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.
Astah PRO & UML v12 are Here:
Model Faster, Clean Less.
Say goodbye to messy layouts and manual panning. Stay in your creative flow with intelligent line routing, smart canvas auto-scrolling, and instant standalone cloning.
Check out v12 Release Note
Unleash your full potential
Astah offers a variety of tools so you can select what’s right for you.
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
Real-world diagramming tools in your classroom
Students
Free student licenses to jump start your career
Individuals
Brainstorm, visualize and communicate your ideas
Development teams
Team communication and collaboration for the enterprise
Our Academic Program
Astah brings UML, MBSE and safety design tools to classrooms worldwide,
helping students in STEM courses gain hands-on experience with tools used
in real projects.
Trusted & Used Worldwide
Figured complied by Change Vision, Inc. as of September 14, 2026.
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
A new plugin to import PlantUML diagrams to Astah and vice versa.
Miro Integration
Import UML Class diagram from miro to Astah and vice versa. Also an import of mind map from miro is supported.
The C4 model plugin
Create the C4 model diagrams in Astah for visualizing software architecture.
Image Note Plugin
Insert a picture directly into Note to boost the expression of your models and make your diagrams more intuitively understandable.
Try Astah for Free
Our free trials are fully functional. Experience the power of Astah for yourself!