Astah UML review
A broad, affordable cross-platform UML tool with collaboration, reverse engineering, and AI features.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Astah UML is desktop UML modeling software for software engineers, students, and development teams. It supports UML 2.x class, use case, state machine, activity, sequence, timing, communication, component, deployment, and composite structure diagrams. The product runs on Windows, macOS, and Linux, and includes diagram editing, model search, automatic layout, project-file merging, and concurrent project work support. Eligible university students can access free student licensing, while other users can evaluate the product through a 20-day fully functional trial.
Pricing is straightforward at the entry level: the published plan lists an Individual subscription at $6.99 per month, billed monthly, and includes an Astah UML individual license. The product also adds practical engineering capabilities through code generation plug-ins and reverse engineering for Java, C#, and C++. Import and export support covers image, RTF, HTML, and XML formats. These options make Astah UML a fit for individual developers, students, and teams that need traditional UML work alongside code-oriented workflows without limiting platform choice.
Its ecosystem includes Miro, PlantUML, yUML, and FreeMind, while the Astah API supports reading, creating, and modifying models and diagrams. Collaboration-oriented features include project-file merging and concurrent project work, but the category specifications identify desktop deployment and no model repository. Version 11 and later add AI Chat Copilot and AI-powered code reverse. Choose Astah UML when broad diagram coverage, cross-platform desktop access, and reverse engineering matter. Teams that require a centralized model repository should consider an alternative with that capability.
Astah UML pros and cons
- Where it wins
- Broad UML 2.x diagram coverage
- Java, C#, and C++ reverse engineering
- Runs on Windows, macOS, and Linux
- Where it doesn't
- Desktop deployment without a model repository
- Advanced AI features require version 11 or later
- Free access is limited to eligible university students
Astah UML fact sheet, pricing and score →
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