D2 vs StarUML
| D2 | StarUML | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | $129/mo |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | Windows, macOS, Linux |
| Free plan | Yes | No |
| Diagram types | software architecture diagrams; UML class diagrams; sequence diagrams | UML 2, entity-relationship, data flow, flowchart, mindmap, C4, SysML, BPMN, UI wireframe, AWS architecture, GCP architecture, Azure architecture |
| Offline editing | Yes | — |
| Import/export formats | D2 (.d2); SVG; PNG; PDF; PPTX; GIF; ASCII | — |
| Real-time collaboration | — | Yes |
Both are listed in Best Diagramming Software. On Everything Xiaomi, D2 scores higher on our published basis.