join-lemmy.org regularly crawls all active Lemmy instances to keep the instance list updated. Additionally it also collects data from all Lemmy communities. The data is now publicly available in the following git repository:
https://github.com/LemmyNet/lemmy-statistics
Check the readme for details about the available data. Interestingly the numbers are quite different from other websites:
| join-lemmy.org | fediverse.observer | fedidb.com | |
|---|---|---|---|
| Monthly Active Users | 42.170 | 36.336 | 50.063 |
| Instances | 512 | 376 | 446 |
Here are some ideas what to do with the data:
- Recreate the Lemmymap, graphically showing the connections or defederations between instances.
- Render graphs, which could be added directly to join-lemmy.org (#532).
- Investigate what is causing the different numbers shown above.
- Run various types of analysis, like this one done by @malsadev.
- Build a tool to help users discover interesting and relevant communities.


Speak for yourself, the fact that Lemmy offers leftist and communist instances is a big draw for a lot of users, myself included. They are prominent due to their size and activity, and recommending them for those who want them is good for growth. Further, for those that prefer not to be on leftist/communist instances, it’s good that the communists have a place to go to, rather than joining, say, Lemmy.world, which would be a poor fit and result in far more friction.