OpenFOAM vs ngspice

OpenFOAM9.0Visit Nngspice8.3Visit

Higher score OpenFOAM #4 in Physics Simulation Software 9.0/10 Free plan Free plan✓ 2 of 6 features Visit OpenFOAM

vs

N ngspice #6 in Physics Simulation Software 8.3/10 Free plan Free plan✓ 0 of 6 features Visit ngspice

• OpenFOAM fits best

  Advanced computational fluid dynamics

• ngspice fits best

  Open-source circuit simulation developers

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Side by side

Feature	OpenFOAM 9.0/10 Visit ↗	Nngspice 8.3/10 Visit ↗
At a glance
Editor score	9.0	8.3
Ranking	#4 in Physics Simulation Software	#6 in Physics Simulation Software
Best for	Advanced computational fluid dynamics	Open-source circuit simulation developers
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted, Desktop	Self-hosted, Desktop
Platforms	Windows, macOS, Linux	Windows, macOS, Linux
Support	Community, Docs	Community, Docs, Tickets
Integrations	4 integrations	4 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features OpenFOAM 2/6 · ngspice 0/6
Lesson library	Not checked yet	Not checked yet
Authoring tools	Not checked yet	Not checked yet
Assessment tools	Not checked yet	Not checked yet
3D visuals	✓ (best)	Not checked yet
Offline access	Not checked yet	Not checked yet
Data export	✓ (best)	Not checked yet
Specs
Delivery mode	Desktop	Not checked yet
Our review
Pros	Turbulence, multiphase-flow, heat-transfer and fluid-flow solvers Native meshing plus MPI-based parallel simulation workflows ParaView visualization with VTK and EnSight export support	Advanced DC, AC, transient, noise, distortion, and sensitivity analyses Mixed-signal, Monte Carlo, Verilog-A, Verilog, and VHDL capabilities SPICE model compatibility plus KiCad, Verilator, GHDL, and OpenVAF integrations
Cons	Primarily focused on fluid simulation rather than broad physics domains Text-based case dictionaries require a technical configuration workflow Source-code extensibility may demand programming expertise	No built-in schematic entry Requires netlists or command files for simulation input Focused on electrical simulation rather than general physics
Our verdict	OpenFOAM is a freely available, open-source computational fluid dynamics toolbox for engineering, scientific research and education. It provides solvers and utilities for fluid flow, turbulence, multiphase flow, heat transfer, mesh… Read the review →	ngspice is a free, open-source SPICE-compatible simulator for analog, digital, and mixed-signal electrical circuits. It is aimed at developers and engineers who need detailed circuit analysis on Windows, macOS, or Linux, along with… Read the review →

Strengths and trade-offs

• OpenFOAM — where it wins

  • Turbulence, multiphase-flow, heat-transfer and fluid-flow solvers
  • Native meshing plus MPI-based parallel simulation workflows
  • ParaView visualization with VTK and EnSight export support

  Where it doesn't

  • Primarily focused on fluid simulation rather than broad physics domains
  • Text-based case dictionaries require a technical configuration workflow
  • Source-code extensibility may demand programming expertise

• ngspice — where it wins

  • Advanced DC, AC, transient, noise, distortion, and sensitivity analyses
  • Mixed-signal, Monte Carlo, Verilog-A, Verilog, and VHDL capabilities
  • SPICE model compatibility plus KiCad, Verilator, GHDL, and OpenVAF integrations

  Where it doesn't

  • No built-in schematic entry
  • Requires netlists or command files for simulation input
  • Focused on electrical simulation rather than general physics

• OpenFOAM9.0/10 · Free plan

  A free, extensible CFD toolbox for advanced fluid-flow simulation and research.

  Visit OpenFOAMFull verdict →
• Nngspice8.3/10 · Free plan

  A free, open-source simulator for advanced circuit analysis across desktop platforms and APIs.

  Visit ngspiceFull verdict →