D2 vs Preceden
| D2 | Preceden | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | $10/mo |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | Web |
| Free plan | Yes | Yes |
| Diagram types | software architecture diagrams; UML class diagrams; sequence diagrams | timelines, Gantt charts, project roadmaps, legal chronologies, comparative timelines |
| Offline editing | Yes | — |
| Import/export formats | D2 (.d2); SVG; PNG; PDF; PPTX; GIF; ASCII | CSV, XLSX, PDF, PNG, PPTX |
| Real-time collaboration | — | No |
Both are listed in Best Diagramming Software. On Freedom251, Preceden scores higher on our published basis.