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

Server stats:

11K
active users

I've had a lot of people ask how BlueSky compares to Mastodon and the Fediverse. I've tried to make the answer as simple and easy to understand as possible:

🦋 BlueSky is designed to give corporations and wealthy people full control of the network. All of its traffic has to flow through expensive-to-run corporate relays.

:Fediverse: The Fediverse is designed to give ordinary people control of the network. All of its traffic flows directly from one cheap-to-run server to another.

@FediTips Probably worth mentioning at some point that the design for interop between platform corporations is pure vapor at this point and there are no real efforts underway to implement it.