SysON is an open-source, web-based MBSE tool for creating and editing SysML v2 models.
It combines graphical modeling, standards-based interoperability, and a flexible environment for systems engineering.
SysON provides an extensible modeling environment that can be customized to support specific engineering needs and methodologies, such as Arcadia.
SysON offers a modern, browser-based modeling environment to create, visualize, and share SysML v2 models without desktop installation.
SysON was presented during the Vendor Roadmaps and Implementation Status session of the MBSE Workshop held as part of the INCOSE International Workshop 2025, in Seville, Spain, on February 1, 2025.
We're thrilled to share that we've already made significant progress toward our goals!
As demonstrated in the quick demo, SysON is up and running—packed with powerful features and designed with a strong focus on user experience.
The project is on the right track and is already generating considerable interest.
Discover the video used to present SysON at this session.
Model-Based Systems Engineering (MBSE) helps engineers design, analyze, and manage complex systems
using models as a shared source of engineering information.
SysML v2 provides a standardized foundation for MBSE.
Developed by the Object Management Group (OMG), the Systems Modeling Language enables engineers to describe system structures, behaviors, and requirements using a common language. Its standardized textual notation and APIs support model exchange and interoperability across engineering tools.
SysON makes SysML v2 accessible through an open-source, web-based modeling environment.
It enables systems engineers to create, edit, and visualize SysML v2 models using graphical editors. Built on open standards, SysON also provides an extensible foundation for integrating modeling capabilities into broader engineering workflows.
SysON aims at facilitating systems engineers to seamlessly work with both SysML v2 and Capella. Exchange of architecture models with Capella will be natively supported in SysON.
SysON is ready to use for editing SysML v2 models out of the box.
However, if you are a large organization with specific modeling methodologies and tooling integration constraints, or a software provider delivering cutting-edge engineering solutions, you may need a native SysML v2 modeling environment tailored to your needs.
SysON is designed for this, offering flexibility and seamless integration, making it adaptable to your specific requirements or embeddable within another application:
Examples:
Obeo provides expertise to help you integrate SysON within your organization, and tailor or extend it to fit your needs.
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Obeo Enterprise for SysON is a professional offering built on top of SysON. It enhances SysON with enterprise features: Security & Permissions, Team Collaboration, Project Lifecycle Management.
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Obeo is also preparing a secure cloud-based offering to provide SysON as a fully hosted SaaS solution, enabling users to access and use it without any deployment on their machines or servers.
Stay tuned…SysML v2 provides a powerful language for systems modeling.
But a modeling language alone does not tell engineers how to structure their engineering activities or approach complex system architectures.
Capella for SysON is an open-source extension that brings the Arcadia methodology, proven through years of industrial use, to the SysML v2 ecosystem.
By combining Arcadia's structured engineering approach with Capella-inspired graphical representations, it guides engineers through dedicated modeling activities, exposing the concepts and tools relevant to each stage of system design.
The result: the power and interoperability of SysML v2, with the methodological guidance needed to make modeling more accessible, consistent, and scalable.
Discover Capella for SysON
The project team works in an iterative mode to deliver a new version every 8 weeks.
The first release of SysON, version 2023.12, was launched in December 2023 by Obeo and CEA List.
The SysON roadmap takes into account user feedback and needs identified as part of an Open Innovation approach.
For the next months, our main goals include:
SysON is under active development and evolving rapidly.
Our team follows an agile 8-week release cycle, ensuring steady progress and frequent feature updates and bug fixes.
As some capabilities are still maturing, features and the user experience may change between releases.
We are fully committed to making SysON a best-in-class SysML v2 tool.
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