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StarUML

Input—per 1M tokens
Output—per 1M tokens
Context—tokens
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About

StarUML is ranked #42 of 45 in diagramming software on Inferse, made by StarUML (Seoul, Republic of Korea). It runs on Windows, macOS, Linux. There is no free plan. Paid plans start at $129/mo.

Compared on diagramming software

Free plan
Nostaruml.io
Real-time collaboration
Yesstaruml.io
Diagram types
UML 2, entity-relationship, data flow, flowchart, mindmap, C4, SysML, BPMN, UI wireframe, AWS architecture, GCP architecture, Azure architecturestaruml.io

Company

Headquarters
Seoul, Republic of Koreastaruml.io · 28 Sept 2026

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Where it ranks on Inferse

Sources