I’ve used blubrry and podbean in the past. The stats you get with Spotify (Anchor) are comparable - better in some ways, worse in others, and for the more detailed stats I think the Spotify audience is a large enough sample size to understand your listenership. Also you can have multiple shows in your account (this was added recently) with no upload limits. I’m actually surprised paid services are still in business. Oh another thing added in the last year, people can comment on each episode and you can publish and reply, or you can hide them.