Astah System Safety

Astah System Safety

Change Vision, Inc.
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About

20-sim is a modeling and simulation software package for mechatronic systems. With 20-sim you can enter models graphically, similar to drawing an engineering scheme. With these models, you can simulate and analyze the behavior of multi-domain dynamic systems and create control systems. You can even generate C-code and run this code on hardware for rapid prototyping and HIL-simulation. 20-sim provides you with features that allow you to create models very quickly and intuitively. You can create models using equations, block diagrams, physics blocks and bond graphs. Various features help you to build your models, simulate them and analyze their performance. Models are built in the 20-sim editor. This editor contains a large model library with building blocks to help you to construct models. The model library contains many components such as block diagrams and bond graphs.

About

Astah System Safety is a model-based safety analysis tool for safety-critical systems, developed by Change Vision, Inc. It combines SysML modeling with STAMP/STPA hazard analysis, GSN/D-Case assurance cases, ASAM SCDL safety concepts, and UAF in one tool. Safety analyses are linked to the system model, so control structures, hazards, and safety arguments stay traceable to requirements and architecture. Safety engineers in automotive, aerospace, railway, and embedded systems use it to build safety cases for standards such as ISO 26262. AI Chat Copilot and a local MCP server require your own API key from a supported AI service (OpenAI, Claude, Gemini, or an OpenAI-compatible endpoint). SysML models can be exchanged with Cameo Systems Modeler through XMI import and export. Runs on Windows and macOS. FTA, FMEA, and simulation are not included. A 40-day free trial is available.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Not Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Simulation software that helps engineers with physics modeling

Audience

Safety and systems engineers in automotive, aerospace, railway, defense, robotics, and medical device development

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

€108 one-time payment
Free Version Not Supported
Free Trial Not Supported

Pricing

$550 per year
Annual license: $550 per user per year. Annual floating license: $1,050 per seat per year, with a self-hosted license server required. Per-seat floating prices decrease with larger packs (for example, $9,500 for 10 seats). Monthly licenses are not available.

For universities, the Faculty Site License ($900) covers Astah System Safety, Astah SysML, and Astah Professional for all faculty and students in a department.

A 40-day free trial is available. AI features (AI Chat Copilot and the local MCP server) require your own API key from a supported AI service, and API usage is billed separately by that provider.
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

20-sim
The Netherlands
www.20sim.com

Company Information

Change Vision, Inc.
Founded: 2006
Tokyo, Japan
astah.net/products/astah-system-safety/

Alternatives

Astah SysML

Astah SysML

Change Vision, Inc.

Alternatives

Astah SysML

Astah SysML

Change Vision, Inc.
SysMLv2 Editor

SysMLv2 Editor

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Cameo Systems Modeler

Cameo Systems Modeler

Dassault Systèmes
Syndeia

Syndeia

Intercax
Working Model 2D

Working Model 2D

Design Simulation Technologies

Categories

Categories

Integrations

Cameo Systems Modeler Not Supported
Microsoft Excel Not Supported
OpenAI Not Supported

Integrations

Cameo Systems Modeler Supported
Microsoft Excel Supported
OpenAI Supported
Claim 20-sim and update features and information
Claim 20-sim and update features and information
Claim Astah System Safety and update features and information
Claim Astah System Safety and update features and information