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features
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support

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Description

Astah SysML helps systems engineers capture requirements, structure, and behavior in SysML v1 without the weight of a large enterprise suite. Block definition and internal block diagrams, requirement diagrams and tables, parametric diagrams, and use case, state machine, activity, and sequence diagrams are all included, along with mind maps for early concept work. Each diagram is a view of one shared model, so updating a requirement or block keeps every related diagram in step. Assist functions such as double-click creation, creating multiple elements from text, and alignment guides reduce drawing time. Models can be exchanged through XMI and with Cameo Systems Modeler, and profiles let teams extend the language. For AI-assisted work, AI Chat Copilot connects to OpenAI, Azure OpenAI, Claude, Gemini, or any OpenAI-compatible endpoint through your own API key, and a local MCP server lets external AI agents read and work with your models. Astah SysML runs locally on Windows and macOS. It does not include simulation. Developer: Change Vision, Inc. Current version: 11.0 (March 2026).

Description

System Composer™ facilitates the detailed specification and evaluation of architectures within the realm of model-based systems engineering and software architecture modeling. By utilizing System Composer, users can effectively allocate requirements while enhancing an architecture model, which can subsequently be designed and tested in Simulink®. Users have the flexibility to create architecture models composed of components and interfaces either from scratch, by importing from other tools, or by leveraging the architectural elements already present in Simulink designs. Furthermore, it allows for the representation of a system through various architecture models, enabling the establishment of direct connections between them through model-to-model allocations. Behavioral aspects can be documented using sequence diagrams, state charts, or Simulink models, providing a comprehensive overview of system dynamics. Additionally, you can specify and simulate the order of execution for component functions, and even generate code from your software architecture models utilizing tools like Simulink and Embedded Coder®. This seamless integration ensures a robust framework for developing complex systems efficiently.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Azure OpenAI Service Yes 
Cameo Systems Modeler Yes 
Claude Yes 
Gemini Yes 
OpenAI Yes 

Integrations

Azure OpenAI Service No 
Cameo Systems Modeler No 
Claude No 
Gemini No 
OpenAI No 

Pricing Details

$140/year
1-year license: $140. 1-year floating license: $270. 20-day free trial.
Free Trial Yes 
Free Version No 

Pricing Details

$740 per year
Free Trial Yes 
Free Version No 

Deployment

Web-Based No 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
Mac Yes 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Change Vision, Inc.

Founded

2006

Country

Japan

Website

astah.net/products/astah-sysml/

Vendor Details

Company Name

MathWorks

Founded

1984

Country

United States

Website

www.mathworks.com/products/system-composer.html

Product Features

Product Features

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