Altova UModel vs Astah UML

Altova UModel8.6Visit Astah UML8.5Visit

Higher score Altova UModel #6 in UML Modeling Software 8.6/10 30-day trial Free trial✓ 4 of 4 features Visit Altova UModel

vs

Astah UML #7 in UML Modeling Software 8.5/10 Free plan · 20-day trial Free planFree trial✓ 3 of 4 features Visit Astah UML

• Altova UModel fits best

  Windows teams needing code-connected UML

• Astah UML fits best

  Affordable cross-platform UML modeling

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Side by side

Feature	Altova UModel 8.6/10 Visit ↗	Astah UML 8.5/10 Visit ↗
At a glance
Editor score	8.6	8.5
Ranking	#6 in UML Modeling Software	#7 in UML Modeling Software
Best for	Windows teams needing code-connected UML	Affordable cross-platform UML modeling
Pricing model	Paid	Free plan + paid
Starting price	$209/user one-time	$6.99/user/mo
Free plan	—	✓ (best)
Free trial	30 days	20 days
Free trial length	30 days	20 days
Deployment	Desktop	Desktop
Platforms	Windows	Windows, macOS, Linux
Support	Email, Tickets, Community, Docs	Email, Docs
Integrations	4 integrations	4 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Altova UModel 4/4 · Astah UML 3/4
Code generation	✓	✓
Reverse engineering	✓	✓
Team collaboration	✓	✓
Model repository	✓ (best)	—
Specs
UML diagram types	Class, activity, component, communication, composite structure, deployment, interaction overview, object, package, profile, sequence, state machine, timing, use case	Class, Use Case, State Machine, Activity, Sequence, Timing, Communication, Component, Deployment, Composite Structure
Deployment	Desktop	Desktop
Supported platforms	Windows 10, Windows 11, and Windows Server 2016 or newer	Windows, macOS, Linux
Our review
Pros	Generates Java, C++, C#, and Visual Basic .NET code Reverse engineers source code and binaries with round-trip synchronization Supports repositories, source control, and simultaneous team editing	Broad UML 2.x diagram coverage Java, C#, and C++ reverse engineering Runs on Windows, macOS, and Linux
Cons	Runs on Windows rather than across multiple desktop platforms No free plan; pricing starts at $209 SysML, BPMN, and IDE integration require Professional Edition or higher	Desktop deployment without a model repository Advanced AI features require version 11 or later Free access is limited to eligible university students
Our verdict	Altova UModel is a Windows desktop UML modeling application for software developers and development teams. It supports UML 2.5.1 modeling across 14 diagram types, including class, activity, component, sequence, state machine, and use case… Read the review →	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… Read the review →

Strengths and trade-offs

• Altova UModel — where it wins

  • Generates Java, C++, C#, and Visual Basic .NET code
  • Reverse engineers source code and binaries with round-trip synchronization
  • Supports repositories, source control, and simultaneous team editing

  Where it doesn't

  • Runs on Windows rather than across multiple desktop platforms
  • No free plan; pricing starts at $209
  • SysML, BPMN, and IDE integration require Professional Edition or higher

• Astah UML — 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

• Altova UModel8.6/10 · 30-day trial

  A Windows UML tool for teams that need models connected to application code.

  Visit Altova UModelFull verdict →
• Astah UML8.5/10 · Free plan · 20-day trial

  A broad, affordable cross-platform UML tool with collaboration, reverse engineering, and AI features.

  Visit Astah UMLFull verdict →