This document discusses the open source business case of Geosparc, a company that develops and commercially supports the open source web GIS framework Geomajas. Geomajas is an extensible client-server framework that enables integrated GIS solutions. Registering open source code provides some protection by establishing you as the original creator, though it is still relatively easy for others to copy. Openness can lead to opportunities through community involvement, competitive analysis, and having nothing to hide. Geosparc's future plans include proprietary alternatives alongside the open source version and strategic partnerships to maintain control over the value chain.