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Free A/B Test Library

Learn from real-world
A/B tests.

Search original portfolio studies, failure patterns, A/B test examples, and practitioner guides built to survive a test-intake review—not just inspire another redesign.

142source records audited
139canonical experiments
3original studies live
How to read the library

Not every idea has the same evidence.

01

Portfolio synthesis

Patterns or operating lessons drawn across many records, with limitations stated.

02

Repeated pattern

A mechanism observed more than once, useful as evidence—not a guarantee of lift.

03

Research-backed idea

A testable direction supported by evidence but still requiring validation in context.

Search the evidence

Find a defensible starting point.

Filter by the surface you are testing or the kind of evidence your intake process needs.

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Take the evidence into your workflow.

Every original study includes a copyable Evidence Pack: hypothesis, metric, guardrails, applicability, risks, and a permanent citation. Use it as the research layer in your own experiment brief, then find related tests in GrowthLayer.

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