Astah UML
Astah UML: A broad, affordable cross-platform UML tool with collaboration, reverse engineering, and AI features. Ranked #7 of 26 in UML Modeling Software by our editors (8.5/10); pricing: Free plan · 20-day trial; best for affordable cross-platform UML modeling.
At a glance
- Editor score8.5 / 10
- PricingFree plan · 20-day trial
- Best forAffordable cross-platform UML modeling
- Free planYes
- Paid from$6.99/user/mo
- UML diagram typesClass, Use Case, State Machine, Activity, Sequence, Timing, Communication, Component, Deployment, Composite Structure
- Founded2006 · Fukui City, Fukui, Japan
- Facts checked22 Sep 2026
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
Our verdict on Astah UML
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.
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Astah UML pricing
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Astah UML fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $6.99/user/mo |
| UML diagram types | Class, Use Case, State Machine, Activity, Sequence, Timing, Communication, Component, Deployment, Composite Structure |
| Code generation | Yes |
| Reverse engineering | Yes |
| Team collaboration | Yes |
| Deployment | Desktop |
| Supported platforms | Windows, macOS, Linux |
| Model repository | No |
| Free trial | 20 days |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: Miro, PlantUML, yUML, FreeMind |
| Pricing | Free plan · 20-day trial (source) |
| Website | astah.net |
| Facts checked | 22 Sep 2026 |
Astah UML integrations
Astah UML lists 4 integrations on its own site.
- Miro
- PlantUML
- yUML
- FreeMind
Alternatives to Astah UML
- IBM Engineering RhapsodyA broad engineering suite for teams connecting models, code, requirements, and verification.9.3
- Sparx Enterprise ArchitectA broad enterprise modeling suite with deep repositories, engineering and versioning features.8.9
- IBM Rational Software Architect DesignerA broad enterprise modeling platform for teams that need traceability and transformation workflows.8.9
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Astah UML vs the competition
- Astah UML vs IBM Engineering Rhapsody
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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