I'm on kbin (I think it has much better algorithm that lemmy, and magazines/communities look more active even though it is the same network) and tildes.net.
Initially I felt like I had to visit reddit, but over past days lemmy/kbin feels more and more active. Still not like reddit, but active enough to not feel the need to go to reddit. It's possible that maybe I just found right communities that I'm interested in, or numer of people increased, or both.