https://lemmyverse.net/communities has the communities across Lemmy, but afaik doesn't have a compare function to subreddits.

There is a lemmy app (not sure which one) that can import subreddit subscriptions and matches them to lemmy communities, not sure how it does that

We should create a stickied thread on fedigrow or communitypromo for at least the foreseeable future, so we don't have to depend on something like this.

I think @rglullis@communick.news is crowdsourcing recommendations over at https://fediverser.network/communities

Edit: Apologies to rglullis for the multiple pings you probably received, I just want to make sure that people find your site.