kdpbook.io vs Story.com Storybook Publisher: an honest comparison
Story.com’s Storybook Publisher creates 8- to 48-page children’s picture books, free to start with pay-per-use credits for regenerations, and gives you paperback files with KDP instructions or publishes the book for you. Its FAQ says Kindle formatting isn’t supported yet. kdpbook.io also exports a fixed-layout Kindle eBook and covers more than picture books.
By kdpbook.io editorialUpdated
We make kdpbook.io, so we’re not neutral. Everything about Story.com Storybook Publisher below comes from its public pages as of (sources at the end of the page); prices and features may have changed since. Spot an error? Write to contact@thevibecodingagency.fr.
At a glance
| Criterion | kdpbook.io | Story.com Storybook Publisher |
|---|---|---|
| Output | Complete interior PDF, laid out page by page | Print-ready PDF at 300 DPI with bleed and crop marks, a cover PDF and a publication-details sheet |
| Trim sizes | Picture books: 8.5 × 8.5, 8.25 × 8.25, 8 × 10, 8.5 × 11, 7.5 × 9.25, 8.25 × 6, 6 × 9 in; 16 paperback trims across all types | 8.5 × 8.5, 8.5 × 11 and 8 × 10 in, per its product page; its KDP setup guide says to choose 6 × 9 in with No Bleed |
| KDP specs | Trim, bleed, margins, spine and page limits applied automatically, with a preflight check | Margins, bleed and typography handled automatically; a preflight check is not documented |
| Kindle eBook | Kindle EPUB (reflowable or fixed layout) + Kindle cover | Not supported yet, per its FAQ |
| Book types | 36 book types, from board books to novels, cookbooks, puzzle books and comics | Children’s storybooks, 8 to 48 pages |
| Character consistency | Character reference sheets reused on every illustration | Consistent characters on every page; you can upload reference images of your characters |
| Publishing help | Listing sheet (title, description, 7 keywords, categories, AI-disclosure answers); on paid plans the free kdpbook Publisher extension fills your KDP draft, or you upload the files yourself | Self-Publishing files with KDP instructions, or Fully Managed Publishing for a one-time payment (amount not published) |
| Selling rights | Commercial license on every paid plan; free-plan exports carry a preview watermark and are not for sale | Full commercial rights, per its FAQ |
| Pricing | Free: 2,000 credits once, no card. Plans $25–$99/month | Free to start; pay-per-use credits; Fully Managed Publishing fee not published |
What Story.com Storybook Publisher is
A children’s book creator inside Story.com, which also makes AI videos. You write a story or start from a prompt, pick an illustration style (cartoon, realistic, anime, comic and more), and it lays out 8 to 48 pages with consistent characters. Its Publish on Amazon flow offers Self-Publishing (a manuscript PDF, a cover PDF and a publication-details sheet, with step-by-step KDP instructions) or Fully Managed Publishing, where its team handles the process on your behalf. Both are for paperbacks.
Where it shines
- Free to start: its FAQ says creating your first storybook costs nothing.
- Fully Managed Publishing: its team handles the KDP publishing for you.
- Step-by-step KDP instructions, including which AI-disclosure answers to give.
- Its FAQ grants full commercial rights to the books you create.
- No subscription: a pay-per-use wallet whose credits never expire.
Story.com Storybook Publisher pricing
- Creating your first storybook is free, per its FAQ; regenerating pages or illustrations costs credits, and the price is shown before you generate.
- Wallet top-ups of $10, $20 or $50, no subscription; its pricing guide equates $10 with 1,000 credits.
- Its FAQ describes Fully Managed Publishing, where its team publishes the book for you, as a one-time payment; the amount isn’t published.
- Its FAQ answers disagree on whether PDF downloads cost credits.
As published on September 28, 2026. See the current prices on its website.
Which one should you choose?
Choose Story.com Storybook Publisher if…
- You want someone else to handle the KDP publishing for you.
- You only need a paperback picture book and want to start without a subscription.
- You also make AI videos and want one wallet for both.
Choose kdpbook.io if…
- You want a Kindle eBook edition next to the paperback.
- You publish other kinds of books too: coloring and activity books, journals, chapter books, novels, non-fiction.
- You want a page editor with live preview, a KDP preflight and a 3D preview before you export.
Questions
Is kdpbook.io a Storybook Publisher alternative?
Yes. Both make KDP picture books with consistent characters. kdpbook.io also exports a fixed-layout Kindle eBook and a listing sheet, and covers 36 book types; a 32-page picture book is estimated at about 1,614 credits (≈ $16), which fits in the free signup credits (free-plan files carry a preview watermark). Storybook Publisher is free to start and can publish the book for you, which kdpbook.io doesn’t do.
Can I make a Kindle eBook with Storybook Publisher?
Not today: its FAQ says Kindle formatting isn’t supported yet and that it provides print-ready PDFs for paperback publishing. You would need another tool for the eBook. kdpbook.io exports a fixed-layout EPUB and a Kindle cover from the same project as the paperback.
Sources · read on September 28, 2026
- Storybook Publisher (Story.com) (opens in a new tab)
- Story.com: How to publish your book on Amazon (opens in a new tab)
- Story.com pricing (opens in a new tab)
- Story.com pricing explained (opens in a new tab)
- Story.com FAQs (opens in a new tab)
- kdpbook.io, the AI book generator for KDP and kdpbook.io pricing
We re-read every comparison at least every 90 days. Spot an error? Write to contact@thevibecodingagency.fr.
Try it on your own book.
Describe a book in one sentence and see its plan and credit estimate before you launch anything.
2,000 free credits · no card required