Self-publishing is the publication of media (e.g. books, music, art) by its author at their own cost, without the involvement of a publisher. However, the author may engage professionals or companies to assist with various aspects of publication, distribution or marketing. This page lists the best-known of such companies. It is not an exhaustive list.

Assisted self-publishing companies offer services such as editing, proof-reading, cover design, formatting, printing, marketing and promotion. They may offer these services separately or as a package. They do not take any rights from the author and the author retains total control of the work and decisions relating to it.