MODFLOW 6 vs PFLOTRAN

MODFLOW 69.3Visit PFLOTRAN8.0Visit

Higher score MODFLOW 6 #1 in Groundwater Modeling Software 9.3/10 Free plan Free plan✓ 2 of 3 features Visit USGS

vs

PFLOTRAN #5 in Groundwater Modeling Software 8.0/10 Open source ✓ 1 of 3 features Visit PFLOTRAN

• MODFLOW 6 fits best

  Broad groundwater-flow and coupled-transport modeling

• PFLOTRAN fits best

  Large-scale reactive transport and fractured media

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Side by side

Feature	MODFLOW 6 9.3/10 Visit ↗	PFLOTRAN 8.0/10 Visit ↗
At a glance
Editor score	9.3	8.0
Ranking	#1 in Groundwater Modeling Software	#5 in Groundwater Modeling Software
Best for	Broad groundwater-flow and coupled-transport modeling	Large-scale reactive transport and fractured media
Pricing model	Free	Free
Starting price	Free plan	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Platforms	Windows, Linux, macOS	Linux
Support	Email	Docs
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features MODFLOW 6 2/3 · PFLOTRAN 1/3
Transport modeling	✓	✓
Surface-water coupling	✓ (best)	Not checked yet
GIS data exchange	Not checked yet	Not checked yet
Specs
Flow modeling method	Finite-difference	Other
Model dimensions	3d	3d
Supported platforms	Not checked yet	Linux
Our review
Pros	Models 3D transient groundwater flow, solute transport, and thermal transport Couples multiple models, including groundwater and surface-water flow Supports regular and unstructured grids on Windows, Linux, and macOS	Combines groundwater flow with reactive transport and geochemical reactions Parallel execution supports large-scale scientific simulations Models both porous and fractured subsurface media
Cons	Self-hosted deployment requires users to manage their own environment No AI features are included Email is the listed support channel	Linux is the only listed platform Self-hosted deployment requires managing the computing environment Documentation is the listed support channel
Our verdict	MODFLOW 6 is an object-oriented hydrologic simulation program developed by the U.S. Geological Survey. It is intended for groundwater modelers, including academics, consultants, and government scientists, who need to represent… Read the review →	PFLOTRAN is an open-source simulation code for subsurface groundwater flow and reactive transport. It is aimed at researchers and technical teams constructing numerical models of groundwater movement, dissolved chemical species, and… Read the review →

Strengths and trade-offs

• MODFLOW 6 — where it wins

  • Models 3D transient groundwater flow, solute transport, and thermal transport
  • Couples multiple models, including groundwater and surface-water flow
  • Supports regular and unstructured grids on Windows, Linux, and macOS

  Where it doesn't

  • Self-hosted deployment requires users to manage their own environment
  • No AI features are included
  • Email is the listed support channel

• PFLOTRAN — where it wins

  • Combines groundwater flow with reactive transport and geochemical reactions
  • Parallel execution supports large-scale scientific simulations
  • Models both porous and fractured subsurface media

  Where it doesn't

  • Linux is the only listed platform
  • Self-hosted deployment requires managing the computing environment
  • Documentation is the listed support channel

• MODFLOW 69.3/10 · Free plan

  A free, open-source model for 3D groundwater flow, transport, and coupled simulations.

  Visit USGSFull verdict →
• PFLOTRAN8.0/10 · Open source

  A parallel, open-source engine for large 3D groundwater and geochemical simulations.

  Visit PFLOTRANFull verdict →