AI writing tools to detect, humanize, rewrite and check grammar
AI writing critique tool for serious authors
Stage
Startup
Not given
Founded
2026
Not given
Based in
GB
Not given
Pricing model
Freemium
Not given
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
Core Plan: $19/month (200,000 words of editing per month, limited rewriting ability). Pro Plan: $29/month (300,000 words of editing per month, able to rewrite entire chapters and books). A one-time free word sample is available for new accounts.
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
Sentence-level literary feedback
Paragraph-level literary feedback
Passage-level literary feedback in context
Chapter-level literary feedback in context
Book-level literary feedback in entire context
One-click text rewriting with AI
Entire chapter rewriting on Pro Plan
Entire book rewriting on Pro Plan
300,000-word context window on Pro Plan
Progressive learning through interactive Q&A
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
Human book editors charge thousands but AI Book Editor starts at $19 per month
Gives almost immediate feedback while human editors take weeks
300,000-word context window three times more than average novel
All output belongs 100% to the user for commercial use
Coda One
AI Book Editor