Company lists · Data verified August 2026
Top 25 Author platforms based in the United States
There are 446 author platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 6,542 professional contacts across them, including 910 with verified work emails and 1,951 with mobile numbers. New York is the largest hub.
This list covers author platforms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.
The 25 largest author platforms based in the United States
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  Lulu Press, INC | 62 |
| 2 |  Authorhouse | 15 |
| 3 |  Xlibris | 12 |
| 4 |  Author Solutions, LLC | 85 |
| 5 |  Amazon Kindle Direct Publisher | 3 |
| 6 |  Createspace | 21 |
| 7 |  Podium Entertainment | 59 |
| 8 |  Spines | 57 |
| 9 |  BLURB | 36 |
| 10 |  Outskirts Press, INC | 1 |
| 11 |  Bookbub | 98 |
| 12 |  publishing.com | 6 |
| 13 |  Bookbaby | 29 |
| 14 |  Trafford Publishing | 5 |
| 15 |  Advantage The Authority Company | 28 |
| 16 |  Palmetto Publishing | 30 |
| 17 |  Highwire Press | 24 |
| 18 |  Gatekeeper Press | 9 |
| 19 |  Authorify | 12 |
| 20 |  Amazon Self-Publish Ebooks Authors | 2 |
| 21 |  Salt And Sage Books | 2 |
| 22 |  Franklin Publishers | 1 |
| 23 |  Author Reputation Press LLC | 1 |
| 24 |  Turner Book Writers | 2 |
| 25 | Barker Publishing | 1 |
Showing 25 of 446 author platforms based in the United States
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Author platforms based in the United States at a glance
As of Aug 28, 2026Companies by employee count
Author platforms by metro
| Metro | Companies |
|---|---|
| Author platforms in New York | 38 |
| Author platforms in Houston | 14 |
| Author platforms in Los Angeles | 9 |
| Author platforms in Austin | 9 |
| Author platforms in San Diego | 7 |
| Author platforms in Las Vegas | 6 |
| Author platforms in San Francisco | 5 |
How this list was built
- Source
- The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- Inclusion
- Companies whose own business descriptions match “author platforms”, with match quality audited by blind human judging, and headquartered in the United States.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Contact records re-verify on a rolling cadence; 3 contacts on this list were re-verified in the last 30 days.
- Refresh
- Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.
Frequently asked
How many author platforms are there based in the United States?
There are 446 author platforms headquartered in the United States as of August 2026 (RevenueBase).
What is the largest company on this list?
Lulu Press, INC, headquartered in Triangle, tops this list with the largest team on record.
Which city has the most author platforms?
New York leads with 38 headquartered companies, followed by Houston (14) and Los Angeles (9).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 910 verified decision-maker contacts tracked across these 446 companies.
How current is this list?
The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.
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About this data
RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.