Altair nanoFluidX vs CFD++

Altair nanoFluidX—Visit CFD++—Visit

Altair nanoFluidX #4 in CFD software —/10 Pricing on request ✓ 3 of 3 features Visit Altair

vs

CFD++ #6 in CFD software —/10 Pricing on request ✓ 1 of 3 features Visit Metacomp

• Altair nanoFluidX fits best

  GPU-focused free-surface and multiphase simulation

• CFD++ fits best

  Enterprise teams needing broad CFD and HPC

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Side by side

Feature	Altair nanoFluidX —/10 Visit ↗	CFD++ —/10 Visit ↗
At a glance
Editor score	—	—
Ranking	#4 in CFD software	#6 in CFD software
Best for	GPU-focused free-surface and multiphase simulation	Enterprise teams needing broad CFD and HPC
Pricing model	Paid	Paid
Starting price	Not published	Not published
Free plan	Not published	Not published
Free trial	—	—
Deployment	Desktop	Cloud, Self-hosted
Platforms	Windows, Linux	Windows, Linux, Web
Support	Docs	Email
Integrations	3 integrations	4 integrations
Built for	Mid-market, Enterprise	Mid-market, Enterprise
Features Altair nanoFluidX 3/3 · CFD++ 1/3
Multiphysics solver	✓	✓
Built-in meshing	✓ (best)	Not published
CAD import	✓ (best)	Not published
Specs
Deployment	Desktop	Hybrid
Parallel cores	Not published	Not published
Operating systems	Windows 11; RHEL/CIQ Rocky Linux 9.4	Windows, Linux, Unix
Our review
Pros	Multi-GPU execution for demanding SPH flow simulations Models free surfaces, surface tension, and multiphase flows Supports fluid–structure interaction and thermal energy equations	Models steady and transient, single-phase and multiphase flows Supports combustion, heat transfer, radiation and moving meshes Scales across multiple cores and HPC systems
Cons	Requires CUDA-enabled NVIDIA GPUs for GPU execution Narrower scope than broad general-purpose CFD suites Licensing uses Altair Units consumed per GPU job	Pricing is handled through contact sales Geometry preparation and mesh generation are separate products Cloud CFD++ is pay-per-use
Our verdict	Altair nanoFluidX is a desktop computational-fluid-dynamics solver built around a weakly compressible Smoothed Particle Hydrodynamics formulation. It targets engineering teams that need GPU-focused simulation of single- and multiphase… Read the review →	CFD++ is a general-purpose computational fluid dynamics suite for engineers and research organizations working with complex flow problems. It covers steady and transient, internal and external flows, including compressible and… Read the review →

Strengths and trade-offs

• Altair nanoFluidX — where it wins

  • Multi-GPU execution for demanding SPH flow simulations
  • Models free surfaces, surface tension, and multiphase flows
  • Supports fluid–structure interaction and thermal energy equations

  Where it doesn't

  • Requires CUDA-enabled NVIDIA GPUs for GPU execution
  • Narrower scope than broad general-purpose CFD suites
  • Licensing uses Altair Units consumed per GPU job

• CFD++ — where it wins

  • Models steady and transient, single-phase and multiphase flows
  • Supports combustion, heat transfer, radiation and moving meshes
  • Scales across multiple cores and HPC systems

  Where it doesn't

  • Pricing is handled through contact sales
  • Geometry preparation and mesh generation are separate products
  • Cloud CFD++ is pay-per-use

• Altair nanoFluidX—/10 · Pricing on request

  A focused GPU SPH solver for free-surface and multiphase CFD workflows.

  Visit AltairFull verdict →
• CFD++—/10 · Pricing on request

  Broad CFD and parallel HPC capabilities for complex engineering and research workloads.

  Visit MetacompFull verdict →