Free tier with no limits. Paid plans: Day Pass $9.99 (24-hour one-time payment, up to 25,000 words), Pro $6/month when billed annually at $72 (up to 50,000 words/month), Unlimited $15/month when billed annually at $180 (no monthly word limit, 30,000 words/day fair use limit).
Free: 10 credits (one-time). Monthly: $7/mo for 70 credits. Yearly: $65/yr for 600 credits.
Key features
Autopilot mode for automatic rewriting until detection passes
Sentence-level alternatives for manual refinement
Preserve Formatting mode for document structure
Two humanization models: Premium and Stealth
Full history and cloud save for paid users
Plagiarism checker tool
TYPE-FORMULA pipeline that extracts insight types (diagnostic, wisdom, contrarian, data-backed, framework, story) and applies viral structures
Knowledge Bank to store, browse, and reuse extracted insights
10+ viral formula structures including parallel repetition, conditional framework, and bridge analogy
Chrome extension for scheduling posts directly to Substack
Rich-text editor with HTML and plain text export
MCP integration for Claude and Cursor
Automatic article URL processing from published or draft posts
Priority processing for paid plan users
What makes it different
Trained on 30 million real human writing samples from academia, blogs, and professional sources
Seven versions of refinement with continuous improvement
Designed specifically for Substack writers with formulas trained on viral patterns
Two-stage TYPE-FORMULA process instead of generic AI summarization
Knowledge Bank compounds over time as more articles are processed
From URL to scheduled post in minutes with no copy-paste needed
TextToHuman
Quick Viral Notes