Audience
Systems engineers and teams who write SysML v2 models as text in Visual Studio Code and manage them in Git
About SysMLv2 Editor
SysMLv2 Editor is a Visual Studio Code extension for writing SysML v2 models in the textual notation, developed by Change Vision, Inc. Models are plain .sysml files, so they can be tracked in Git, compared in pull requests, and reviewed alongside source code.
Features include syntax highlighting, real-time validation against the SysML v2 grammar, navigate to definition, an outline view, and diagram generation for reviewing structure and behavior. Diagrams are read-only; editing happens in the text. For editing directly on diagrams, Change Vision offers SysMLv2 Modeler (early access).
SysMLv2 Editor runs on Windows, macOS, and Linux. It is included with an Astah SysML, Astah System Safety, or Astah Faculty Site License, with no separate purchase, and a 20-day free trial is available. It does not import SysML v1 models from Astah SysML.
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A Digital Thread is a graph whose nodes are elements in various enterprise repositories, tools, and version control systems, and whose edges are intra-model relationships within each tool and inter-model relationships created and managed by Syndeia between the nodes. Syndeia provides model transformation services to build the digital thread graph, such as drag-n-drop requirements from Jama or DOORS-NG to SysML, generate Simulink models and PLM part structures from SysML models, connect behavior elements in SysML to software code in GitHub, or track the development status of a sub-system in JIRA directly from SysML. Syndeia provides services to search, compare, and bi-directionally synchronize connected models in the digital thread, such as compare and sync changes in system architecture to PLM part structure, compare connected SysML and Simulink models, or sync changes in DOORS-NG requirements to SysML.
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Astah System Safety
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 (Goal Structuring Notation) assurance cases, ASAM SCDL, 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. It is used by safety engineers in automotive, aerospace, and embedded systems, including safety-case work for standards such as ISO 26262.
AI Chat Copilot works with your own API key for OpenAI, Azure OpenAI, Claude, Gemini, or an OpenAI-compatible service, and a local MCP server connects external AI agents to your models. Models can be exchanged through XMI and with Cameo Systems Modeler.
Astah System Safety runs on Windows and macOS. FTA and FMEA are not included. A 40-day free trial is available.
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Astah SysML
Astah SysML is a SysML v1 modeling tool for systems engineering and model-based systems engineering (MBSE), developed by Change Vision, Inc. It supports block definition, internal block, requirement, parametric, use case, state machine, activity, and sequence diagrams, plus requirement tables and mind maps.
Designs are stored as models, so a change to a block or requirement is reflected in every diagram that uses it. Profiles, XMI import/export, and data exchange with Cameo Systems Modeler are supported.
AI Chat Copilot works with your own API key for OpenAI, Azure OpenAI, Claude, Gemini, or an OpenAI-compatible service, and a local MCP server lets external AI agents work with your models.
Astah SysML runs on Windows and macOS. Simulation is not included. A 20-day free trial is available.
For SysML v2, Change Vision offers separate products that run as Visual Studio Code extensions: SysMLv2 Editor and SysMLv2 Modeler (early access).
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Astah UML
Astah UML is a UML 2.x diagramming tool for software design, developed by Change Vision, Inc. It covers the core UML diagrams, including class, use case, sequence, activity, state machine, component, and deployment diagrams, plus mind maps.
Astah creates models rather than drawings: when you change a model element, every diagram that uses it is updated, so your design stays consistent.
AI features include AI Chat Copilot and AI-assisted code reverse engineering, which use your own API key for OpenAI, Azure OpenAI, Claude, Gemini, or an OpenAI-compatible service. A local MCP server lets external AI agents work with your Astah models. Conventional reverse engineering of Java, C#, and C++ code is also included.
Astah UML runs on Windows, macOS, and Linux with a bundled Java runtime. A free license is available for students, and a 20-day free trial is available.
Latest version: 12.0 (released July 15, 2026).
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Pricing
Starting Price:
$140 per year
Free Trial:
Free Trial available.
Integrations
Company Information
Change Vision, Inc.
Founded: 2006
Japan
astah.net/products/sysmlv2-editor/
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Product Details
Platforms Supported
Windows
Mac
Linux
On-Premises
Support
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