Astah Professional vs Dia
Astah Professional
astah.netDia
dia-installer.deSide by side
| Figure | Astah Professional | Dia |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Diagram Software | 8.3 (#12) | 7.7 (#27) |
| Diagram types | It supports UML diagrams as well as ERD, DFD, flowchart, requirement diagram and table, mind map, and CRUD diagrams. | Entity-relationship diagrams; UML diagrams; flowcharts; network diagrams |
| Purpose | Astah Professional creates UML, ER, flowchart, and data flow diagrams to visualize software design. | Dia is a program for drawing structured diagrams. |
| Support | A perpetual license includes the first year of support and maintenance; continuing support and upgrades from year two require a support renewal license. | For problems, the site directs users to its FAQ and Dia bug reports. |
Plans
Astah Professional
- Astah Professional Individual Perpetual LicensePrice not published
In their own words
Astah Professional
Astah Professional is a desktop modeling tool for visualizing software design with diagrams and code-related models. It supports UML diagrams, ERD, data flow, flowchart, requirement, CRUD, and mind map diagrams. ER diagrams can be created manually or generated from imported database tables, with SQL export and reverse engineering. Modeling features include automatic layout, traceability maps, project comparison and merging, map view, and state-transition paths and tables. Astah can reverse engineer Java, C#, and C++ and generate code for PHP, SQL, and other languages. Team features cover file locking, file merging, model comparison, and read-only project references; real-time collaboration is not available. Its API and Script Editor can retrieve model information and create or modify diagrams and models. Plug-ins listed include Mermaid, Microsoft Office, Redmine, and Miro. AI Chat Copilot requires an external provider API key or endpoint. Supported platforms listed for Professional 12.0 include Windows 11 x64, macOS 13+ arm64, Ubuntu 24.04, and Rocky Linux 9.6.