Astah is a modeling tool
Develop and Explore your designs
Astah’s best-in-class modeling software packages are the perfect tools for modeling, visualizing designs, achieving safe and secure systems. They allow you to communicate with your team and stakeholders such as your clients or electrical engineers to build better communications more efficiently.
Our suite of tools provide a complete solution for individual developers, engineering teams, and technical architects. When you use Astah’s tools to build requirements and architecture, your development efforts will be more efficient and streamlined.
UML Diagrams
UML, ER Diagram, Flowchart, Data Flow Diagram, Requirement Diagram and more.
View Brochure (PDF)
Free viewer for models created in Astah Professional and Astah UML. No license required.
ER Diagrams, Flowcharts, Data Flow Diagram
UML, ER Diagram, Flowchart, Data Flow Diagram, Requirement Diagram and more.
View Brochure (PDF)
SysML v1 Modeling
SysML diagrams, STAMP/STPA, ASAM SCDL and GSN included. XMI import/export is supported.
SysML v2 Modeling
Write SysML v2 models as text in Visual Studio Code. Included with an Astah SysML or Astah System Safety license.
Edit SysML v2 models as text and on diagrams inside Visual Studio Code. Early access request form is now open.
GSN, STAMP/STPA and ASAM SCDL
Can’t decide?
There’s an Astah product right for you. Our comparison chart will help you select the one that best meets your needs.
Compare our productsAcademic Special Offers
University faculty members can receive a discounted department-wide license for our four most popular products.
Students and faculty members receive a discount on individual Astah Pro licenses when used for instructional purposes.
Students with a valid college or university email can use the powerful Astah UML edition free for personal use.