mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

Administered by:

Server stats:

360K
active users

is ready to open the network.

Starting today, Bluesky will not require invite codes anymore and anyone can join the network. Later this month, the team will roll out an "experimental early version of federation", allowing other people to run their own 'Personal Data Server' (PDS).

bsky.social/about/blog/02-06-2

BlueskyJoin Bluesky Today (Bye, Invites!) - BlueskySign up for Bluesky! No invite code required.