A protocol for creating social networks. Based on Pump.io's "ActivityPump," ActivityPub enables the creation of content for independent networks. For example, social networks such as BookWyrm for book lovers, Facebook-like Friendica, music sharing Funkwhale, Mastodon blogging, Mobilizon event sharing, PeerTube video sharing, Instagram-like Pixelfed and WriteFreely text sharing are all based on ActivityPub. Although networks are independent, any two or more can be set up as a "fediverse" and interact with each other. See
Activity Streams and
social networking service.