GoToSocial is a Fediverse server project, written in Golang. It provides an alternative to existing projects such as Mastodon, Pleroma, Friendica, PixelFed etc. One of the key differences between GoToSocial and those other projects is that GoToSocial doesn't include an integrated front-end (ie., a webapp). Instead, like the Matrix.org's Synapse project, it provides only a server implementation and a well-documented API. On this API, developers are free to build any front-end implementation or mobile application that they wish.