StarUML

Name: StarUML
Price: 129 USD

Windows · Mac · Linux · Extension · paid plans from $129/mo

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Freedom report

Two barsScore 5.1

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

StarUML is ranked #36 of 45 in diagramming software on Freedom251, made by StarUML (Seoul, Republic of Korea). It runs on Browser extension, Linux, macOS, Windows. There is no free plan. A free trial is offered. Paid plans start at $129/mo.

StarUML plans and pricing

All plans

StarUML V7 Standard $129/mo One-time payment; use forever; VAT excluded 1+ devices staruml.io · 20 Sept 2026

StarUML V7 Professional $199/mo One-time payment; use forever; VAT excluded 1+ devices staruml.io · 20 Sept 2026

StarUML V7 Standard $129 once One-time payment per device; $129.00/device (VAT excl.) UML · ERD · Flowchart · Data Flow Diagram · Mindmap · C4 Model · Mermaid Support staruml.io · 7 Oct 2026

StarUML V7 Professional $199 once One-time payment per device; $199.00/device (VAT excl.) All Standard features · SysML · BPMN · UI Wireframe · AWS Architecture · GCP Architecture · Azure Architecture staruml.io · 7 Oct 2026

Compared on diagramming software

Free plan: No
Real-time collaboration: Yes
Diagram types: UML 2, entity-relationship, data flow, flowchart, mindmap, C4, SysML, BPMN, UI wireframe, AWS architecture, GCP architecture, Azure architecture

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The record

Purpose: StarUML describes itself as a software modeler for agile and concise modeling.
Modeling languages: A single project can use UML, ERD, Dataflow, Flowchart, Mindmap, C4, SysML, BPMN, Wireframe, AWS, GCP, and Azure modeling.
UML diagrams: StarUML supports most UML 2 diagrams, including class, package, component, deployment, use case, sequence, statechart, and activity diagrams.
Diagram generation: Users can create diagrams from Mermaid syntax by writing text descriptions.
Extensions: StarUML is designed to be extended and customized with JavaScript, and its registry lists community-developed open-source or proprietary extensions.
Code generation: Code generation for Java, C#, C++, and Python is available through open-source extensions.
Model files and CLI: Modeling data is stored in JSON, and the command-line interface can generate code, documentation, and images.
Trial: The download page offers a 30-day free trial.
Platform requirements: StarUML is available for macOS 10.13 or later, Windows 10 or later, and Linux, with Ubuntu 22.04 or Fedora 40 or later listed as requirements.
Pricing terms: The pricing page says payment is one-time for each device, with no monthly or annual fees.
Educational discount: The maker offers a 30% educational discount for students, teachers, universities, and schools, subject to proof of eligibility.
Privacy and security: MKLabs says it uses technical and organizational security measures to protect personal information, while noting that no internet transmission or storage technology can be guaranteed fully secure.
Support: The privacy notice directs questions and concerns to [email protected].
Maker and headquarters: MKLabs identifies itself as a software development company, names Seoul, Republic of Korea as its headquarters address, and identifies Minkyu Lee as its founder and CEO.
Price from: $129/mo

Where it ranks on Freedom251

Best Diagramming Software in 2026#36 of 45
Best Diagram Software in 2026#32 of 37
Best UML Modeling Software in 2026#21 of 24

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Sources

staruml.io· checked 7 Oct 2026
staruml.io/%20and%20https://staruml.io/extensions· checked 7 Oct 2026
staruml.io/download· checked 7 Oct 2026
staruml.io/pricing/· checked 7 Oct 2026
staruml.io/legals/privacy/· checked 7 Oct 2026
mklaabs.com· checked 7 Oct 2026