Mastodon
https://mastodon.social/explore
Indie web
Fediverse
https://en.wikipedia.org/wiki/Fediverse
WordPress has an officially supported plugin that integrates WordPress blogs into the fediverse, allowing for comments to be exchanged between the comment section of a blog post and a fediverse instance’s reply function. The plugin was acquired by Automattic in March 2023,[32] and became available for all WordPress.com users in October of that same year.[33][34]
Solid
https://en.wikipedia.org/wiki/Solid_(web_decentralization_project)