Softwr

Maps · head to head

GRASS GIS vs QGIS

GRASS GIS logo

GRASS GIS

Maps

Long-running open source geospatial analysis engine for raster, vector and terrain processing

From
Free
Rated
-
Full reviewWebsite
Q

QGIS

Maps

Free, open-source desktop GIS application that supports viewing, editing, and analysis of

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only GRASS GIS has a free tier, so it costs nothing to try first.
  • Each has a real cost: GRASS GIS the location and mapset data model requires importing data into a structured database with a fixed coordinate system before analysis, which is a real barrier for anyone used to opening files directly.; QGIS requires technical knowledge to use effectively for advanced GIS analysis
  • They diverge on capability: GRASS GIS covers Raster analysis, QGIS covers Core Functionality.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which GRASS GIS and QGIS actually diverge.

Attributes where GRASS GIS and QGIS differ
AttributeGRASS GISQGIS
Starting priceFreeOn request
Pricing modelOpen source, no licence feefreemium
Free tierYesNo
PlatformsLinux, Windows, macOSWindows, macOS, Linux

Identical on both: user rating (Not yet rated), category (Maps).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in GRASS GIS

  • Raster analysis
  • Hydrological modelling
  • Terrain analysis
  • Vector topology
  • Temporal framework
  • Image processing
  • Python API
  • QGIS integration

Only in QGIS

  • Core Functionality
  • User Interface

What people use each for

The jobs each tool is most often brought in to do.

GRASS GIS

  • A hydrologist delineating watersheds and modelling flow accumulation over a large digital elevation modelnot QGIS
  • A research group building a reproducible time series analysis of satellite imagery that must be rerunnable years laternot QGIS
  • An environmental agency running viewshed and solar radiation analysis for planning assessments without buying commercial GIS seatsnot QGIS
  • A QGIS user who needs a specific processing algorithm that only exists in the GRASS toolboxnot QGIS

QGIS

  • Creating thematic maps showing population density by regionnot GRASS GIS
  • Digitizing building footprints from satellite imagery for urban planningnot GRASS GIS
  • Analyzing proximity of retail stores to competitor locationsnot GRASS GIS
  • Performing spatial analysis of wildlife habitat suitabilitynot GRASS GIS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

GRASS GIS

  • The location and mapset data model requires importing data into a structured database with a fixed coordinate system before analysis, which is a real barrier for anyone used to opening files directly.
  • The native graphical interface is dated and inconsistent compared with QGIS or ArcGIS, so most users end up running GRASS through QGIS and never learn the tool they are actually depending on.
  • There is no vendor, so contractual support, service levels and liability do not exist by default and must be arranged with an independent consultancy that may not cover your jurisdiction.
  • Cartographic output and map layout are weak relative to the analysis capability, meaning a second tool is always needed to produce a publishable map.
  • Module naming and argument conventions are idiosyncratic and long-standing, so scripts are durable but the learning curve is steep and transferable skills from other GIS packages help less than expected.

QGIS

  • Requires technical knowledge to use effectively for advanced GIS analysis
  • Desktop application does not include built-in web publishing capabilities

Pricing, plan by plan

GRASS GIS

Free
  • GRASS GISFree
    • GNU GPL licence
    • All modules included
    • No user or seat limits

QGIS

On request

No published plan breakdown. See the QGIS review.

Which should you pick?

Choose GRASS GIS if

  • You need raster analysis.
  • You want to start without paying.
  • You work on Linux, Windows, macOS.
  • You also want hydrological modelling.
GRASS GIS review

Choose QGIS if

  • You need core functionality.
  • You work on Windows, macOS, Linux.
  • You also want user interface.
QGIS review

Questions people ask

Is GRASS GIS or QGIS better?
Neither clearly leads. GRASS GIS starts at Free and QGIS at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GRASS GIS or QGIS?
GRASS GIS has a free tier; the other does not. Paid plans start at Free for GRASS GIS and On request for QGIS.
Does GRASS GIS or QGIS run on more platforms?
GRASS GIS runs on Linux, Windows, macOS. QGIS runs on Windows, macOS, Linux.
Can I use GRASS GIS for free?
Yes. GRASS GIS has a free tier, so you can try it without paying. QGIS starts at On request.
What is GRASS GIS best used for?
GRASS GIS is most often used for a hydrologist delineating watersheds and modelling flow accumulation over a large digital elevation model, a research group building a reproducible time series analysis of satellite imagery that must be rerunnable years later, an environmental agency running viewshed and solar radiation analysis for planning assessments without buying commercial gis seats, a qgis user who needs a specific processing algorithm that only exists in the grass toolbox. Of those, a hydrologist delineating watersheds and modelling flow accumulation over a large digital elevation model and a research group building a reproducible time series analysis of satellite imagery that must be rerunnable years later are not what QGIS is typically brought in for.
What can GRASS GIS do that QGIS cannot?
GRASS GIS covers Raster analysis, Hydrological modelling, Terrain analysis, Vector topology. QGIS covers Core Functionality, User Interface.

Answered from the vendors’ own pages

GRASS GIS: Who maintains GRASS GIS?

An international volunteer and academic developer community under the Open Source Geospatial Foundation. It originated at the US Army Construction Engineering Research Laboratory in 1982.

QGIS: Is QGIS free and open source?

Yes. QGIS is free and open-source software, licensed under the GNU General Public License, available for download and modification by anyone.

Source
GRASS GIS: Can I buy commercial support?

Not from a vendor. Independent consultancies in the OSGeo ecosystem offer paid support and development, and availability varies by region.

QGIS: What operating systems does QGIS support?

QGIS runs on Windows, macOS, and Linux, with installers available for each platform.

Source
GRASS GIS: Do I need to use its interface?

No. Most people run GRASS algorithms through the QGIS processing toolbox or from Python.

GRASS GIS: Is it suitable for production use?

Yes for analysis pipelines, and it is used by agencies and research institutions. Plan for community support rather than a service level agreement.

Share

Related pages

More on GRASS GIS

More on QGIS

Keep looking

Other head to heads