SEO Innovation Lead at Follo AgencyHi, my name is Koen Leemans.
I’m SEO Innovation Lead at Follo Agency, where I work on SEO testing, data analysis and automation. I also build practical tools for everyday SEO work, from splitting test groups to forecasting traffic. You can use them here for free.
Tools
Free tools for planning, measuring and forecasting SEO changes.
SEO A/B Test Analyzer
Estimate how an SEO change affected traffic by comparing changed pages with a control group.
SEO A/B Page Splitter
Split pages into test and control groups with similar traffic levels and trends.
GSC Experiment Analyzer
Compare clicks, impressions, CTR and position before and after an SEO change. Add unchanged pages as a control group.
SEO Traffic Forecaster
Estimate future search traffic from GSC or CSV data. View daily and monthly totals and check how accurate past predictions were.
PageRank Calculator
Calculate internal PageRank from a Screaming Frog internal links export.
PAA Generator
Draft answers to People Also Ask questions.
Recent Articles
SEO split-test results, published on the Semrush blog.
ChatGPT-Generated FAQs Enriched with FAQPage Schema
We used ChatGPT to generate FAQs for an ecommerce website and tested the impact of FAQ rich results.
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SEO Split-Test and Analyze FAQPage Structured Data (Yourself)
Set up an SEO split test for FAQPage structured data and measure the traffic change with the analyzer.
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The Impact of ItemList Structured Data on Listing Pages
We tested whether adding ItemList structured data to listing pages changed organic traffic.
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