While it is possible to put one's music on a distribution site like Spotify, iTunes, and YouTube for free, it is so much easier to pay the fee for a good aggregator the posts into many of the top sites all at once. Aggregators distribute exclusively to digital sites.
Here is an example: https://www.tunecore.com/. All it takes is a Google search to find more aggregators.
While I can speak with more authority on podcast aggregators, music distributors handle both physical and digital releases. I found this post that compiles a list of the top music distributors for 2025. It is a comprehensive breakdown of each site, including costs.
https://symphonic.com/best-music-distribution-services/
Let us know in the comments what aggregators and distributors you've used.
