The SplitMonk Blog

Deep dives into A/B testing methodology, conversion optimization, and the engineering behind autonomous experimentation.

Why Most A/B Tests Fail (And How to Fix Yours)
A/B Testing6 min read

Why Most A/B Tests Fail (And How to Fix Yours)

95% of A/B tests end inconclusively. The problem isn't your traffic - it's your methodology. Here are the five mistakes killing your experiments.

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Michał Pogoda-Rosikoń

Founder · 2026-04-10

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10 Best CRO Tools in 2026 (Honest Breakdown From a Founder Who Tested Them All)
Product12 min read

10 Best CRO Tools in 2026 (Honest Breakdown From a Founder Who Tested Them All)

I spent 3 months testing every major conversion rate optimization tool. Here's what actually works, what's overpriced, and what I'd pick for different budgets.

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Michał Pogoda-Rosikoń

2026-04-14

How to A/B Test: The Complete Guide (With Real Examples)
A/B Testing10 min read

How to A/B Test: The Complete Guide (With Real Examples)

A/B testing isn't complicated, but most people get it wrong. Here's exactly how to run your first test - from picking what to test to reading results.

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Michał Pogoda-Rosikoń

2026-04-12

Landing Page Optimization: 7 Changes That Actually Move the Needle
Product9 min read

Landing Page Optimization: 7 Changes That Actually Move the Needle

I've optimized hundreds of landing pages. Most advice is generic fluff. Here are the 7 changes that consistently produce measurable conversion lifts.

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Michał Pogoda-Rosikoń

2026-04-08

CRO Testing: What to Test First (And What to Ignore)
A/B Testing8 min read

CRO Testing: What to Test First (And What to Ignore)

You have limited traffic and unlimited ideas. Here's the framework I use to decide what to test first - and the tests that are almost always a waste of time.

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Michał Pogoda-Rosikoń

2026-04-06

Bayesian vs. Frequentist A/B Testing: A Practical Guide
Engineering7 min read

Bayesian vs. Frequentist A/B Testing: A Practical Guide

Two statistical frameworks, one goal. We break down when to use each approach - and why the debate matters less than you think.

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Michał Pogoda-Rosikoń

2026-04-05

Split Testing vs A/B Testing vs Multivariate: Which Do You Need?
A/B Testing7 min read

Split Testing vs A/B Testing vs Multivariate: Which Do You Need?

These terms get used interchangeably, but they're different approaches with different traffic requirements. Here's when to use each one.

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Michał Pogoda-Rosikoń

2026-04-04

The Complete Guide to A/B Testing Your Website Copy
A/B Testing8 min read

The Complete Guide to A/B Testing Your Website Copy

Your copy is the highest-leverage element on your page. Here's a systematic framework for testing headlines, CTAs, and value propositions.

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Michał Pogoda-Rosikoń

2026-03-28

How We Built Zero-Flicker A/B Testing at the Edge
Engineering7 min read

How We Built Zero-Flicker A/B Testing at the Edge

Client-side A/B testing tools cause layout shift and flash of original content. We eliminated both by moving variant injection to Cloudflare Workers.

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Michał Pogoda-Rosikoń

2026-03-20

Case Study: How a SaaS Startup Increased Signups by 41% with AI Copy Testing
Case Studies5 min read

Case Study: How a SaaS Startup Increased Signups by 41% with AI Copy Testing

A B2B SaaS company was stuck at a 2.3% conversion rate. Three rounds of AI-generated copy tests pushed it to 3.2% in six weeks.

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Michał Pogoda-Rosikoń

2026-03-15

Statistical Significance in A/B Testing: What It Actually Means
Product6 min read

Statistical Significance in A/B Testing: What It Actually Means

P-values, confidence intervals, significance levels - decoded for product teams. No PhD required.

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Michał Pogoda-Rosikoń

2026-03-10