Tool comparison
SysML v2 tools compared
Most tools here add an AI assistant to a modeling tool. MBEstudio is built the other way round: an engineering environment that AI agents work in, with a compiler, executable requirements and simulation checking what they produce. Fourteen SysML v2 and AI systems engineering tools, MBEstudio included: where each runs, what it offers, who it suits best and how MBEstudio differs. Updated October 2026. Choosing beyond SysML v2? See the best MBSE software in 2026, ranked, or go head to head: MBEstudio vs Dalus and MBEstudio vs Cameo. What sets MBEstudio apart.
Technical moat
What an AI assistant on a modeling tool does not give you
Any tool can put a language model next to a diagram. The difference is what checks the result. These are the parts of MBEstudio that an agent relies on, and they take years of engineering rather than a prompt.
One SysML v2 compiler, everywhere
A native compiler written in Rust and built to WebAssembly. The same compiler runs in the browser studio, in agent jobs over MCP, on the command line and in CI, and our CI checks it against the OMG Pilot implementation. The model an agent writes is the model an engineer reviews.
Requirements that compute
Each executable requirement returns a value, a limit and a margin from the model's own equations. A missing input stays indeterminate instead of passing, so an agent cannot fill a gap with a plausible number and call it satisfied.
Behavior and trades from the model
Declared state machines execute with requirement verdicts over time, including when a requirement applies. Declared trade studies sweep up to 256 design points against stated objectives and return the Pareto front.
Geometry from the same source
Parts carry authored procedural geometry or envelopes, placed in an assembly. The model exports to STL and USD and opens in NVIDIA Isaac Sim, so packaging and sensor coverage come from the model being evaluated.
An agent interface, not a chat box
A remote MCP server any agent can call: Claude, Copilot, ChatGPT, Cursor or Codex. Agents submit a structured specification that is checked for free with the same rules the paid tools run, then compile, verify with SHACL shapes, simulate and export, each job metered and capped.
Works with the tools programs already run
Import Cameo XMI and .mdzip projects, exchange requirements with DOORS 9 and DOORS Next through ReqIF, link through OSLC, pull test evidence from an OSLC QM provider, and serve models over the SysML v2 API.
What it does not do yet: the compiler covers a supported SysML v2 subset, and simulation is discrete with no continuous physics solver in the agent tools. See the known limits.
How to choose
Six questions that narrow the field
Where must it run?
Desktop, browser, VS Code or on your own servers. Controlled programs often decide this before anything else.
What is the source of truth?
SysML v2 text you can diff and review in git, a diagram repository, or a requirements graph. It decides how reviews and merges work.
What checks the AI?
Drafting a model is easy now. Ask what validates the result, what happens to a missing input, and whether you can see where each value came from.
Model or evaluate?
Some tools edit and visualise the model. Others run it: simulation, budgets, margins, trades and geometry. Know which one you need.
Who edits at once?
Live multi-user editing on one model is a real requirement for large programs and an overhead for a single engineer.
What does it cost to try?
Open source, a published self-serve price, or an enterprise sales process. It sets how quickly you can find out if it fits.
At a glance
Capability matrix
| Tool | Runs in a browser | SysML v2 text | AI builds or edits the model | Simulation or execution | Works with your own AI agent | Open source | On-premise | Physical evaluation from the model |
|---|---|---|---|---|---|---|---|---|
| MBEstudio | ✓ | ✓ | ✓ | ✓ | ✓ | · | ✓ | ✓ |
| Flow Engineering | ✓ | · | ✓ | · | · | · | · | · |
| SysGit | · | ✓ | ✓ | · | · | · | · | · |
| Kotar (Planetary Utilities) | ✓ | ✓ | · | · | · | · | · | · |
| Dalus | ✓ | · | ✓ | ✓ | · | · | ✓ | · |
| Eclipse SysON | ✓ | ✓ | · | · | · | ✓ | ✓ | · |
| Innoslate (SPEC Innovations) | ✓ | · | ✓ | ✓ | · | · | · | · |
| Syside (Sensmetry) | · | ✓ | ✓ | · | ✓ | · | · | · |
| Ansys SAM | ✓ | ✓ | · | ✓ | · | · | · | · |
| Visual Paradigm SysML v2 Studio | ✓ | ✓ | ✓ | · | · | · | · | · |
| SysModeler | ✓ | ✓ | ✓ | · | · | · | · | · |
| Valispace (Altium) | ✓ | · | ✓ | · | · | · | · | · |
| Siemens Systems Modeler for SysML v2 | ✓ | · | · | · | · | · | · | · |
| CATIA Magic / Cameo | · | ✓ | · | ✓ | · | · | · | · |
✓ means the capability is stated in the vendor's public material as of October 2026. A dot means we did not find it stated, not that the tool lacks it. Tell us what we missed.
Side by side
Fourteen tools, one table
| Tool | Runs on | What it offers | Best for | Where MBEstudio differs |
|---|---|---|---|---|
| MBEstudio | Web, on-premise, remote MCP server for your own AI agent, command line | An engineering environment for AI agents: the built-in agent or your own (Claude Code, Codex, Cursor, ChatGPT) writes SysML v2, a compiler checks it, and requirements, state behavior and trades are evaluated in the model. | Engineering teams with rapid development lifecycles who use AI agents: every design change is traced through one integrated model, its impact evaluated, and each requirement returns a value, a limit and a margin. | This is us. |
| Flow Engineering | Web | AI-native requirements and systems graph with a copilot and agents for traceability, verification planning and change impact. | Requirements-led hardware programs that want AI agents across requirements, tests and change impact. | Keeps the model as SysML v2 text and computes each requirement's value from that model, with its limit and margin. |
| SysGit | Collaborative IDE on Git | Text-first SysML v2 IDE with a live graph of the model and agentic AI for model improvement. | Engineers who want SysML v2 text under Git review workflows, with a defense focus. | Shares the text-first approach and adds physical evaluation: geometry, clearance, budgets and requirement margins over time. |
| Kotar (Planetary Utilities) | Web, with local services on your machine | Browser IDE for SysML v2 with synced textual and graphical editors, integrated Git, Flexo integration, and expression evaluation, constraint propagation and requirement verification. | Engineers who want a SysML v2 IDE in the browser with Git and Flexo model repositories. | Adds an agent that writes the model and an MCP server for your own agent, plus geometry, state machine simulation and trades from the same text. |
| Dalus | Web, on-premise option | SysML v2 architecture, requirements and behavioral simulation with Python in the loop and an AI copilot. | Collaborative architecture work with Python-driven simulation, including controlled programs on premise. | Derives geometry, mass and power in metres and kilograms from the model text and evaluates every requirement margin against them. |
| Eclipse SysON | Web, open source | SysML v2 modeler from Obeo and CEA with graphical, textual and form-based editors. | An open-source, graphical SysML v2 modeler you can host and extend yourself. | Adds an AI agent checked by a compiler, and evaluated results: margins, budgets and trades. |
| Innoslate (SPEC Innovations) | Cloud | Full-lifecycle MBSE on LML and SysML with discrete event and Monte Carlo simulators and AI checks on requirement quality. | Lifecycle programs that want LML, DoDAF and UAF views and built-in discrete event simulation. | Writes the model as SysML v2 text and checks it with a compiler, then evaluates margins against geometry, mass and power derived from it. |
| Syside (Sensmetry) | VS Code extension, Python library | SysML v2 editor with the Automator Python library for analysis, automation and code generation. AI assistants can read and contribute to models. | Engineers who live in VS Code and want to script SysML v2 analysis and code generation in Python. | Pairs the text with a studio: 3D, diagrams, simulation and requirement evaluation in the browser, from the same compiler. |
| Ansys SAM | Web | SysML v2 modeler with real-time collaboration, graphical and tabular views, and initial behavior execution with diagram animation. | Browser SysML v2 modeling tied to Ansys workflows for requirements verification, safety, cybersecurity and mission engineering. | Adds an AI agent that writes the model and a compiler that checks it, plus geometry, budgets and requirement margins from the same text. |
| Visual Paradigm SysML v2 Studio | Web | SysML v2 editor with AI code generation from plain English, real-time validation and generated diagrams. | Fast AI drafting of SysML v2 text with validation and diagrams, with nothing to install. | Goes past a valid model to an evaluated one: state machine simulation, budgets, Pareto trades and a 3D view from the same text. |
| SysModeler | Web | SysML v1 and v2 tool that generates model code from requirement documents with AI. SysML v2 support is in beta. | Generating a first-draft model from existing requirement documents. | Runs every AI draft through a compiler and repairs what fails, then evaluates each requirement with its value, limit and margin. |
| Valispace (Altium) | Web | Engineering platform with formula-linked properties and an AI assistant that suggests improvements to requirements. | Hardware requirements and formula-linked engineering parameters, now alongside Altium. | Puts the whole system in SysML v2 text that an AI can write, a compiler can check and git can diff. |
| Siemens Systems Modeler for SysML v2 | Web | SysML v2 modeler on Siemens Xcelerator, built with IBM Rhapsody technology, with APIs and completeness and correctness checks. | Programs already on Siemens Xcelerator that want web SysML v2 modeling in that ecosystem. | Self-serve from $39 a month, with an agent that writes the model and an MCP server for the agent you already use. |
| CATIA Magic / Cameo | Desktop | Mature MBSE suite with a SysML v2 text editor kept in sync with diagrams, and a SysML v2 simulation plugin. | Enterprise programs that need full SysML v2 coverage, mature tooling and the Dassault ecosystem. | Runs in a browser with nothing to install, one compiler for studio, agent and CI, and geometry derived from the text. |
Summarised from each vendor's public material, October 2026. "Best for" is our reading of where each tool is strongest. Products change quickly; tell us if a row is out of date.
Try it
See an evaluated SysML v2 model in a few minutes
Connect the agent you already use, or describe a system to the built-in one. MBEstudio compiles the SysML v2 model, checks it and evaluates every requirement with its value, limit and margin. See it in real Claude Code sessions, connect your agent, or see pricing.
FAQ
SysML v2 tool questions
Which SysML v2 tools are available in 2026?
Commercial options include CATIA Magic and Cameo, Ansys SAM, Siemens Systems Modeler, Innoslate, Dalus, SysGit, Flow Engineering, Syside, Visual Paradigm SysML v2 Studio, SysModeler, Valispace and MBEstudio. Eclipse SysON is open source. They differ most in where they run, how they use AI and whether they evaluate the model or only edit it.
Which SysML v2 tools run in a web browser?
Ansys SAM, Siemens Systems Modeler, Dalus, Eclipse SysON, Innoslate, Visual Paradigm SysML v2 Studio, SysModeler, Valispace, Flow Engineering and MBEstudio all run in a browser. CATIA Magic and Cameo are desktop applications, and Syside runs in VS Code.
Is there an open-source SysML v2 tool?
Yes. Eclipse SysON is an open-source web modeler for SysML v2 from Obeo and CEA. The OMG SysML v2 Pilot Implementation is also open source and is the reference for the language.
Which SysML v2 tools use AI?
Most new tools do. Visual Paradigm SysML v2 Studio and SysModeler generate SysML v2 from plain language or documents, Dalus and Flow Engineering have copilots and agents, SysGit uses agentic AI on the model, and MBEstudio's agent writes the model, runs it through a compiler and repairs what fails.
What is a browser-based alternative to Cameo for SysML v2?
Ansys SAM, Siemens Systems Modeler, Dalus, Eclipse SysON and MBEstudio all model SysML v2 in a browser. MBEstudio adds an AI agent and evaluates requirements against geometry, mass and power derived from the model.