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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.

What is Astah System Safety?

Astah System Safety is a robust platform tailored for model-based safety evaluations in critical environments, developed by Change Vision, Inc. This cutting-edge software merges SysML modeling with STAMP/STPA hazard evaluations, GSN (Goal Structuring Notation) assurance cases, ASAM SCDL, and UAF, all within a unified interface. By establishing a direct connection between safety assessments and the system model, it guarantees that control structures, hazards, and safety arguments can be traced back to both the requirements and the overall system architecture. This tool is especially beneficial for safety engineers engaged in industries such as automotive, aerospace, and embedded systems, aiding in the development of safety cases that adhere to standards like ISO 26262. Furthermore, the AI Chat Copilot feature employs your own API key to access various services, including OpenAI and Azure OpenAI, while also linking to a local MCP server to facilitate the integration of external AI agents with your models. Users can conveniently share models using XMI format and collaborate more effectively with Cameo Systems Modeler. Astah System Safety is compatible with both Windows and macOS, although it does not support Fault Tree Analysis (FTA) or Failure Mode and Effects Analysis (FMEA). A complimentary trial period of 40 days is provided, allowing prospective users to evaluate its features before making a purchase. In conclusion, this tool signifies a notable leap forward in the quest to ensure the safety of intricate systems, making it an essential resource for professionals in the field.

Media

Media

No images available

Integrations Supported

Azure OpenAI Service
Claude
Gemini
HTML
Java
OpenAI
Redmine

Integrations Supported

API Availability

Has API

API Availability

Pricing Information

$6.99 per month
Plans from $6.99 per month. Free license for students. 20-day free trial.
Free Trial Offered?

Pricing Information

$550 per year
Free Trial Offered?

Supported Platforms

Windows
Mac
On-Prem
Linux

Supported Platforms

Windows
Mac
On-Prem

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Change Vision, Inc.

Date Founded

2006

Company Location

Japan

Company Website

astah.net/products/astah-uml/

Company Facts

Organization Name

Change Vision, Inc.

Date Founded

2006

Company Location

Japan

Company Website

astah.net/products/astah-system-safety/

Categories and Features

Diagram

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

Categories and Features

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