r/incel - Was home to quite a few older blackpillers, ran by a smaller community of more extreme blackpillers, some of whom were actively banned from r/incels or thought it was too cucked. I believe Canino and fschmidt were more active on there.
r/incels - The absolute OG incel subreddit. Full of insane vanta blackpills, and is well known for being home to u/RippedRichandIncel's atomic blackpill Tinder experiment, which gained tens of thousands of views and blackpilled many normies and incels in denial worldwide. Not as much good OCs and art as Braincels, but the amount of rigid blackpills were eye opening at the time (now they are pretty much water, JFL). Was constantly brigaded by IT cucks and women trying to gaslight, but had extremely tight moderation. Got banned the same day incels.me (now known as incels.is) popped up, it was November 7, 2017 around 6:00 PM CDT where the subreddit got banned.
r/Braincels - Had the best memes, though lots of blackpillers, including myself at the time, argued that it was cucked, especially because there was a female moderator, and she didn't even like incels. But the subreddit was full of insanely good incel OCs, good art, lots of funnies, and unfortunately, when it got purged, shit tons of it got lost into the void.
r/Celmates - Similar to Braincels, but a much, much smaller community. Got the unfortunate fate of being spammed with CP and pictures depicting abuse by r/AgainstHateSubreddits and r/IncelTears soy basement dwellers (I unfortunately had to witness this first hand

) and got subsequently banned.
r/Shortcels - More similar to r/incels than r/Braincels, but was more around discussing issues with heightism. Never kept too much track of it, but it gained a lot of members. I believe it was the last major (1k+ member) incel subreddit that was on the Reddit soy chopping block.
Anything made after r/Braincels was just a temp subreddit that was made for shits and giggles to piss off soys. Then started with Braincels, Reddit has had a zero tolerance policy with our kind on their shitty soy website.