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Newsletter Format Tester

emailespdaily cycle

A/B test newsletter layouts — single-column, card-grid, image-heavy, text-digest — to maximize article click-through rates.

Primary Metric

Article Click Rate

↑ Higher is better

Experiment Settings

Variants per round: 3

Max rounds: 8

Min sample size: 500

Guard Rails

Experiments auto-pause if these thresholds are breached

Max 0.3% unsubscribe rateFloor: 0.3%

Minimum 2% article click rateFloor: 2.0%