Mastodon is a free, open-source social network. A decentralized alternative to commercial platforms, it avoids the risks of a single company monopolizing your communication. Pick a server that you trust — whichever you choose, you can interact with everyone else. Anyone can run their own Mastodon instance and participate in the social network seamlessly.
Freehold.Earth is a free-speech centered community, extremely lightly moderated (we'll do what we can about spam and harassment, and possibly some management of the federated public timeline, that's about it...do as you please when communicating with followers!). More info at https://freehold.earth/about/more