KDP tool comparisons

Two tools that do the same job, side by side. Prices and platforms come from each listing; we only compare what the vendors' own pages support. For wider shortlists see the best-of lists.

• Book Bolt vs BookBeam

  Book Bolt (from $23.99 a month) is built around low-content books: research plus a cover and interior studio sized to KDP specs, puzzle generators and AI credits. BookBeam (from $47 a month, or $29 billed yearly) is built around research and tracking for any book: keyword and niche research, category history, rank tracking and trademark checks, plus a free Chrome Extension Lite. Low-content publishers lean to Book Bolt; catalog builders to BookBeam.

• Publisher Rocket vs KDSPY

  Both are one-time purchases for researching Amazon books. Publisher Rocket ($199) is a desktop app with keyword search, category search across 19,000+ categories, a competition analyzer and an Amazon Ads keyword generator. KDSPY ($79) is a browser extension that overlays category, keyword and revenue estimates on Amazon pages as you browse, with a longer 60-day refund window. Pick Rocket for structured research and ads; KDSPY for quick checks.

• Vellum vs Atticus

  Both are one-time purchases that turn a manuscript into KDP-ready ebook and print files for unlimited books. Vellum runs only on Mac and costs $199.99 for ebooks or $249.99 with print (24 trim sizes, PDF/X-1a output). Atticus costs $147, runs on Windows, Mac, Linux and Chromebook, and adds writing in the same app. On a Mac, choose by style and budget; on anything else, Atticus is the option of the two.