The following is a list of companies that provide assistance in self-publishing books or engage in vanity publishing. This list is provided to help editors evaluate whether sources published by these companies are reliable for purposes of including content in Wikipedia.
Use this list judiciously, always furthering your own investigation, as a company may have become a mainstream publisher complete with editorial staff or may not be primarily in the self-publishing business. Also, while there are many bestsellers, including some all-time bestsellers, such as Fifty Shades of Grey and The Joy of Cooking, that are or initially were self-published, editors should exercise caution when using from self-published firms and should always follow the specific exception criteria described at WP:SPS or WP:ABOUTSELF; see also WP:USESPS.
This list is not a complete list of companies currently engaged in the self-publishing business. If you know of a self-publishing company that is not on the list, please add it. Conversely, if you know that a company on this list is not primarily a self-publishing company, please remove it. Publishers do not have to be notable to be listed here; those that are notable should also be included in the article List of self-publishing companies.