AI writing tools to detect, humanize, rewrite and check grammar
Turn Substack articles into viral social posts
Stage
Startup
Startup
Founded
2026
2025
Based in
GB
Not given
Pricing model
Freemium
Freemium
Pricing
Free: unlimited AI Detector, 3 daily uses on writing tools, 5 of 9 humanizer modes, 5 of 8 rewriter tones. Starter $9.99/mo (or $7.99/mo annually): 30K words/month, every humanizer and rewriter mode, 500 words per process. Pro $19.99/mo (or $15.99/mo annually): 100K words/month, no per-request word
Free: 10 credits (one-time). Monthly: $7/mo for 70 credits. Yearly: $65/yr for 600 credits.
Key features
Unlimited free AI detector with no daily limit or signup required
AI Humanizer with 9 writing modes including Standard, Academic, Blog, Formal, and Simple
Statistical detection engine that processes text on own servers with no third-party sharing
AI Rewriter with 8 different tones
Grammar Checker tool included in all plans
Chrome Extension for in-browser humanizing and detection
Brand Voice feature for maintaining consistent tone across 1-3 voices depending on plan
Re-humanize function to generate genuinely different drafts at higher variation
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
Unlimited free AI detector with no daily limits, while competitors limit guests to 3 scans per day
Published accuracy rates with measured false-positive and false-negative rates instead of unverifiable claims
Integrated detect-then-fix workflow keeping flagged drafts in one tool instead of switching between products
Privacy-first approach with AI Detector processing text on own servers with no third-party access
Browser-first start with no extension setup or account creation required before first use
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
Coda One
Quick Viral Notes