MODFLOW 6 vs MODFLOW-USG

MODFLOW 69.3Visit MODFLOW-USG7.8Visit

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

vs

MODFLOW-USG #6 in Groundwater Modeling Software 7.8/10 Free plan Free plan✓ 0 of 3 features Visit USGS

• MODFLOW 6 fits best

  Broad groundwater-flow and coupled-transport modeling

• MODFLOW-USG fits best

  Unstructured grids and complex well or conduit systems

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Side by side

Feature	MODFLOW 6 9.3/10 Visit ↗	MODFLOW-USG 7.8/10 Visit ↗
At a glance
Editor score	9.3	7.8
Ranking	#1 in Groundwater Modeling Software	#6 in Groundwater Modeling Software
Best for	Broad groundwater-flow and coupled-transport modeling	Unstructured grids and complex well or conduit systems
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Support	Email	Email
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features MODFLOW 6 2/3 · MODFLOW-USG 0/3
Transport modeling	✓ (best)	Not checked yet
Surface-water coupling	✓ (best)	Not checked yet
GIS data exchange	Not checked yet	Not checked yet
Specs
Flow modeling method	Finite-difference	Finite-difference
Model dimensions	3d	Not checked yet
Supported platforms	Not checked yet	Not checked yet
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	Handles structured, unstructured, nested, and multi-shape grids Models arbitrary cell connectivity with Ghost Node Correction Represents multi-node wells, karst conduits, tile drains, and networks
Cons	Self-hosted deployment requires users to manage their own environment No AI features are included Email is the listed support channel	Self-hosted deployment requires local installation and management Support is provided through email rather than broader channels Flow-focused scope suits fewer transport and surface-water workflows
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 →	MODFLOW-USG is a USGS groundwater-flow model for teams working with structured or unstructured grids, nested layouts, multiple cell shapes, and complex subsurface connections. Its control-volume finite-difference formulation allows each… 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

• MODFLOW-USG — where it wins

  • Handles structured, unstructured, nested, and multi-shape grids
  • Models arbitrary cell connectivity with Ghost Node Correction
  • Represents multi-node wells, karst conduits, tile drains, and networks

  Where it doesn't

  • Self-hosted deployment requires local installation and management
  • Support is provided through email rather than broader channels
  • Flow-focused scope suits fewer transport and surface-water workflows

• MODFLOW 69.3/10 · Free plan

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

  Visit USGSFull verdict →
• MODFLOW-USG7.8/10 · Free plan

  A free, self-hosted MODFLOW variant for irregular grids and specialized groundwater systems.

  Visit USGSFull verdict →