Know which headline wins before you spend traffic on it.
Stage
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Founded
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Based in
US
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Pricing model
Freemium
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Pricing
Free plan at $0/month with basic writing features and limited AI allowance. Plus plan at $9/month with unlimited docs, encrypted cloud backups, external connections, and x5 more AI usage. Pro plan at $29/month with all Plus features plus multi-agent mode and x15 more AI usage, marked as Best value.
Free: $0/month with 5 rankings and 60 Claude-written options monthly. Creator: $19/month with 100 rankings and 2,500 options. Pro: $49/month with 600 rankings and 6,000 options. Agency: $149/month with 3,000 rankings and 20,000 options.
Key features
Intelligent AI assistant with chat, edit and write capabilities
True offline experience with local file storage
Web research and image generation
Deep mode for complex creative tasks
Multi-agent mode for collaborative AI
Import and export multiple file formats
Encrypted cloud backups
Page and pageless document viewing modes
External connections for integrations
Head-to-head comparison of up to 200 variants
Bradley-Terry model ranking with calibrated odds
Honest uncertainty verdicts: Clear, Lean, Too close to call
Brand profiles to calibrate accuracy on your audience
Works for YouTube titles, subject lines, ad headlines, and article headlines
Accuracy measured on 9,841 held-out A/B tests
What makes it different
Keeps your files locally on your machine instead of on company servers
Combines offline-first document editing with integrated AI without tab-hopping
Works with your existing file formats and imports from popular platforms
Fast performance for large documents with flexible viewing options
Designed for writers and thinkers who care about word quality
82% accuracy on clear calls, trained on thousands of real A/B tests never seen during tuning
Honest about uncertainty instead of always crowning a winner
56 times cheaper than Claude Sonnet while maintaining comparable accuracy
Custom calibration to your audience's behavior via brand profiles
Compare versions in both orders to cancel out model bias