AI writing tools to detect, humanize, rewrite and check grammar
Stage
Not given
Startup
Founded
2023
2026
Based in
Not given
GB
Pricing model
Freemium
Freemium
Pricing
Free plan: 200 emails. Paid plans available after free trial. Subscription plans in USD. 2 months free when choosing an annual plan. Also available on Setapp with 10-250 monthly emails depending on selected plan.
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
Key features
Automatic draft generation for incoming emails
Personalized responses in your voice and style
Intelligent Snippets knowledge base
Mobile app integration for Android and iOS
Support for 100+ languages
Edit, regenerate or delete draft messages
Intelligent email filtering
Custom API key support
Draft generation for new emails
Contact-specific personalization settings
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
What makes it different
Works automatically 24/7 generating replies waiting for approval
Seamless native Gmail integration without copying between apps
Intelligently filters meaningful emails from newsletters and promotions
Google-verified security with limited data use compliance
Privacy-first: emails not stored and AI models not trained on your data
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
Ready to Send
Coda One