Skip to main content

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.

138 experiments
Winners, losers & inconclusive
Full statistical details
inconclusive

Product: Bottom Or Left Thumbnails

Context: Visual elements on the product aren't doing enough to communicate value, build trust, or guide users toward the next step.

ImageryCross-Industry
inconclusive

Signup: Vague Or Specific Benefits

Context: The registration experience on the signup asks too much too soon, causing potential users to drop off.

Copy & MessagingCross-Industry
inconclusive

Checkout: Standard Or Superscript Price Format

Context: How prices are displayed on the checkout directly influences perceived value and willingness to buy.

FormCross-Industry
inconclusive

Signup: Right Or Left Aligned Forms

Context: The registration experience on the signup asks too much too soon, causing potential users to drop off.

FormCross-Industry
inconclusive

Home landing: Visible Or Hidden Offer Pages

Context: Multi-step processes on the home landing can overwhelm users if they can't see how far along they are or how much is left.

PricingCross-Industry
inconclusive

Product: Registration Flow Change

Context: The registration experience on the product asks too much too soon, causing potential users to drop off.

Social ProofCross-Industry
inconclusive

Product: One Time Payment Copy

Context: How prices are displayed on the product directly influences perceived value and willingness to buy.

PricingCross-Industry
inconclusive

Listing: Product Availability

Context: Multi-step processes on the listing can overwhelm users if they can't see how far along they are or how much is left.

LayoutCross-Industry
inconclusive

Checkout: Optional or Confident Recommendation

Context: Friction during the checkout process causes users to abandon right when they're closest to converting.

LayoutCross-Industry
inconclusive

Product: Product Categories

Context: Users can't quickly find relevant products or content on the product, leading to frustration and early exits.

LayoutCross-Industry
inconclusive

Product: Earliest Availability

Context: Multi-step processes on the product can overwhelm users if they can't see how far along they are or how much is left.

LayoutCross-Industry
inconclusive

Listing: Visible Filters

Context: Users can't quickly find relevant products or content on the listing, leading to frustration and early exits.

NavigationCross-Industry
inconclusive

Product: Page Level Navigation

Context: Users arriving at the product can't efficiently find what they're looking for, increasing bounce rates.

NavigationCross-Industry
inconclusive

Product: Product Descriptions

Context: Multi-step processes on the product can overwhelm users if they can't see how far along they are or how much is left.

LayoutCross-Industry
inconclusive

Product: Square or Rounded Buttons

Context: The primary call-to-action on the product isn't converting at its potential — design, copy, or placement may be the bottleneck.

CTACross-Industry
inconclusive

General: Commonly Used Metrics Are Poor Predictors of Business Impact

Principle: Always tie test metrics to a revenue or retention outcome. Vanity metrics (CTR, bounce rate) are easy to move but rarely correlate with business results. Use downstream metrics wherever possible.

MeasurementCross-Industry
inconclusive

General: Test Quality Peaks at 1–10 Annual Tests Per Engineer; Drops 87% After 30

Principle: Use a prioritization framework (PIE, ICE, or custom scoring) before building a test. Quality hypothesis generation matters more than raw test velocity.

Testing StrategyCross-Industry
inconclusive

Homepage: Meta: Top Homepage CRO Patterns

Principle: The highest-ROI tests on homepages are usually structural (CTA placement, sticky nav, multi-step forms) rather than content changes. Copy matters most for nav labels and CTAs. Social proof works for social platforms but can backfire for professional services. Carousels consistently underperform static alternatives.

Testing StrategyCross-Industry

Stop Re-Running Failed Tests

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

Browse Experiments By

Comparisons

Popular Combos

Explore More