Powering Engineering Excellence with Astah

Astah’s modeling tools allow you to visualize the essence of your ideas and software designs. Quickly and effortlessly build diagrams that create a clear understanding among teams.
Build UML, ER diagrams, Data Flow Diagrams, Flowcharts, mind maps and more in the most powerful modeling software for everyone from students to enterprise teams.

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Astah System Safety & SysML v10 Released!

Discover What’s New in Astah V10 – Enhanced Performance & Features!

Check Out v10 Release Notes!
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Unleash your full potential

Astah offers a variety of tools so you can select what’s right for you.

Total software design tool with UML, ERD, flowchart, DFD, and more.

Astah Professional

Lightweight UML diagramming tool with mind mapping abilities.

Astah UML

Lightweight SysML modeling tool for systems engineering.

Astah SysML

MBSE tool that includes SysML, GSN, STPA/STAMP, SCDL for safety engineers.

Astah System Safety
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Easy to use
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Abundant online content
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Extensive add-on library

Astah advantages

Simplicity, quality, and community are what set Astah apart.
For more than a decade, we’ve been committed to creating software modeling tools with our customers in mind. Our extensive add-on library allows you to tailor Astah to your needs, and our abundant online content means you can easily find everything you need to start diagramming today!

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