Experimentation
Toolkit
Free, no-sign-up tools for A/B testing practitioners. Built with the same statistical rigor behind Fortune 150 experimentation programs.
Pick a Tool
CRO Readiness and ROI Calculator
Model 5%, 10%, and 20% lift scenarios, break-even lift, payback, test duration, and whether your team can execute the work.
Open toolA/B Test Sample Size Calculator
Calculate exactly how many visitors you need for a statistically valid A/B test. Uses the two-proportion z-test with Bonferroni correction for multiple variants.
Open toolTools are just the starting point
Need a full experimentation program — not just a calculator? I help growth teams build testing infrastructure that connects every experiment to revenue.
Revenue Frameworks
for Growth Leaders
Every week: one experiment, one framework, one insight to make your marketing more evidence-based and your revenue more predictable.
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Read the archive
A growing archive of experiments, frameworks, and field reports from inside a Fortune 150 growth team.
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