Side by side
OmniGraffle vs StarUML
Both stand on diagramming tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial iPhoneMac
OmniGraffle offers structured diagramming, vector editing, automation, and broad file-format support for Apple platforms. The 14-day trial helps evaluation, while platform limits and Pro-tier distinctions matter when choosing a license.
Visit OmniGraffle Free trial ExtensionLinuxMac+1
StarUML covers a broad range of modeling languages and diagram outputs, with extensibility through JavaScript and extensions. Its paid, per-device licensing and stated platform requirements should guide purchase decisions.
Visit StarUMLThe facts
| OmniGraffle | StarUML | |
|---|---|---|
| Free plan | A free trial | A free trial |
| Open source | Not published | Not published |
| Runs on | iPhone, Mac | Extension, Linux, Mac, Windows |
| Lowest paid plan | OmniGraffle Subscription: $129.99 a year | StarUML V7 Standard: $129 per device, paid once |
| Plans published | 8 | 2 |
| Maker | OmniGraffle | StarUML |
| Website | omnigroup.com | staruml.io |
| On diagramming tools | #40 of 46 | #36 of 46 |
OmniGraffle: what it does well
- Supports many diagram and graph types
- Precise grouping, snapping, and alignment tools
- Graphviz provides several automatic layout styles
- Imports and exports multiple Visio formats
- Password or Touch ID document protection
What to know first
- No free plan
- Limited to iOS and macOS platforms
- Pro features require a Pro license or subscription
- Some listed licenses have substantial one-time costs
StarUML: what it does well
- Supports UML 2 and many additional modeling languages
- Creates diagrams from Mermaid descriptions
- JavaScript extension and community registry
- Code generation through open-source extensions
- Exports PNG, JPEG, SVG, PDF, and HTML
What to know first
- No free plan
- Pricing is a one-time per-device purchase
- Linux requirements list Ubuntu 22.04 or Fedora 40
- Professional plan costs $199 a month
Alternatives to OmniGraffle Alternatives to StarUML The whole list