First Book AI vs Lex

Comparing the features of First Book AI to Lex

Feature
First Book AI
Lex

Capability Features

AI Book Agent
AI Feedback
Book Credits Additive
Book Structure
8 chapters, 24–32 sections
Collaborative Documents
Commands
Comments
Content Ownership
Edit Content
Full-Length Book Generation
Guided Book Creation
Minimalist Interface
Mobile Web
No Training on User Data
Priority Support Team
Publish on Amazon KDP
Publishing
Quick Access
Real-time Collaboration
Roadmap Features
Additional languagesIn-text references & citationsReal-time collaborationAdvanced analytics
Section Editing
Setup Call Included
Step-by-step Guidance
Step-by-Step Questionnaire
Support Response Time Team
Within one business day
Team Use
Title Ideas
Track Changes
Versions

Integration Features

EPUB/MOBI Workflow
Export Format
Microsoft Word (.docx)Google DocsPDF (print-ready)
Export to DOCX
Export to PDF
Google Docs Export
Mac App Availability

Limitation Features

Current Languages
English only (as of now)
Manuscript Length Target
≈30k–35k words
No API Access
No Plugin Support
Plagiarism Responsibility
User responsibility

Other Features

Book a Demo
Email Support
hello@lex.page
Google Docs Replacement
User Types
AcademicsWritersMarketersModern Creators

Pricing Features

1 Book Plan
$19 one-time
10 Books Plan
$129 one-time
3 Books Plan
$47 one-time
30-Day Money Back Guarantee
50 Books Plan
$449 one-time
Book Credit Bundles
1 Book – $193 Books – $4710 Books – $12950 Books – $449
Get Started Free
No Monthly Fees
No Subscription
One Time Payment
Refund Policy Duration
14-day money-back guarantee