Webyn Raises EUR 2.5M Seed Round Led by Sharpstone Capital
We have closed our Seed Round with EUR 2.5M from Sharpstone Capital to accelerate product development and expand our engineering team in Paris.
Why Your A/B Tests Take Too Long (And What to Do About It)
Fixed-horizon testing requires you to commit to a sample size before the experiment begins. Here's what that assumption costs you...
Bayesian vs. Frequentist A/B Testing: The Practical Difference
The debate isn't philosophical — it's operational. One approach lets you stop early with confidence. The other doesn't...
Multi-Armed Bandit in CRO: When It Beats Traditional A/B Tests
Thompson Sampling doesn't just find winners faster — it reduces the cost of running losers. Here are the conditions where it wins...
Three Hero Section CTA Tests That Changed Our Customers' Conversion Rates
Button text, position, and color are only the beginning. The highest-uplift tests we've seen all came down to one element...
Running A/B Tests Without Violating GDPR: A Technical Breakdown
Most testing tools store visitor identifiers in cookies. Some of those cookies require consent under GDPR. Here's how to do it properly...
The Flicker Problem: Why Client-Side A/B Testing Breaks User Experience
If visitors see the original version for 200ms before the variant loads, your test results are measuring something unintended...
Connecting A/B Test Data to Segment: A Step-by-Step Guide
Sending experiment assignments to Segment as a trait lets your entire analytics stack — from Amplitude to your data warehouse — see which variant each user saw...
Five Shopify CRO Mistakes We See in Almost Every Audit
Product page testing is the highest-value place to start for most Shopify stores. These are the errors that kill experiment validity before results come in...
Experiment Velocity: Why Running More Tests Matters More Than Running Better Tests
Companies with the highest conversion rates run 4x more experiments than average. The math behind why volume beats precision...
CRO for B2B SaaS: What's Different and What Doesn't Work
B2B conversion optimization operates on different timescales and metrics than e-commerce. The tests that move signup rates often don't move qualified pipeline...
The p=0.05 Myth: Why Statistical Significance Thresholds Are Arbitrary
The 95% confidence threshold is a convention from Ronald Fisher in 1925. Here's why it's the wrong question to ask about A/B test results...
How Page Speed Affects A/B Test Validity (And What to Check Before You Launch)
A variant that loads 400ms slower than the control will underperform even if its design is better. Here's how to catch that before it distorts your results...