FREEWAT vs MODFLOW-USG

FREEWAT8.7Visit MODFLOW-USG7.8Visit

Higher score FREEWAT #2 in Groundwater Modeling Software 8.7/10 Free plan Free plan✓ 3 of 3 features Visit FREEWAT

vs

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

• FREEWAT fits best

  GIS-centered modeling and water-management workflows

• MODFLOW-USG fits best

  Unstructured grids and complex well or conduit systems

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Side by side

Feature	FREEWAT 8.7/10 Visit ↗	MODFLOW-USG 7.8/10 Visit ↗
At a glance
Editor score	8.7	7.8
Ranking	#2 in Groundwater Modeling Software	#6 in Groundwater Modeling Software
Best for	GIS-centered modeling and water-management workflows	Unstructured grids and complex well or conduit systems
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Desktop	Self-hosted
Support	Community, Docs	Email
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features FREEWAT 3/3 · MODFLOW-USG 0/3
Transport modeling	✓ (best)	Not checked yet
Surface-water coupling	✓ (best)	Not checked yet
GIS data exchange	✓ (best)	Not checked yet
Specs
Flow modeling method	Not checked yet	Finite-difference
Model dimensions	Not checked yet	Not checked yet
Supported platforms	Windows, Linux (macOS via Windows/Linux virtual machine)	Not checked yet
Our review
Pros	Combines MODFLOW-family flow modeling with solute and density-dependent transport. Connects groundwater and surface-water interaction modeling with QGIS. Includes calibration, sensitivity analysis and water-management planning tools.	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	The current plugin is installable on Windows and Linux only. Its workflow is delivered through the QGIS desktop GIS plugin. Support channels are community and documentation.	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	FREEWAT is a free, open-source modeling environment delivered as a plugin for the QGIS desktop GIS. It is intended for engineering and geoenvironmental companies, water and river-basin authorities, environmental agencies, universities, and… 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

• FREEWAT — where it wins

  • Combines MODFLOW-family flow modeling with solute and density-dependent transport.
  • Connects groundwater and surface-water interaction modeling with QGIS.
  • Includes calibration, sensitivity analysis and water-management planning tools.

  Where it doesn't

  • The current plugin is installable on Windows and Linux only.
  • Its workflow is delivered through the QGIS desktop GIS plugin.
  • Support channels are community and documentation.

• 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

• FREEWAT8.7/10 · Free plan

  A free, GIS-centered modeling environment spanning groundwater simulation, analysis and planning.

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

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

  Visit USGSFull verdict →