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Email CTA Button Tester

emailespdaily cycle

A/B test CTA button text, color, and placement within HTML emails to maximize click-through rates.

Primary Metric

Click-Through Rate

↑ Higher is better

Experiment Settings

Variants per round: 4

Max rounds: 8

Min sample size: 500

Guard Rails

Experiments auto-pause if these thresholds are breached

Minimum 0.5% CTRFloor: 0.5%

Max 0.5% unsubscribe rateFloor: 0.5%