The power of software modeling

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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New Academic Program

Astah unleashes the UML, MBSE + Safety design tools, used by over 640,000 users and 1,300 schools, to empower more students in STEM courses around the globe.

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Easy to use
abundant online content
Abundant online content
extensive add-on library
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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Diagramming tool for individuals & teams of all sizes

Astah’s tools allow you to create a wide variety of diagrams and offer flexible pricing based on your needs. Whether you’re a student just starting out, part of an enterprise-wide development team, or an academic faculty member, we have a package that is right for you!

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Unleash your full potential

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

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Trusted & Used Worldwide

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Our Plugin Library

By adding the free plugins, you are able to tailor Astah to fit your needs! Here’re some of our popular plug-ins!

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Try Astah for Free

Our free trials are fully functional. Experience the power of Astah for yourself!