One of the most interesting is the Natural Language Playlist, an AI-powered music playlist generator. It'll create a playlist tailored to your musical and cultural preferences based on a text-based database of song metadata. You can type in a description of the playlist you want, and the AI will create a curated playlist that fits the bill. It's good for finding music with more subtle attributes and descriptions, so it's good for exploring new music that suits your tastes.
Another good option is PlaylistAI, which has an AI-powered playlist generation service available on Spotify, Apple Music and Deezer. You can create playlists on the fly by typing in text prompts that can include genre and mood. It also offers smart suggestions based on your actions and moods, and options like artist network exploration and BPM range filtering to blend styles to your taste.
If you want something more tightly integrated with Spotify, Playlistable is a good option. This AI-powered service generates playlists based on your mood, listening history or favorite artists. It's got options like Song Match and Artist Match that can generate playlists from a song you like or an artist you like, so you can explore new music while still keeping your preferences in mind.