ActivityPub
A decentralized social networking protocol that allows multiple independent servers to interconnect, enabling cross-instance following and content distribution.
Timeline (last 90 days)
Compared with the fully decentralized ActivityPub (the protocol used by Mastodon), Bluesky's degree of federation is still limited, and the main server has considerable discretion over content visibility.
Federation refers to a group of independently operated servers communicating with one another under a common protocol, where users can register on any instance and interact with users of other instances; email and ActivityPub (used by Mastodon and others) are typical examples.
Mastodon is a decentralized open-source social network that uses the ActivityPub protocol, consists of independent servers (instances), and lets users follow each other across instances.
Representatives of decentralized protocols and federated architectures are Fediverse applications such as Mastodon backed by ActivityPub and content-addressed networks such as IPFS, whose core proposition is to detach identity, data, and interoperability rules from a single platform so that users can migrate across nodes.
The Fediverse is a collection of social platforms that communicate with each other through the ActivityPub protocol, and Mastodon is the most mainstream one among them.
The Fediverse is based on the ActivityPub protocol, connecting independent instances such as Mastodon and Pixelfed.
Lemmy is an open-source federated forum system based on the ActivityPub protocol and serves as a decentralized alternative to Reddit.
Mastodon uses the ActivityPub protocol to push activity streams between instances.
Ghost has achieved interoperability with the Fediverse, supporting the ActivityPub protocol.
An important trend in 2024 is that Newsletter platforms have begun supporting the ActivityPub protocol, and Ghost has already achieved interoperability with the Fediverse.
All Facts (10)
Mastodon uses the ActivityPub protocol under the hood, which shares the design philosophy of decentralization and open standards with RSS.
60%UnverifiedCompared with the fully decentralized ActivityPub (the protocol used by Mastodon), Bluesky's degree of federation is still limited, and the main server has considerable discretion over content visibility.
50%UnverifiedFederation refers to a group of independently operated servers communicating with one another under a common protocol, where users can register on any instance and interact with users of other instances; email and ActivityPub (used by Mastodon and others) are typical examples.
50%UnverifiedMastodon is a decentralized open-source social network that uses the ActivityPub protocol, consists of independent servers (instances), and lets users follow each other across instances.
50%UnverifiedRepresentatives of decentralized protocols and federated architectures are Fediverse applications such as Mastodon backed by ActivityPub and content-addressed networks such as IPFS, whose core proposition is to detach identity, data, and interoperability rules from a single platform so that users can migrate across nodes.
50%UnverifiedThe Fediverse is a collection of social platforms that communicate with each other through the ActivityPub protocol, and Mastodon is the most mainstream one among them.
50%UnverifiedThe Fediverse is based on the ActivityPub protocol, connecting independent instances such as Mastodon and Pixelfed.
50%UnverifiedLemmy is an open-source federated forum system based on the ActivityPub protocol and serves as a decentralized alternative to Reddit.
50%UnverifiedMastodon uses the ActivityPub protocol to push activity streams between instances.
50%UnverifiedGhost has achieved interoperability with the Fediverse, supporting the ActivityPub protocol.
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