What is Astah UML?

Astah UML is a desktop UML 2.x modeling application from Change Vision, Inc. It is designed for development teams, universities, and individual engineers who need standard UML diagrams without the complexity of a full systems-engineering suite.

Because designs are stored as models, an update made in one place carries through to every related diagram, which keeps design documentation consistent as a project grows.

Version 12.0, released in July 2026, brings AI into UML modeling. AI Chat Copilot and AI-assisted code reverse engineering run on your organization's own API key for OpenAI, Azure OpenAI, Claude, or Gemini, or for an OpenAI-compatible service. Local MCP server integration lets AI agents connect to Astah models.

Plans start at $6.99 per month. A free license is available for students, and a 20-day free trial is offered.
Astah UML runs on Windows, macOS, and Linux without a separate Java installation.

Pricing

Price Starts At:
$6.99 per month
Price Overview:
Plans from $6.99 per month. Free license for students. 20-day free trial.
Free Trial Offered?:
Yes

Integrations

Offers API?:
Yes, Astah UML provides an API

Screenshots and Video

Company Facts

Company Name:
Change Vision, Inc.
Date Founded:
2006
Company Location:
Tokyo, Japan
Company Website:
astah.net/products/astah-uml/
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Product Details

Deployment
Windows
Mac
Linux
On-Prem
Training Options
Documentation Hub
Video Library
Support
Web-Based Support

Product Details

Target Company Sizes
Individual
1-10
11-50
51-200
201-500
501-1000
1001-5000
5001-10000
10001+
Target Organization Types
Mid Size Business
Small Business
Enterprise
Freelance
Nonprofit
Government
Startup
Supported Languages
English
Japanese

Astah UML Categories and Features

Diagram Software

Data Import / Export
Drag & Drop
For Developers
Mind Map
Templates

More Astah UML Categories