Sites like Twitter / X

Mastodon (🇩🇪 Germany) – A decentralized, open-source social network similar to Twitter.

Website: https://joinmastodon.org/
Bluesky (🇺🇸/🇫🇷 Partially European Influence) – Though American, it has strong European adoption and decentralized principles.

Website: https://bsky.app/
Diaspora (🇩🇪 Germany) – A decentralized, privacy-focused social network.

Website: https://diasporafoundation.org/