About Astah by ChangeVision

Astah is passionate about the power of visualization. Our modeling and diagramming software helps engineers and developers plan, create, communicate and understand.

Learn about us and explore the power of Astah.

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Astah software modeling tools

About the company

Astah was originally created by Japanese company ChangeVision in 2006 as a UML modeling tool. The software has grown to include six different tools, each designed to meet different diagramming needs, including UML, SysML, GSN, and more.
Today, the company’s vision is guided by Kenji Hiranabe and remains committed to simplicity, quality, and community.

Learn more

Our blog

Astah is so much more than just a diagramming software. It is part of a development methodology that values strategic planning and communication across teams. With our blog, we hope to inspire the software engineering industry to follow these best practices, and we continue to provide excellent documentation for our simple but powerful tools!

Explore the blog
Friends of Astah

Friends of Astah

The Friends of Astah program welcomes software developers, authors, conference presenters and others who love working with Astah. Our friends do awesome work with Astah, and we are happy to support them! Meet some of our Friends, hear what they have to say about Astah, and learn more about how you can join the program.

Meet our friends
software diagram collaboration



Most Astah software editions, including Professional, UML, SysML, GSN and more, are available from many resellers as well as our own online store. Find a reseller near you.

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Looking for more information about the Astah diagramming and modeling software?

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