Safety and security for engineers

UML & ERD platform for software development

Model and analyze complex systems

3 reasons to use Astah

Instant
Usability

Astah is easy for a beginners, yet robust enough to design complex systems.

Enabling
Communication

Diagrams beyond UML, so you share more information in less time.

Extensibility
through Plug-ins

Tailor Astah to fit your needs with our plug-ins, or write your own.

Friends of Astah

Software developers, authors, even biologists all belong to Friends of Astah. They do awesome work, we do a little bit to support that.

Companies who use Astah

LEARN TIPS FOR ASTAH, UML, AND AGILE

Learn how to get started with Astah

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Install Astah Free Plugins easily!

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Get an Intro to Class Diagrams

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See how Astah works

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We give students Astah licenses for FREE

Our People

It takes a great team to do great things!