AI email builder that applies your brand automatically
Turn Substack articles into viral social posts
Stage
Not given
Startup
Founded
Not given
2025
Based in
Not given
Not given
Pricing model
Freemium
Freemium
Pricing
Free plan with no time limit; Starter $12/month or $10/month billed yearly; Pro $27/month or $23/month billed yearly; Agency $119/month or $99/month billed yearly.
Free: 10 credits (one-time). Monthly: $7/mo for 70 credits. Yearly: $65/yr for 600 credits.
Key features
Brand book PDF upload with automatic style extraction
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
No coding or design skills required
Build first email in 15 minutes
164 templates available free forever
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
Mailvex
Quick Viral Notes