Mapserver is described as 'MapServer is an Open Source platform for publishing spatial data and interactive mapping applications to the web. Originally developed in the mid-1990’s at the University of Minnesota, MapServer is released under an MIT-style license, and runs on all major platforms (Windows' and is a Map service in the travel & location category. There are more than 25 alternatives to Mapserver for a variety of platforms, including Windows, Web-based, Linux, Mac and Self-Hosted apps. The best Mapserver alternative is OpenFreeMap, which is both free and Open Source. Other great apps like Mapserver are VersaTiles, Mapbox Studio, TerraVisu and Plus Codes.
GRASS GIS not is for Web Server