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The A/B Test Library

Real experiments. Real outcomes. Actionable patterns. Browse A/B tests with problem-to-solution framing, results, and recommendations for what to test next.

21 experiments
Winners, losers & inconclusive
Full statistical details
winner+10.5%

Signup: Right Or Left Aligned Forms

Problem: Each additional form field adds friction to the signup, increasing the chance users abandon before completing their submission.

FormE-commercen=6,674

Stop Re-Running Failed Tests

Build on what's already been learned. Save your own experiments, surface winning patterns, and make every test count.

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