Altova UModel vs BOUML

Altova UModel8.6Visit BBOUML8.4Visit

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

B BOUML #8 in UML Modeling Software 8.4/10 Free plan Free plan✓ 3 of 4 features Visit BOUML

• Altova UModel fits best

  Windows teams needing code-connected UML

• BOUML fits best

  Free engineering-focused UML teams

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Altova UModel 8.6/10 Visit ↗	BBOUML 8.4/10 Visit ↗
At a glance
Editor score	8.6	8.4
Ranking	#6 in UML Modeling Software	#8 in UML Modeling Software
Best for	Windows teams needing code-connected UML	Free engineering-focused UML teams
Pricing model	Paid	Free
Starting price	$209/user one-time	Free
Free plan	—	✓ (best)
Free trial	30 days	—
Deployment	Desktop	Desktop
Platforms	Windows	Windows, macOS, Linux
Support	Email, Tickets, Community, Docs	Email, Docs
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market
Features Altova UModel 4/4 · BOUML 3/4
Code generation	✓	✓
Reverse engineering	✓	✓
Team collaboration	✓	✓
Model repository	✓ (best)	Not checked yet
Specs
UML diagram types	Class, activity, component, communication, composite structure, deployment, interaction overview, object, package, profile, sequence, state machine, timing, use case	use case, sequence, communication, class, composite class, activity, state, object, composite object, component, deployment
Deployment	Desktop	Desktop
Supported platforms	Windows 10, Windows 11, and Windows Server 2016 or newer	Windows, Linux, macOS
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	Covers a broad set of UML 2 diagram types Generates source code for seven listed languages and MySQL Includes Project Control and Project Synchro for multi-person work
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 limits the product to Windows, Linux, and macOS Round-trip engineering is limited to C++, Java, and PHP Reverse engineering covers fewer languages than code generation
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 →	BOUML is a free desktop UML 2 modeling tool for engineering teams that need more than diagram creation. It supports use case, sequence, communication, class, composite class, activity, state, object, composite object, component, and… 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

• BOUML — where it wins

  • Covers a broad set of UML 2 diagram types
  • Generates source code for seven listed languages and MySQL
  • Includes Project Control and Project Synchro for multi-person work

  Where it doesn't

  • Desktop deployment limits the product to Windows, Linux, and macOS
  • Round-trip engineering is limited to C++, Java, and PHP
  • Reverse engineering covers fewer languages than code generation

• Altova UModel8.6/10 · 30-day trial

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

  Visit Altova UModelFull verdict →
• BBOUML8.4/10 · Free plan

  A broad, engineering-focused UML desktop tool with generation, reverse engineering, and team features.

  Visit BOUMLFull verdict →