Question: Reddit community analysis tool?

Hi! I'm looking for Reddit community search and analysis tools. Particularly interested in seeing full list of subreddits by category since I would like to reach out to smaller subs.

I know there is a https://www.reddit.com/best/communities/1. It has all subs.
Also there are "top-n subs on the topic" lists in the mobile app (none on desktop, which is not very convenient)

Can you advise some?