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GRASS GIS — GIS (Open Source)

GRASS GIS is an open-source GIS solution from US Army Corps of Engineers. Compare it against 80 other GIS tools on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is GRASS GIS?

GRASS GIS is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under GIS and published by US Army Corps of Engineers. Buyers typically evaluate GRASS GIS when they need a dependable GIS option and want to weigh the trade-offs between free, open-source and paid tools before committing.

GRASS GIS alternatives

If GRASS GIS isn't the right fit, compare these GIS alternatives side by side:

ARC/INFOArcGISArcGIS OnlineArcGIS ServerArcIMSArcMapArcSDEAutoCAD Map 3DAutodesk MapGuideAutodesk TopobaseBentley MapCadcorp SISCapawareCartoDB (CARTO)

Frequently asked questions

Is GRASS GIS free?
Yes. GRASS GIS is open source and free to use, with no purchase cost for the core product.
What are the best GRASS GIS alternatives?
Popular GIS alternatives to GRASS GIS include ARC/INFO, ArcGIS, ArcGIS Online, ArcGIS Server. See the full list of GIS on FreeSoftwareX.
What type of software is GRASS GIS?
GRASS GIS is an open-source GIS tool developed by US Army Corps of Engineers.

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