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What is KDP Builder?

KDP Builder is a web-based publishing workspace for independent authors, entrepreneurs, freelancers, and small publishing teams. It combines book planning, AI-assisted writing, editing, cover design, interior formatting, and publishing metadata so users can prepare a book without moving between separate tools for every stage. Authors can start with an idea or bring an existing manuscript or interior. Guided workflows support novels, nonfiction, children's books, cookbooks, memoirs, puzzle and coloring books, journals, planners, and workbooks. Chapter review and locking controls keep authors involved throughout drafting. The Design Studio adds editable templates, layers, typography, print guides, and AI artwork editing. Available outputs include EPUB, DOCX, print-ready PDFs, cover files, descriptions, keywords, categories, author bios, and upload checklists, depending on the workflow. Files are downloaded for the user's chosen publishing platform, including Amazon KDP, IngramSpark, and Lulu. Quigglys LLC operates KDP Builder independently of Amazon. Users retain commercial rights and review their work before publication. The free account includes 75 one-time credits after email verification, valid for 14 days, with no credit card required. Monthly subscriptions are Starter $19/250 credits, Creator $39/700 credits, Studio $79/1,500 credits, and Agency $199/4,000 credits. Annual subscriptions and one-time credit packs are available; paid credits do not expire.

What is GrinTale?

GrinTale is a groundbreaking cloud-based writing editor tailored for the creation of long-form fiction, enabling users to effortlessly organize chapters, characters, notes, and mind maps within a single, user-friendly platform that requires no installation or manual saving. Key features include a tree-structured binder for systematic organization of chapters and folders with intuitive drag-and-drop capabilities, along with corkboard and outliner views that give a holistic perspective of the manuscript, complemented by comprehensive character sheets detailing elements such as identity, physical traits, psychological profiles, and backstories. Moreover, it boasts a mind map functionality that helps establish connections among characters, chapters, and project files, while also allowing the importation of Word documents (.docx) with automatic chapter detection and various export options, including PDF, DOCX, and EPUB formats. The editor is further equipped with a built-in encyclopedia and dictionary lookup to ensure smooth referencing during the writing process. You can explore GrinTale free for 15 days without the need for a credit card, and it accommodates multiple languages such as Italian, English, French, and German, making it a versatile tool for a wide array of writers. Additionally, its intuitive interface encourages creativity and productivity, ensuring that authors can focus on their storytelling without unnecessary distractions.

Media

Media

Integrations Supported

Additional information not provided

Integrations Supported

Additional information not provided

API Availability

Has API

API Availability

Has API

Pricing Information

$19/month (paid plans)
Free account: 75 one-time credits after email verification, valid for 14 days; no credit card required. Monthly plans: Starter $19/250 credits, Creator $39/700, Studio $79/1,500, Agency $199/4,000. Annual billing: $152, $312, $632, and $1,592 respectively. One-time packs: $8.99/100 credits, $21.99/300, $49.99/750, $89.99/1,500. Paid credits do not expire.
Free Version
Free Trial Offered?

Pricing Information

€29/year (list price €79/year)
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Quigglys LLC

Company Location

United States

Company Website

kdpbuilder.com

Company Facts

Organization Name

Bytesoo

Date Founded

2026

Company Location

Italy

Company Website

grintale.it/en

Categories and Features

Publishing and Subscriptions

Advertising Management
Books
Campaign Management
Catalogs
Circulation Management
Content Management
Layout & Design
Magazines
Newsletters
Newspapers

Categories and Features

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