Experimentation
Toolkit
Free, no-sign-up tools for A/B testing practitioners. Built with the same statistical rigor behind Fortune 150 experimentation programs.
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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 Planning
Learn which assumptions determine a defensible sample size, then open GrowthLayer’s unified planner for the calculation and experiment handoff.
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.
Make Growth Decisions
You Can Defend
Know what to test, when to trust the result, and what to do next. Practical decision guides for analysts, growth teams, and founders.
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Read Better Decisions
Practical guides on experimentation, analytics, commercial judgment, and using AI without outsourcing the decision.
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