Altair nanoFluidX vs HELYX

Altair nanoFluidX—Visit HELYX—Visit

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

vs

HELYX #7 in CFD software —/10 Pricing on request ✓ 2 of 3 features Contact ENGYS

• Altair nanoFluidX fits best

  GPU-focused free-surface and multiphase simulation

• HELYX fits best

  Teams wanting flexible OpenFOAM-based CFD

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Side by side

Feature	Altair nanoFluidX —/10 Visit ↗	HELYX —/10 Visit ↗
At a glance
Editor score	—	—
Ranking	#4 in CFD software	#7 in CFD software
Best for	GPU-focused free-surface and multiphase simulation	Teams wanting flexible OpenFOAM-based CFD
Pricing model	Paid	Paid
Starting price	Not published	Not published
Free plan	Not published	—
Free trial	—	—
Deployment	Desktop	Cloud, Self-hosted
Platforms	Windows, Linux	Windows, Linux
Support	Docs	Email
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Altair nanoFluidX 3/3 · HELYX 2/3
Multiphysics solver	✓	✓
Built-in meshing	✓	✓
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	Linux, Windows
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	Covers compressible and incompressible flows, turbulence, and multiphase simulation Includes mesh generation, moving meshes, and conjugate heat transfer Client-server operation supports local, remote, and cloud computing
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	The HELYX package is commercial, despite its open-source HELYX-Core engine Pricing requires contacting ENGYS rather than choosing a published plan The listed desktop operating systems are limited to Windows and Linux
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 →	HELYX is a general-purpose computational fluid dynamics package from ENGYS, combining a graphical interface with HELYX-Core, an open-source simulation engine, for finite-volume engineering analysis. Its scope suits engineering teams 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

• HELYX — where it wins

  • Covers compressible and incompressible flows, turbulence, and multiphase simulation
  • Includes mesh generation, moving meshes, and conjugate heat transfer
  • Client-server operation supports local, remote, and cloud computing

  Where it doesn't

  • The HELYX package is commercial, despite its open-source HELYX-Core engine
  • Pricing requires contacting ENGYS rather than choosing a published plan
  • The listed desktop operating systems are limited to Windows and Linux

• Altair nanoFluidX—/10 · Pricing on request

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

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

  A commercial OpenFOAM-based CFD package with meshing and broad flow-simulation capabilities.

  Contact ENGYSFull verdict →