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Maps · head to head

GRASS GIS vs Mapillary

GRASS GIS logo

GRASS GIS

Maps

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

From
Free
Rated
-
Full reviewWebsite
Mapillary logo

Mapillary

Maps

Platform for street-level imagery that crowdsources images to map the world and

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.; Mapillary no pricing information published on main website pages, suggesting either free service or hidden pricing model
  • They diverge on capability: GRASS GIS covers Raster analysis, Mapillary 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 Mapillary actually diverge.

Attributes where GRASS GIS and Mapillary differ
AttributeGRASS GISMapillary
Starting priceFreeOn request
Pricing modelOpen source, no licence feefreemium
Free tierYesNo
PlatformsLinux, Windows, macOSWeb

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 Mapillary

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

Mapillary

  • Street-level imagery for map editing and verificationnot GRASS GIS
  • Crowdsourcing photos to keep a map currentnot GRASS GIS
  • Extracting map features automatically with computer visionnot GRASS GIS
  • Embedding street imagery with MapillaryJSnot 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.

Mapillary

  • No pricing information published on main website pages, suggesting either free service or hidden pricing model
  • Unclear monetization strategy makes it difficult for businesses to understand licensing costs for commercial use
  • No published tier structure or feature limits visible to potential customers

Pricing, plan by plan

GRASS GIS

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

Mapillary

On request

No published plan breakdown. See the Mapillary 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 Mapillary if

  • You need core functionality.
  • You also want user interface.
Mapillary review

Questions people ask

Is GRASS GIS or Mapillary better?
Neither clearly leads. GRASS GIS starts at Free and Mapillary at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GRASS GIS or Mapillary?
GRASS GIS has a free tier; the other does not. Paid plans start at Free for GRASS GIS and On request for Mapillary.
Does GRASS GIS or Mapillary run on more platforms?
GRASS GIS runs on Linux, Windows, macOS. Mapillary runs on Web.
Can I use GRASS GIS for free?
Yes. GRASS GIS has a free tier, so you can try it without paying. Mapillary 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 Mapillary is typically brought in for.
What can GRASS GIS do that Mapillary cannot?
GRASS GIS covers Raster analysis, Hydrological modelling, Terrain analysis, Vector topology. Mapillary 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.

Mapillary: What is the pricing model for Mapillary?

Mapillary does not publish pricing information on its main website pages. The platform focuses on features like street-level imagery access, map updating through computer vision, and open data sharing, but specific costs and licensing tiers are not disclosed publicly.

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.

Mapillary: Can I use Mapillary for commercial purposes?

Specific details about commercial licensing for Mapillary are not published on the main website. Interested businesses should contact Mapillary directly through their support channels to discuss commercial use cases and licensing options.

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

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

Mapillary: Is Mapillary free to use for individual contributors?

Mapillary emphasizes open data sharing and community contributions but specific details about free vs. paid access for individuals are not clearly stated on the main website. Contact Mapillary support for clarification on access terms.

Source
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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