this post was submitted on 28 Jul 2026
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Fediverse

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A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, Mbin, etc).

If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!

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In the graph above I've arranged the 28 Threadiverse instances with at least 200 monthly active users (MAU)—orange instances running Lemmy, green Piefed, and red Mbin—on the basis of which instances they defederate.

Each instance has its MAU count listed below it, sourced from the latest MAU figures at Fediverse Observer, with adjustments made to the totals for Piefed (due to undercounting by outdated instances, as noted here; I used @Vicinus@piefed.zip's suggested estimate of 7,200 Piefed users) and Mbin (due to tardigram.com having a duplicate listing).

After adjustments, there are an estimated 43,287 monthly active Threadiverse users (35,184+7,200+903), of whom 87.84% are on the 28 largest instances. The percentages listed alongside the MAU figures correspond to each instance's share of the total MAU count.

Defederation data was sourced from Federation Checker. The tool doesn't support Mbin instances, so I left fedia.io in its own category. If any defederations are missing, feel free to let me know. Ideally such a chart should also include community blocks to better illustrate which instances block what, but that data doesn't appear to be as easily searchable.

I also noticed cases of some instances being listed as being defederated by another instance, despite not appearing on the defederation list for that instance (i.e. reddthat.com and lemmygrad.ml are listed as being mutually blocked, despite neither having the other on their block lists). In testing that federation, I noticed that !wholesome@reddthat.com did not federate to Lemmygrad while !memes@reddthat.com did, so clarification on that matter would be helpful.

While I'll update my generalized chart as needed to correct errors, perhaps at some point an automated federation mapping tool similar to the one feddit.de formerly hosted could be developed to more completely illustrate instance federation.

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[–] Valmond@lemmy.dbzer0.com 122 points 1 month ago (4 children)

Well that's a confusing graph.

[–] SCmSTR@lemmy.blahaj.zone 46 points 1 month ago* (last edited 1 month ago) (1 children)

Since defederating is essentially an explicit block list and is directional, my assumption is that the groups that are circled have defederated from the things they're pointing at. I could be wrong.

Map needs a key/legend.

The red circled stuff seems to be only one possible option, but isn't visually very distinct, and the red circle shouldn't be broken like that, just make sure the lines are all visible.

[–] Zedstrian@sopuli.xyz 25 points 1 month ago

Apologies for the confusion; didn't want to make it overly cluttered, but in retrospect I see that a legend would have been useful. I'll incorporate suggestions in a revision.

[–] mehquestion@lemmy.world 20 points 1 month ago (2 children)

Yeah, as someone who is struggling to understand the concept of federation...this doesn't help me at all.

I guess what its saying, if you're on lemmy.world, you can't access content on lemmy.zip?

[–] lastlybutfirstly@lemmy.world 15 points 1 month ago (7 children)

If I'm reading it correctly, lemmy.world cut ties from lemmygrad.ml and hexbear.net while hexbear.net and beehaw.org cut ties with lemmy.world. lemmy.zip appears to be connected to everyone.

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[–] ProdigalFrog@slrpnk.net 9 points 1 month ago

The ones at the bottom that are below the None category aren't defederated from anyone, so they can access every instance.

[–] VitoRobles@lemmy.today 18 points 1 month ago

Yeah I cant understand it at all.

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[–] kingofras@lemmy.world 61 points 1 month ago (21 children)

I say, I really don’t get why so many people stay over on Reddit.

This might be a micro version of the actual future internet, where we walk away from the global model and split it into ideological countries who believe the best way forward is to stop talking to the other group.

We’ve come a long way from drawing artificial lines on maps.

[–] Cris_Citrus@piefed.zip 92 points 1 month ago (16 children)

The fediverse is great if you fall into the like 5 interests that are pretty well represented here.

But if the communities you wanna engage with aren't really active enough for potential posters to not just forget they exist, or you don't really want to be on a platform where 75% of the front page is news or memes about the state of the world politically, its not neccisarily a great replacement to reddit

For me it happens to cover enough of my bases, but I can get why it wouldn't for many people.

[–] CubitOom 16 points 1 month ago (1 children)

Just like in real life, one must grow and sometimes create the communities they want to be apart of.

[–] Cris_Citrus@piefed.zip 34 points 1 month ago

While thats true, if my friend whose biggest interests are science informed dog training and animal genetics joins the threadiverse there are not enough people here who genuinely really care about those subjects to actually sustain any of the social connection she's looking for around them.

If my friend who's super into basketball and competitive league of legends join she'd have at least a couple people to talk to, but its fundamentally not what she's looking for to talk to exactly 3 other people who care about the thing she's into.

I try to remember that as much as I love the fediverse and feel at home here, it has real limitations for lots of people, and its okay if its not in a state they can go enjoy very easily. This is a space that I am passionate about and want to contribute to. I don't expect everyone to do labor to invest in a space that isnt their passion just to chat with folks when they have the ability to chat with folks somewhere else, even if that place has bigger picture downsides or harms associated with it.

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[–] pruwybn@discuss.tchncs.de 15 points 1 month ago

You can still choose one that talks to everybody else. In fact, this graphic might be a nice tool for new users who want advice beyond "Just choose any instance, it doesn't matter" or "Just use lemmy.world".

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[–] kersploosh@sh.itjust.works 54 points 1 month ago (1 children)

The beehaw.org/sh.itjust.works defederation is really one-way. Beehaw defederated from us after some exceptionally bad trolls were operating from sh.itjust.works in 2023. IIRC, they requested that we also defederate from them to really make sure the split was made. We honored their request.

We would happily reconnect if Beehaw decided they want to federate with us again. If not, then that's fine; they have a right to associate with whomever they like.

I believe infosec.pub temporarily defederated from us around the same time for the same reason. It was a rough time.

[–] Zedstrian@sopuli.xyz 22 points 1 month ago (1 children)

I'll adjust the graph by the next version to account for it as an exception.

[–] kersploosh@sh.itjust.works 23 points 1 month ago* (last edited 1 month ago) (2 children)

If you want to complicate the graph further, I believe hexbear federates using an allow list. Blahaj, lemmy.ca, and sh.itjust.works are not on the allow list, so they are effectively defederated. I haven't looked further to see which other large instances may be affected.

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[–] AI_toothbrush@lemmy.zip 31 points 1 month ago (8 children)

Very proud of lemmy.zip! Joined very early on cause the name sounded cool lol, and apparently a lot of others also did. If i remember right we had a vote on defederations and the only major one to happen(or maybe the only one, idk) was exploding heads which was a nazi instance with CSAM on it so that was obvious, even that was mainly cause of the CSAM. I really like the approach of users being able to block instances and communities rather than the instance deciding for me. I still have ml and hexbear blocked tho cause they banned me after i stood up for trans rights or something lol

[–] Million@lemmy.zip 9 points 1 month ago

.zip and Demogodrick definitely cool.

I also lucked out by joining here just because I couldnt join more popular instances at the time. Happy that I landed here

[–] LincolnsDogFido@lemmy.zip 8 points 1 month ago* (last edited 1 month ago)

I'm feeling the same way. I've bounced around a few places since joining. I started on midwest.social which was great for a while, but I think the instance grew more than the dev could keep up with. I started seeing connectivity issues and problems displaying content so I reluctantly migrated to .world to see what joining the largest instance would be like. The technical issues went away but I couldn't figure out why I could no longer see /c/piracy until I realized that they're a bunch of pushovers that defederated from dbzer0 based on some liability bogeyman. So I found myself on Lemmy.zip where I can police my own content and have no technical issues.

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[–] TropicalDingdong@lemmy.world 28 points 1 month ago (2 children)

I really like this but I can not figure it out. Would you be willing to make the data available?

[–] Zedstrian@sopuli.xyz 35 points 1 month ago* (last edited 1 month ago) (3 children)

The MAU numbers for instances were sourced from Fediverse Observer and calculated as a percentage of 43,287 for the percentages, but here's a table of the defederation data:

Lemmy
Instance Defederates
lemmy.world Hexbear, Lemmygrad
sh.itjust.works Beehaw, Hexbear, Lemmygrad
lemmy.zip N/A
lemmy.ml fedinsfw.app
feddit.org fedinsfw.app, Hexbear, Lemmygrad
hexbear.net lemmy.world
lemmy.dbzer0.com Lemmygrad, Feddit.org
lemmy.ca Hexbear, Lemmygrad
lemmy.blahaj.zone fedinsfw.app, Hexbear, Lemmygrad
programming.dev Hexbear
discuss.tchncs.de Lemmygrad
sopuli.xyz fedinsfw.app, Hexbear, Lemmygrad
lemmygrad.ml fedinsfw.app
lemmy.today N/A
slrpnk.net Hexbear, Lemmygrad
feddit.uk N/A
infosec.pub fedinsfw.app, Hexbear, Lemmygrad, Lemmy.ml
reddthat.com N/A
jlai.lu Lemmygrad
beehaw.org sh.itjust.works, lemmy.world, Lemmygrad, Hexbear
pawb.social Hexbear, Lemmygrad
thelemmy.club N/A
feddit.nl N/A
Piefed
Instance Defederates
fedinsfw.app Hexbear, Lemmygrad
piefed.social Hexbear, Lemmygrad
piefed.ca Hexbear, Lemmygrad
piefed.zip N/A
Mbin
Instance Defederates
fedia.io ?
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[–] taiyang@lemmy.world 17 points 1 month ago (2 children)

Things that pop out to me:

  1. The Internet was made for porn, both in users and less defederating.
  2. The main blocks really are mostly the Triad (grad, hexbear and ml) which I get. I personally don't mind tankies despite the instance I'm on, but they can sometimes echo Russian propaganda that's demonstrably false. Communism as a concept is ok, though.

The Beehaw thing predates me, I heard they're nice people, though. I also agree with the sentiment that more fringe groups and random porn might scare away newbies, so I get why things are the way they are.

[–] Grail@multiverse.soulism.net 8 points 1 month ago

Our instance deferated fedinsfw because of the adult porn pretending to be child porn pretending to be adult porn. According to Australian law, fake child porn is legally considered child porn, and also our users think it's gross.

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[–] leadore@lemmy.world 15 points 1 month ago* (last edited 1 month ago) (1 children)

OK I think I get how to read this, once I understood the concept. Very nice work.

Maybe it would be a little clearer if the lines where boxes overlap were just slightly offset -- it would help see and distinguish them. For example if the blue box was moved down by just a little more than the width of the red lines, instead of being directly on top of them. If that makes sense.

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[–] JRaccoon@discuss.tchncs.de 13 points 1 month ago (3 children)

Kinda eye-opening, thx for making the chart. I hadn't realized it had gotten this bad. In my opinion, defederation should only ever be used to combat spam, not because of ideological differences or disputes between individuals.

One of the most common tips for people looking to switch over from Reddit has been that the instance you choose doesn't really matter. But it clearly does. Choose the "wrong" instance and you may suddenly find yourself cut off from a sizable portion of other users because someone else decided they know better than you what you should and shouldn't see.

I'm lucky to be on an instance that has "only" defederated one instance in this chart (lemmygrad.ml). I don't really follow the drama around here, so I have no idea why that instance is banned. All I see is that there are 558 active users I'll never be able to interact with just because someone I don't personally know (my instance admin) made that decision at some point.

Wasn't there just a big drama because some app developer built-in their own opinionated blocklist into their app or something? How is this any different?

My point being, why not leave these kinds of drastic decisions to individual users, who can and should block whoever they want, instead of dividing threadiverse into silos at the instance level?

[–] Zedstrian@sopuli.xyz 15 points 1 month ago* (last edited 1 month ago) (7 children)

Note that defederations with smaller instances (representing 12% of users) are not represented here, so there are even more defederations than what is listed here. Hopefully that will come across better with more data in the next version of the graph.

As requiring new users to implement multiple blocks off the bat can be a big ask for those still on the fence about leaving Reddit, defederating known NSFW, troll, and tankie instances can improve new user retention. For those who prefer more hands-off moderation practices, specific instances can cater to them, but I think a more tailored experience is better for users arriving from Reddit.

[–] JRaccoon@discuss.tchncs.de 11 points 1 month ago

I think the main issue is that this isn't communicated clearly. Most people joining a random instance listed on join-lemmy.org won't know what defederation means and they have no way of knowing that by choosing that particular instance they'll be cut off from a certain number of other users.

[–] spinning_disk_engineer@lemmy.ca 8 points 1 month ago (1 children)

I'm not so sure, I'd rather have a prepopulated blocklist that I can further configure myself, as opposed to instance level blocks that I can't reverse.

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[–] NaibofTabr 9 points 1 month ago* (last edited 1 month ago) (2 children)

This is what organic growth looks like. It spreads in fits and starts, bits of it clump together and pile up, pieces of it separate and take on life of their own or die. When part of it rots (hexbear) the larger organism cuts it off to limit the spread of disease.

Lemmy (and more generally, ActivityPub) is growing, not like a rose bush, but like a field of grass. Some pieces of it are blooming, some pieces of it are dying, some pieces are adapting to different environments, but the spread is inexorable and the horizon unlimited.

If you want to see what the field is like on the other side of that hill, well it won't just come to you, you'll have to get up and go to it.

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[–] OpenStars@piefed.social 8 points 1 month ago (9 children)

Many fantastic instances do exactly that.

But in answer to your question, you may want to research The Intolerance Paradox. In short, when people refuse to follow the rules it kinda becomes spam. Even if you were okay with CSAM or pictures of pigs actively showing the poop falling out of their anuses (sadly, I bet you think I am being hyperbolic here? nope, this is kinda Hexbear's major schtick), the fact remains that it scares away newcomers.

I will note that if you self-host your own instance then you have perfect control over every aspect of your experience, being able to fine-tune it to perfectly suit your precise needs. Otherwise you will want to choose an instance provider that aligns with whatever your needs are. Some people will choose one of the instances that defederates from almost nothing, while others actually want an experience that is more what they are used to and would expect coming over from the overly bot-modded Reddit, i.e. they want (even outright demand) that censorship be done for them.

This is why the instance pickers need to carefully explain what each instance is about, since there is not just one audience with a single set of needs & expectations.

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[–] pruwybn@discuss.tchncs.de 12 points 1 month ago

This is cool, thanks!

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