Been hunting for proper full-length audiobooks for years, and my absolute foundation is Libro.fm. What sold me is that you can pick a local bookstore to support with each purchase. That feels right. I listen through their app, which is fine—not as slick as some, but it works. Their selection mirrors Audible’s major titles, but without the Amazon of it all. Sometimes I miss the whispersync thing, but I’d rather own the files outright, which they let you do.
There’s also a quiet little champ called Downpour. It’s run by Blackstone, so they’ve got the publishing chops. They sell DRM-free MP3s, which is huge for archiving. The library isn’t infinite, but if you’re into classic lit or mysteries, they often have editions others don’t. It’s not a subscription, you just buy what you want. Their rental option is clever for one-off listens to doorstoppers like 'The Count of Monte Cristo'.