Audible

Audible is Amazon's audiobook service and holds the deepest English-language catalogue, including a large volume of exclusive productions.

Its credit model is unusual: a monthly subscription grants credits redeemable for titles, which suits regular listeners and is poor value for occasional ones — worth checking against per-title purchase before subscribing.

Books bought with credits remain in your library after cancellation, which is a meaningful difference from services where access ends with the subscription.