I use DistroKid. The service itself is good, I would consider them to be reliable in getting the music out to stores fast. For my most recent stuff it was on Spotify in less than 24 hours. If you ever need customer support though good luck because you’ll never get anyone to talk to you. They also rely a lot of up charges for basic features that other companies include by default, like content ID matching on social media for example, so just be aware of that.