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Maps · head to head

Global Mapper vs GRASS GIS

Global Mapper logo

Global Mapper

Maps

A GIS and lidar desktop that still sells a genuine perpetual licence with published prices

From
$700/one-time
Rated
-
Full reviewWebsite
GRASS GIS logo

GRASS GIS

Maps

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

From
Free
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: Global Mapper it is Windows only with no macOS or Linux build, so mixed-platform teams end up running a virtual machine and lose graphics performance on large point clouds; 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.
  • They diverge on capability: Global Mapper covers Format breadth, GRASS GIS covers Raster analysis.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Global Mapper and GRASS GIS actually diverge.

Attributes where Global Mapper and GRASS GIS differ
AttributeGlobal MapperGRASS GIS
Starting price$700/one-timeFree
Pricing modelOne-time purchaseOpen source, no licence fee
Free tierNoYes
PlatformsWindowsLinux, Windows, macOS

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 Global Mapper

  • Format breadth
  • Lidar processing
  • Pixels to Points
  • Coordinate transformation
  • Scripting
  • Mobile companion

Only in GRASS GIS

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

Both cover

  • Terrain analysis

What people use each for

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

Global Mapper

  • A survey office that receives lidar in a different format from every client and needs reliable conversion without writing scriptsnot GRASS GIS
  • A consultancy that wants to classify ground points and extract building footprints from a drone survey without an Esri enterprise agreementnot GRASS GIS
  • An organisation with an irregular workload that wants to buy the licence outright and skip maintenance in quiet yearsnot GRASS GIS
  • A geologist producing volumes, contours and cross sections from terrain data on a standalone office workstationnot GRASS GIS

GRASS GIS

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

Where each one falls short

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

Global Mapper

  • It is Windows only with no macOS or Linux build, so mixed-platform teams end up running a virtual machine and lose graphics performance on large point clouds
  • The interface has grown by accretion over two decades and features are scattered across menus, so new users are slow to find capabilities that are already installed
  • Node-locked perpetual licences are tied to the machine identifier, so a hardware refresh or a failed workstation means a support request rather than a login on a new device
  • Multi-user and web publishing are weak relative to Esri or QGIS with a server stack, so it is a desktop analysis tool and not a platform for sharing data across an organisation
  • Published prices apply to North America and differ elsewhere, so buyers outside that market must go through a reseller and cannot rely on the listed figures for budgeting

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.

Pricing, plan by plan

Global Mapper

$700/one-time
  • Global Mapper Standard, node-locked$700/one-time
    • Perpetual licence tied to one machine
    • First year of maintenance and support included
    • Renewal 245 USD per year, optional
  • Global Mapper Standard, floating or dongle$1050/one-time
    • Shared between users or carried on a USB dongle
    • Maintenance renewal 365 USD per year
    • Network licence 2,100 USD with a two-seat minimum
  • Global Mapper Pro, node-locked$1750/one-time
    • Adds lidar classification, feature extraction and Pixels to Points
    • Maintenance renewal 610 USD per year
    • Upgrade from Standard version 26 costs 1,050 USD
  • Global Mapper Pro, floating or dongle$2625/one-time
    • Shared or dongle licence
    • Maintenance renewal 915 USD per year
    • Network licence 5,250 USD with a two-seat minimum

GRASS GIS

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

Which should you pick?

Choose Global Mapper if

  • You need format breadth.
  • You work on Windows.
  • You also want lidar processing.
Global Mapper review

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

Questions people ask

Is Global Mapper or GRASS GIS better?
Neither clearly leads. Global Mapper starts at $700/one-time and GRASS GIS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Global Mapper or GRASS GIS?
GRASS GIS has a free tier; the other does not. Paid plans start at $700/one-time for Global Mapper and Free for GRASS GIS.
Does Global Mapper or GRASS GIS run on more platforms?
Global Mapper runs on Windows. GRASS GIS runs on Linux, Windows, macOS.
Can I use GRASS GIS for free?
Yes. GRASS GIS has a free tier, so you can try it without paying. Global Mapper starts at $700/one-time.
What is Global Mapper best used for?
Global Mapper is most often used for a survey office that receives lidar in a different format from every client and needs reliable conversion without writing scripts, a consultancy that wants to classify ground points and extract building footprints from a drone survey without an esri enterprise agreement, an organisation with an irregular workload that wants to buy the licence outright and skip maintenance in quiet years, a geologist producing volumes, contours and cross sections from terrain data on a standalone office workstation. Of those, a survey office that receives lidar in a different format from every client and needs reliable conversion without writing scripts and a consultancy that wants to classify ground points and extract building footprints from a drone survey without an esri enterprise agreement are not what GRASS GIS is typically brought in for.
What can Global Mapper do that GRASS GIS cannot?
Global Mapper covers Format breadth, Lidar processing, Pixels to Points, Coordinate transformation. GRASS GIS covers Raster analysis, Hydrological modelling, Vector topology, Temporal framework. Both handle Terrain analysis.

Answered from the vendors’ own pages

Global Mapper: Is there still a perpetual licence?

Yes. Blue Marble sells perpetual node-locked, floating, dongle and network licences that keep working after maintenance lapses.

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.

Global Mapper: What is the difference between Standard and Pro?

Pro is an add-on to a matching Standard licence and carries the lidar classification, feature extraction, Pixels to Points photogrammetry and advanced terrain tools.

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.

Global Mapper: Do I have to pay maintenance?

Only for the first year, which is included. After that it is optional; without it the software continues to run but you receive no upgrades or support.

GRASS GIS: Do I need to use its interface?

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

Global Mapper: Can it replace ArcGIS?

For desktop format conversion, lidar and terrain analysis, often yes. For enterprise data management, web services and organisation-wide sharing, no.

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.

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