COMSOL Multiphysics vs ngspice

COMSOL Multiphysics9.4Visit Nngspice8.3Visit

Higher score COMSOL Multiphysics #1 in Physics Simulation Software 9.4/10 Pricing on request ✓ 5 of 6 features Visit COMSOL

vs

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

• COMSOL Multiphysics fits best

  Engineering multiphysics and industrial modeling

• ngspice fits best

  Open-source circuit simulation developers

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Side by side

Feature	COMSOL Multiphysics 9.4/10 Visit ↗	Nngspice 8.3/10 Visit ↗
At a glance
Editor score	9.4	8.3
Ranking	#1 in Physics Simulation Software	#6 in Physics Simulation Software
Best for	Engineering multiphysics and industrial modeling	Open-source circuit simulation developers
Pricing model	Paid	Free
Starting price	Pricing on request	Free plan
Free plan	—	✓ (best)
Free trial	—	—
Deployment	Desktop, Self-hosted	Self-hosted, Desktop
Platforms	Windows, macOS, Linux	Windows, macOS, Linux
Support	Email, Phone, Docs	Community, Docs, Tickets
Integrations	9 integrations	4 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features COMSOL Multiphysics 5/6 · ngspice 0/6
Lesson library	✓ (best)	Not checked yet
Authoring tools	✓ (best)	Not checked yet
Assessment tools	Not checked yet	Not checked yet
3D visuals	✓ (best)	Not checked yet
Offline access	✓ (best)	Not checked yet
Data export	✓ (best)	Not checked yet
Specs
Delivery mode	Desktop	Not checked yet
Our review
Pros	Covers coupled and single-physics engineering simulations Connects with major CAD, MATLAB, Simulink, and Excel tools Supports custom apps, model management, optimization, and data export	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	Pricing requires contacting sales No free plan is available The core product is desktop software rather than browser-based	No built-in schematic entry Requires netlists or command files for simulation input Focused on electrical simulation rather than general physics
Our verdict	COMSOL Multiphysics is an integrated desktop environment for creating, solving, visualizing, and evaluating physics-based models. It is designed for engineers, researchers, manufacturers, technical enterprises, laboratories, and… 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

• COMSOL Multiphysics — where it wins

  • Covers coupled and single-physics engineering simulations
  • Connects with major CAD, MATLAB, Simulink, and Excel tools
  • Supports custom apps, model management, optimization, and data export

  Where it doesn't

  • Pricing requires contacting sales
  • No free plan is available
  • The core product is desktop software rather than browser-based

• 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

• COMSOL Multiphysics9.4/10 · Pricing on request

  A broad desktop environment for coupled physics, engineering models, and custom simulation apps.

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

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

  Visit ngspiceFull verdict →