Secure Scuttlebutt is p2p and offline-first. Mastodon is neither one of these and community-hosted. More about building the community part of the social networ

Secure Scuttlebutt is p2p and offline-first. Mastodon is neither one of these and community-hosted. More about building the community part of the social network than the truly decentralized backbone (where each user has a copy of all posts of users in his/hers network).