Comment by omoikane

Maybe Bluesky is not quite the Twitter rival it set out to be, but it's got a better shot than Mastodon, according to the user count graphs here:

https://bsky.jazco.dev/stats

https://mastodon-analytics.com/

Bluesky has a higher total user count. I think the number of active users might be higher too, but I am not sure what's mastodon's definition of an active user for the second link above. Anecdotally, Bluesky feels more lively for me because that seem to be the default destination for Twitter refugees.