Serpent
Serpent: Specialized, Linux-only Monte Carlo simulation for nuclear transport and reactor-physics studies. Ranked #48 of 69 in Simulation Software by our editors (4.3/10); pricing: Pricing on request; best for nuclear researchers modeling neutron transport.
At a glance
- Editor score4.3 / 10
- PricingPricing on request
- Best forNuclear researchers modeling neutron transport
- Cloud deploymentNo
- Founded2004 · Espoo, Finland
- Facts checked24 Sep 2026
Where it wins
- Continuous-energy neutron and photon transport calculations
- Criticality, burnup and depletion analysis in one code
- Multiphysics coupling and variance-reduction methods
Where it doesn't
- Linux-only deployment limits platform flexibility
- Self-hosted, command-line workflows require local technical setup
- Licensing is handled through VTT with contact-sales access
Our verdict on Serpent
Serpent is a continuous-energy Monte Carlo code from VTT Technical Research Centre of Finland Ltd for reactor-physics and radiation-transport analysis. It is aimed at universities, research institutes, national laboratories and nuclear-industry organizations modeling neutron and photon behavior. Core capabilities include criticality and eigenvalue calculations, burnup and depletion analysis, automated geometry and material modeling through input files, and variance-reduction methods. The product is self-hosted and operated through locally installed, command-line workflows on Linux.
Licensing and availability are handled by VTT, with a contact-sales pricing model rather than published plan tiers. That sales-led approach fits research groups and enterprise teams that need to evaluate deployment and licensing with the vendor before adoption. Setup centers on preparing input files for geometry, materials and simulation parameters, so organizations should expect technical onboarding around model construction and local execution. Documentation and email are the listed support channels, providing a direct path for implementation questions.
Serpent’s strongest differentiator is its transport focus combined with coupling interfaces for multiphysics and external simulations. Teams can connect transport calculations with other physics codes, while API access supports integration into broader computational workflows. This makes it a strong candidate for nuclear researchers who need detailed neutron or photon transport, criticality studies or depletion modeling within self-managed infrastructure. Organizations seeking cloud deployment, graphical low-code modeling, Windows or macOS support, or general-purpose discrete-event, system-dynamics or agent-based simulation should consider a different tool. Serpent is most appropriate when specialized reactor-physics depth matters more than broad simulation-method coverage.
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Serpent pricing
Serpent fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Discrete-event models | No |
| System-dynamics models | No |
| Agent-based models | No |
| Finite-element analysis | No |
| Multiphysics simulation | Yes |
| Cloud deployment | No |
| API access | Yes |
| Deployment | Self-hosted |
| Platforms | Linux |
| Support | Docs, Email |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Pricing | Pricing on request |
| Website | serpent.vtt.fi |
| Facts checked | 24 Sep 2026 |
Alternatives to Serpent
- 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
See all Serpent alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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