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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.

260 experiments
Winners, losers & inconclusive
Full statistical details
inconclusive

Product: Faded Background Form

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.

FormCross-Industry
inconclusive

General: Product Size References

Context: Visual emphasis on the general may not be drawing attention to the right elements — size, color, and contrast guide the eye.

LayoutCross-Industry
inconclusive

Signup: Blurred Product Background

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

ImageryCross-Industry
inconclusive

Checkout: Countdown Timer

Context: Without clear urgency signals, users delay their decision on the checkout, leading to drop-offs and abandoned sessions.

Social ProofCross-Industry
inconclusive

Product: Long Titles

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.

Copy & MessagingCross-Industry
inconclusive

General: Auto Focused Form Field

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

FormCross-Industry
inconclusive

Checkout: Benefit Bar

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

Copy & MessagingCross-Industry
inconclusive

Checkout: Checkout Flow Simplification

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

PricingCross-Industry
inconclusive

General: Benefit-Lead Labels

Context: Form input design on the general affects completion rates — label placement, validation timing, and field clarity all matter.

FormCross-Industry
inconclusive

Product: Video Testimonials

Context: Users on the product need validation from others before committing — without visible proof of success, they hesitate.

Social ProofCross-Industry
inconclusive

Checkout: Above The Fold Call To Action

Context: The first screen of the checkout must immediately communicate value — if it doesn't, users bounce before scrolling.

CTACross-Industry
inconclusive

Thank you: Autoplay Video

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

ImageryCross-Industry
inconclusive

Product: Shortcut 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

Product: How It Works

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

LayoutCross-Industry
inconclusive

Home landing: Problem-Solution Headline

Context: The headline on the home landing may not resonate with what users actually care about or address their top objections.

Copy & MessagingCross-Industry
inconclusive

Product: Buy Now Or Smaller Commitment Button

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

Product: Conversational Filters

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

Copy & MessagingCross-Industry
inconclusive

Listing: Hover Button

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

CTACross-Industry
winner

Content Page: Maybe Later

Problem: How "Maybe later" is implemented on the content page can meaningfully affect conversion — this element is worth testing.

LayoutCross-Industry
winner

Does Pinning a Mobile Checkout CTA Improve Conversion?

Sticky mobile CTAs can compress time-on-page meaningfully (~15% faster) without sacrificing engagement signals — users converted at a directionally higher rate AND moved through the page faster, suggesting reduced hesitation rather than rushed clicks. The result was shipped via 90/10 holdout monitoring rather than traditional 50/50 A/B inference — the high baseline (~85%) and limited mobile traffic made full A/B underpowered, so the team chose a holdout-validated rollout as the deliberate methodology. Bayesian P(variant > control) was ~0.90, supporting the directional ship call. Worth noting: external research flags sticky CTAs as context-dependent — they help when the primary action is buried below the fold, but can hurt on shorter pages where the original CTA is already visible.

CTAEnergy & Utilities

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