ArcGIS is a geographic information system (GIS) for working with maps and geographic information. Developed by ESRI
License: Commercial
GRASS GIS (Geographic Resources Analysis Support System) is a geographic information system (GIS) software suite used for geospatial data management and analysis, image processing, producing graphics and maps, spatial and temporal modeling, and visualizing. It can handle raster, topological vector, image processing, and graphic data. Developed by GRASS Development Team
License: Open Source
GRASS GIS is an open-source software offering extensive geospatial analysis capabilities with a strong focus on customization, while ArcGIS is a commercial software known for its user-friendly interface and robust tools for enterprise applications. The choice between them often depends on budget, required features, and user expertise.