I actually think Audible is pretty good. I would feel better about buying from them if it wasn’t fully owned by Amazon. Are there any good alternatives out there?
I'm a big fan of the Libby app, which you can acccess through your local library. If your library subscribes to the service (and it's likely they do if you live in the USA), then you just need to log in with your library card. https://libbyapp.com
There's also LibriVox, which is mostly a volunteer project. As its volunteers, the quality of the reading can vary widely, but you can sometimes find audio versions of older literature here that can't be found anywhere else. It's also free.