Pixelfed

Pixelfed is a free and open-source image sharing social network service. The platform uses a decentralized architecture which is roughly comparable to e-mail providers, meaning user data is not stored on one central server. It uses the ActivityPub protocol, allowing users to interact with other social networks within the protocol, such as Mastodon, PeerTube, and Friendica. Pixelfed and other platforms utilizing this protocol are considered to be part of the Fediverse.

Much like Mastodon, Pixelfed implements chronological timelines without content manipulation algorithms. It also aims to be privacy-focused with no third party analytics or tracking. Pixelfed optionally organizes its media by hashtags, geo-tagging and likes based on each server. It also allows audiences to be distinguished in three ways and on a post-by-post basis: followers-only, public, and unlisted. Like several other social platforms, Pixelfed allows accounts to be locked, when followers must be pre-approved by the owner.