet | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | Web, Windows, macOS, Linux |
| Free plan | Yes | Yes |
| Diagram types | software architecture diagrams; UML class diagrams; sequence diagrams | class, use case, sequence, state, deployment, activity |
| Offline editing | Yes | — |
| Import/export formats | D2 (.d2); SVG; PNG; PDF; PPTX; GIF; ASCII | UXF; BMP, EPS, GIF, JPG, PDF, PNG, SVG |
| Desktop apps | — | Yes |
Both are listed in Best Diagramming Software. On Specifiction, D2 scores higher on our published basis.