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Head-to-head · UML Modeling Software

Eclipse Papyrus vs Altova UModel

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Eclipse Papyrus #5 in UML Modeling Software 8.7/10 Free plan Free plan✓ 0 of 4 features Visit Papyrus
Altova UModel #6 in UML Modeling Software 8.6/10 30-day trial Free trial✓ 4 of 4 features Visit Altova UModel

Eclipse Papyrus leads on 1 check, Altova UModel on 0, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreEclipse Papyrus · 8.7/10
  • Free planonly Eclipse Papyrus
  • Free trialonly Altova UModel
  • Most featuresAltova UModel · 4 of 4

Eclipse Papyrus scores higher on our rubric for uml modeling software: 8.7 against 8.6 out of 10; our editors rank them #5 and #6.

Eclipse Papyrus offers free plan; Altova UModel doesn't.

Eclipse Papyrus is the better fit for open-source UML and SysML teams. Altova UModel is the better fit for windows teams needing code-connected UML.

  • Eclipse Papyrus fits best

    Open-source UML and SysML teams

  • Altova UModel fits best

    Windows teams needing code-connected UML

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 Eclipse Papyrus 8.7/10 Visit ↗ Altova UModel 8.6/10 Visit ↗
At a glance
Editor score 8.7 8.6
Ranking #5 in UML Modeling Software #6 in UML Modeling Software
Best for Open-source UML and SysML teams Windows teams needing code-connected UML
Pricing model Free Paid
Starting price Free plan $209/user one-time
Free plan ✓ (best) —
Free trial — 30 days
Deployment Cloud, Desktop Desktop
Platforms Web, Windows, macOS, Linux Windows
Support Community, Docs Email, Tickets, Community, Docs
Integrations 4 integrations 4 integrations
Built for Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Eclipse Papyrus 0/4 · Altova UModel 4/4
Code generation Not checked yet ✓ (best)
Reverse engineering Not checked yet ✓ (best)
Team collaboration Not checked yet ✓ (best)
Model repository Not checked yet ✓ (best)
Specs
UML diagram types Not checked yet Class, activity, component, communication, composite structure, deployment, interaction overview, object, package, profile, sequence, state machine, timing, use case
Deployment Not checked yet Desktop
Supported platforms Not checked yet Windows 10, Windows 11, and Windows Server 2016 or newer
Our review
Pros
  • Covers UML 2.5 and SysML 1.6 with graphical and tabular editors
  • Supports model execution, animation, and simulation through Moka
  • Papyrus-Web provides real-time simultaneous collaboration at no cost
  • 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
Cons
  • Papyrus-Classic is no longer actively maintained
  • The toolset spans separate desktop, web, and Eclipse components
  • Real-time collaboration is provided through Papyrus-Web, not the desktop edition
  • 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
Our verdict

Eclipse Papyrus is an open-source modeling environment for UML and related systems-modeling standards. It is suited to industrial model-based engineering, academic teaching, and research teams that need UML 2.5, SysML 1.6, and a broad set…

Read the review →

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 →
  1. Eclipse PapyrusUML Modeling Software 8.7Free plan
  2. Altova UModelUML Modeling Software 8.630-day trial

Strengths and trade-offs

  • Eclipse Papyrus — where it wins

    • Covers UML 2.5 and SysML 1.6 with graphical and tabular editors
    • Supports model execution, animation, and simulation through Moka
    • Papyrus-Web provides real-time simultaneous collaboration at no cost

    Where it doesn't

    • Papyrus-Classic is no longer actively maintained
    • The toolset spans separate desktop, web, and Eclipse components
    • Real-time collaboration is provided through Papyrus-Web, not the desktop edition

  • 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

More comparisons

All UML modeling software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update