Know which headline wins before you spend traffic on it.
AI prompts that finish the job
Stage
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Freemium
Pricing
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.
Free: 12 workflows and one free weekly email prompt. BuffNerf Prompt Pack: US$9 one-time for 72 prompts.
Key features
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