Both make personalized children's books. The useful difference is not whether a child's name appears — it is how much of the finished book can change from one child to another.
Fact-checked against current public product information · September 4, 2026
Research basis: competitor details on this page come from the linked official Wonderbly pages, not a Sundayfawn hands-on product test.
See the public testing method and evidence status →Wonderbly starts with a professionally authored title and then personalizes that title using options defined for the book. Depending on the title, that can include a child's name, a configurable character, qualities, siblings, friends, a teacher, a pet or other story variables.
Sundayfawn starts with the child and the material supplied for that child — photos, family, pets, interests, phrases, memories and other details — and uses those inputs to build the story and illustrations around them.
Neither model is automatically better. If you want a polished, fast personalization experience inside a known story, Wonderbly can be an excellent fit. If the child's unusually specific real world is the point of the gift, Sundayfawn is built for that different job.
Wonderbly's features vary by title, so this table summarizes patterns visible on current official product pages rather than making a blanket claim about every book in its catalog.
| Compare | Wonderbly | Sundayfawn |
|---|---|---|
| Starting point | A professionally authored title with personalization options defined for that book. | A story brief built from the child and the details supplied for that book. |
| Child's name | Yes. Current titles commonly place the child's name on the cover and throughout the story. | Yes. The child's name can appear throughout the custom story and on the finished book. |
| Visual identity | Often a configurable character chosen from title-specific options such as hair and skin tone. | Illustrated likeness based on customer-supplied photo reference. |
| Family, friends and pets | Available on some titles. For example, certain books support siblings, friends, teachers or a family dog. | Family members, friends and pets can be supplied as story material and can join the cast when relevant. |
| How much the story changes | Depends on the title. Some books vary qualities, chapters, names or other predefined story elements. | The supplied people, interests, memories, phrases and details can change the story and illustrations rather than filling one fixed customer-facing narrative. |
| Preview | Current Wonderbly product pages offer a full-book preview before purchase. | Customers can review the complete digital edition before the physical book is sent to print. |
| Physical formats | Varies by title and market. Current products include softcover, hardcover and, for some titles, layflat. | Current hardcover: 8.5 × 11 inches, matte case-wrap, 38 full-colour pages, 80 lb coated interior paper. |
Choose Wonderbly when you like a specific Wonderbly story and its available personalization options are enough for the gift. Its current product pages make the process easy to preview before buying, and many titles offer multiple physical formats.
Choose Sundayfawn when the reason for making the book is highly specific to one child: the family dog, Grandma, a favorite truck, a strange little phrase, a memory, a birth story or the things they are obsessed with right now.
If you're comparing the category more broadly, read our buyer's guide to personalized children's books before choosing a company.
Product features and formats change. We use first-party product pages for competitor facts and date-stamp this comparison when we re-check them. These sources are company-published claims, not independent lab observations.
a storybook no one else has ever read.