Free: 2,500 words per month, all intensities, API access (60 requests/min), document history, no credit card required. Pro: $19/month for 100,000 words per month, 300 requests/min API limit, priority support. Word pack: $9 for 50,000 words with no expiration or subscription.
Not given
Key features
Self-hosted fine-tuned language model
Three intensity levels per request
3-5 second average response time
Content never used for training
Works with any AI model
Webhook support for real-time events
Dashboard with API key management
Document history and web-based interface
AI-powered content generation
Multilingual support
Amazon KDP-ready formatting
Automatic structure and outline generation
Quick book generation
Intuitive user interface
Multiple book type support
Export in DOCX and PDF formats
What makes it different
Rewrites sentence structure and rhythm, not just synonyms
Completely private with no data sharing or third-party APIs
Simple integration with any HTTP client
Generous free plan without credit card requirement
API-first design for programmatic use at scale
Create complete books in minutes without writing a single word
AI handles everything from idea to polished manuscript
Full commercial rights to generated content
Instantly ready for KDP and other platforms
Scale production to generate multiple titles quickly
ToHuman
BookScribi