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Maps · head to head

GRASS GIS vs PositionStack

GRASS GIS logo

GRASS GIS

Maps

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

From
Free
Rated
-
Full reviewWebsite
PositionStack logo

PositionStack

Maps

Free, developer-friendly geocoding API for forward and reverse geocoding with global coverage

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.; PositionStack the free plan allows only 100 requests per month
  • They diverge on capability: GRASS GIS covers Raster analysis, PositionStack 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 PositionStack actually diverge.

Attributes where GRASS GIS and PositionStack differ
AttributeGRASS GISPositionStack
Starting priceFreeOn request
Pricing modelOpen source, no licence feeUnknown
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 PositionStack

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

PositionStack

  • Forward geocoding addresses to coordinates via REST APInot GRASS GIS
  • Reverse geocoding coordinates to addressesnot GRASS GIS
  • Batch geocoding location data in a backend servicenot 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.

PositionStack

  • The free plan allows only 100 requests per month
  • The free plan is a personal licence, so commercial use requires a paid plan
  • The free plan is rate limited, with an extended rate limit only from the Basic plan up
  • Requests beyond the monthly quota are billed as overage, at $0.0003996 per request on Basic
  • The lowest advertised rates require annual prepayment
  • Enterprise volumes are priced by quote with no published rate

Pricing, plan by plan

GRASS GIS

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

PositionStack

On request

No published plan breakdown. See the PositionStack 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 PositionStack if

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

Questions people ask

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

PositionStack: What annual billing discount does Positionstack offer?

Annual billing provides up to 15% discount compared to monthly billing total. For example, Basic annual is $8.99/month vs $9.99/month monthly, and Professional annual is $43.99/month vs $49.99/month monthly. Source: https://positionstack.com/pricing

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.

PositionStack: How do Positionstack overage notifications work?

Positionstack sends alerts at 75%, 90%, and 100% of your monthly request allowance. Overages are calculated at month-end and charged according to each tier's per-request rate (e.g., Business tier: $0.00013332/request). Source: https://positionstack.com/pricing

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

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

PositionStack: What payment methods does Positionstack accept?

Positionstack accepts Visa, MasterCard, Discover, American Express, Diner's Club for monthly billing. Enterprise customers may arrange bank transfers for their custom agreements. Source: https://positionstack.com/pricing

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.

PositionStack: Can I downgrade or cancel my Positionstack plan?

Downgrades take effect at your billing cycle end. Cancellations require contacting customer service. Uptime guarantee is 99.9% average over 12 months. Source: https://positionstack.com/pricing

Source
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