As @nprofile1q... said you can use any git server you want or host it yourself. Grasp is designed to enable users and projects to either self host, use grasp services offered by individuals or teams in their network or use public free or paid servers. The idea is thst projects use multiple grasp services at the same time whic sync up to provides reduncancy. Its also really simple for maintainers to switch service providers by updating a single event.