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.
New version 9.1 is now available!
Astah Professional and UML version 9.1 were released on June 28.
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.
MBSE tool that includes SysML, GSN, STPA/STAMP, SCDL for safety engineers.
Easy to use
Abundant online content
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!
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!
University faculty
Students
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.
Trusted & Used Worldwide
1,321schools
639,991users
37plug-ins
51friends of astah
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!
Plant UML Integration
Miro Integration
Try Astah for Free
Our free trials are fully functional. Experience the power of Astah for yourself!
You can uninstall Astah product(s) when you decided not to purchase a license after your evaluation is over. Here’s the instruction for uninstalling Astah.