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cxl.com

2 resources from cxl.com we point founders to, and the questions each answers.

📄 Article

Free Intermediate

The most rigorous free explainer on running valid tests without fooling yourself with noise - essential reading before you're tempted to call a test 'significant' after 40 conversions.

What Is A/B Testing? The Complete Guide: From Beginner to Pro

From cxl.com by CXL

Calculate sample size ahead of time rather than eyeballing a dashboard - a rough rule of thumb is 350+ conversions per variation before trusting a result.
Conversion research, not guessing, is what generates test ideas actually worth running.
Test the biggest friction point you can find, not the ten-minute button-color change.

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Answers I barely get 500 visits a week. What should I A/B test first, and can I even trust the results?

🎓 Course

Paid Advanced

The closest thing to a structured, practitioner-built curriculum in CRO - 20 courses across research, testing and psychology for a founder ready to move past ad-hoc fixes into an actual testing program.

Conversion Optimization Minidegree

From cxl.com by CXL Institute

Covers conversion research methodology, A/B testing statistics and behavioural psychology across roughly 20 courses.
Built for marketers and growth leads who want to run a real experimentation program, not just one-off tests.
A genuine time and money investment - worth it once you have enough traffic to actually run tests on.

Open cxl.com →

Answers I barely get 500 visits a week. What should I A/B test first, and can I even trust the results?

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