GoToSocial

GoToSocial runs an ActivityPub federated social network server and implements the Mastodon client API. It is intended for people or organizations that want to operate a social network server in the ActivityPub federation. Mastodon client API support also makes it relevant to users who need that API when accessing the server. GoToSocial is open source and focuses on the server side of a federated social network. Its concrete protocol is ActivityPub, and its named application interface is the Mastodon client API. A key limitation is that GoToSocial is a server, not a Mastodon client; users still need a client to use a client API. It also should not be treated as Mastodon itself simply because it implements the Mastodon client API. GoToSocial fits deployments that specifically call for an ActivityPub server with a Mastodon client API implementation rather than a standalone client application.