Raw numbers are perhaps not enough to get across just how bad the centralisation of the Fediverse by mastodon.social is. I've done a chart to show this visually, hopefully this will make the situation clearer?

Given the circumstances, getting people to join other servers except mastodon.social would greatly help decentralise the Fediverse. It's no longer big vs medium vs small, it's more like supergiant deathstar mastodon.social vs everyone else ๐Ÿ˜ž

Graph showing twelve different Mastodon servers with their percentage of the active Fediverse on the Y axis. Mastodon.social has almost 30% of active Fediverse users while all other servers have about 1% or less.

Caption under chart says "Largest Mastodon servers vs % of active Fediverse, 21st November 2025, data from FediDB.com"

Another caption next to the bar for mastodon.social says "Percentage occupied by mastodon.social is growing! It used to be less than 15%! JoinMastodon.org and official Mastodon apps are STILL promoting mastodon.social!"
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If you have a fediverse account, you can quote this note from your own instance. Search https://social.growyourown.services/users/FediGarden/statuses/115587663680180965 on your instance and quote it. (Note that quoting is not supported in Mastodon.)