When it comes to pitching your music to blogs and playlists, the best route is being personal. Get to know the individuals curating the blogs and playlists to ensure it’s not just a cold pitch.
Here are a few sites to help you start submitting your music for free:
Indiemono is one of the largest independent playlist communities. They love breaking new artists, especially if you have less than 1,000 streams. They also require you to “unlock” the submission forms by following each playlist you are targeting.
Soundplate has a selection of playlists curated by their team. In addition, they have a new submission system that lets you submit music to multiple other playlists. They set limits to how many playlists you can access, however, easy to use and the ability to submit own music.
Daily Playlists features submittable playlists. They have their own curated playlists for Rock, Hip Hop, Indie, and Electronic. They have an easy to use interface allowing you to submit one track to multiple playlists.