| Price from | $3/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 2 | 0 |
| Spec score · Diagramming Software | 8.7 (#9) | 7.9 (#31) |
| Spec score · Diagramming tools | 8.1 (#29) | 7.6 (#36) |
| Diagram features | Users can create multi-page diagrams on an infinite canvas, start from templates, group and lock symbols, and undo or redo actions. | D2 supports themes, sketch mode, animations, LaTeX, Markdown, code snippets, tables, containers, imports, variables, and interactive links and tooltips. |
| Diagram types | cloud architecture diagrams,network diagrams,flowcharts | software architecture diagrams; UML class diagrams; sequence diagrams |
| Export formats | Diagrams can be printed or exported as JPG, JSON, PDF, PNG, or SVG files. | The CLI exports diagrams to SVG, PNG, PDF, PPTX, GIF, and ASCII. |
| Free plan | Yes | Yes |
| Import/export formats | JSON,JPG,PDF,PNG,SVG | D2 (.d2); SVG; PNG; PDF; PPTX; GIF; ASCII |
| Offline editing | No | Yes |
| Purpose | CloudSkew is an online diagram and flowchart editor for creating cloud architecture diagrams and flowcharts. | D2 is a declarative diagramming language that turns text into diagrams. |
| Support | The FAQ directs users needing subscription cancellation assistance to [email protected]. | The project directs users to Discord for help and GitHub Issues and Discussions for bugs, proposals, and feature requests. |