SpatiaLite is described as 'Spatial extension to SQLite, providing vector geodatabase functionality. It is similar to PostGIS, Oracle Spatial, and SQL Server with spatial extensions, although SQLite/SpatiaLite aren't based on client-server architecture: they adopt a simpler personal' and is a Map service in the travel & location category. There are three alternatives to SpatiaLite for a variety of platforms, including Mac, Windows, Linux, Web-based and Android apps. The best SpatiaLite alternative is PostGIS, which is both free and Open Source. Other great apps like SpatiaLite are CartoDB and H2GIS.
PostGIS is targeting a different database - PostgreSQL