MuJoCo
MuJoCo: A specialized physics engine for robotics, biomechanics, graphics, and control research. Ranked #24 of 69 in Simulation Software by our editors (6.7/10); pricing: Free plan; best for teams modeling contact-rich rigid and soft-body dynamics.
At a glance
- Editor score6.7 / 10
- PricingFree plan
- Best forTeams modeling contact-rich rigid and soft-body dynamics
- Free planYes
- Paid fromFree
- Facts checked24 Sep 2026
Where it wins
- Simulates articulated structures, contacts, particles, cloth, rope, and soft objects
- Includes multiple actuators, solvers, and numerical integrators
- Offers a C API, Python bindings, MJCF, and native OpenGL visualization
Where it doesn't
- Its focus is simulation and dynamics, not a general-purpose robotics application
- Local model setup and solver choices require domain-specific expertise
- Support is through documentation and community channels
Our verdict on MuJoCo
MuJoCo is a free, open-source physics engine for research and development in robotics, biomechanics, graphics, animation, and machine learning. It is aimed at researchers and developers building local simulation and control applications, especially those working with articulated structures and contact-rich environments. Its capabilities also support model-based optimization, control synthesis, state estimation, system identification, and mechanism design, so it suits technical workflows rather than buyers seeking a hosted, ready-made business application.
The engine's breadth within dynamics is a defining strength. It handles generalized-coordinate dynamics and inverse dynamics with contacts, alongside soft contacts, limits, friction, equality constraints, and particle, cloth, rope, and soft-object simulation. Actuators include motors, cylinders, muscles, and tendons. Newton, conjugate-gradient, and projected Gauss-Seidel solvers, plus Euler and Runge-Kutta integrators, provide options for different simulation needs. MJCF XML and its built-in compiler support model definition; the product description also lists URDF model loading. Interactive visualization is available through native OpenGL, with multi-threaded sampling and finite-difference approximations among the additional capabilities.
MuJoCo is distributed as open-source software, with Windows, macOS, and Linux binaries and desktop or self-hosted deployment. A C API and Python bindings make it usable from code, and Python and Unity are listed as integrations. That combination should appeal to developers who want to build or connect simulation workflows across those environments without a priced hosted service. Documentation and community are the listed support channels. Choose MuJoCo for configurable dynamics and contact simulation; teams looking for a broader end-user product or a vendor-led support channel should consider alternatives.
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MuJoCo pricing
MuJoCo fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Discrete-event models | Not verified |
| System-dynamics models | Not verified |
| Agent-based models | Not verified |
| Finite-element analysis | Not verified |
| Multiphysics simulation | Not verified |
| Cloud deployment | Not verified |
| API access | Yes |
| Deployment | Desktop, Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Docs, Community |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 2 integrations: Python, Unity |
| Pricing | Free plan |
| Website | mujoco.org |
| Facts checked | 24 Sep 2026 |
MuJoCo integrations
MuJoCo lists 2 integrations on its own site.
- Python
- Unity
Alternatives to MuJoCo
- SimulinkA broad engineering simulation environment for modeling, verification, and code generation.9.4
- COMSOL MultiphysicsA desktop environment for coupled physics models, engineering studies, and custom simulation apps.9.3
- Ansys FluentA broad CFD toolkit for engineering teams that need advanced physics and scalable solving.9.2
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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