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Head-to-head · Groundwater Modeling Software

FREEWAT vs Watershed Modeling System (WMS)

  • Updated Sep 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score FREEWAT #3 in Groundwater Modeling Software 8.2/10 Free plan Free plan✓ 3 of 3 features Visit FREEWAT
Watershed Modeling System (WMS) #4 in Groundwater Modeling Software 7.6/10 Free plan · paid from $3,990 Free plan✓ 3 of 3 features Visit Aquaveo

FREEWAT leads on 0 checks, Watershed Modeling System (WMS) on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFREEWAT · 8.2/10
  • Free planboth

FREEWAT scores higher on our rubric for groundwater modeling software: 8.2 against 7.6 out of 10; our editors rank them #3 and #4.

FREEWAT is the better fit for GIS-centered modeling and water-management workflows. Watershed Modeling System (WMS) is the better fit for watershed teams modeling surface-water interactions.

  • FREEWAT fits best

    GIS-centered modeling and water-management workflows

  • Watershed Modeling System (WMS) fits best

    Watershed teams modeling surface-water interactions

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature FREEWAT 8.2/10 Visit ↗ Watershed Modeling System (WMS) 7.6/10 Visit ↗
At a glance
Editor score 8.2 7.6
Ranking #3 in Groundwater Modeling Software #4 in Groundwater Modeling Software
Best for GIS-centered modeling and water-management workflows Watershed teams modeling surface-water interactions
Pricing model Free Free plan + paid
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows, Linux Windows
Support Community, Docs Phone, Email, Community, Docs
Integrations 8 integrations 7 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features FREEWAT 3/3 · Watershed Modeling System (WMS) 3/3
Transport modeling ✓ ✓
Surface-water coupling ✓ ✓
GIS data exchange ✓ ✓
Specs
Flow modeling method Not published Finite-difference
Model dimensions Not published 2d
Supported platforms Windows, Linux (macOS via Windows/Linux virtual machine) Windows
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.
  • Delineates watersheds and sub-basins from terrain data.
  • Connects GIS workflows with hydrologic and hydraulic modeling.
  • GSSHA supports 2D groundwater–surface-water interaction and contaminant modeling.
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.
  • Groundwater modeling is centered on integrated GSSHA, not standalone simulation.
  • Runs on Windows as desktop software.
  • Paid editions start at $3,990 one-time.
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 →

Watershed Modeling System (WMS) is Windows desktop software for building and analyzing watershed models. It is aimed at teams working across terrain and GIS data, watershed delineation, hydrology, hydraulics, and floodplain mapping.…

Read the review →
  1. FREEWATGroundwater Modeling Software 8.2Free plan
  2. Watershed Modeling System (WMS)Groundwater Modeling Software 7.6Free plan · paid from $3,990

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.

  • Watershed Modeling System (WMS) — where it wins

    • Delineates watersheds and sub-basins from terrain data.
    • Connects GIS workflows with hydrologic and hydraulic modeling.
    • GSSHA supports 2D groundwater–surface-water interaction and contaminant modeling.

    Where it doesn't

    • Groundwater modeling is centered on integrated GSSHA, not standalone simulation.
    • Runs on Windows as desktop software.
    • Paid editions start at $3,990 one-time.
  • FREEWAT8.2/10 · Free plan

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

    Visit FREEWATFull verdict →
  • Watershed Modeling System (WMS)7.6/10 · Free plan · paid from $3,990

    A broad watershed toolkit with groundwater interaction modeling, not a standalone groundwater simulator.

    Visit AquaveoFull verdict →

More comparisons

All groundwater modeling software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update