Convert

Dennis van der Heijden launched Convert in the Netherlands in 2009 as a privacy-first, European alternative in the A/B testing market. Convert competed with Optimizely (VC-backed, eventually $1B+ valuation) and VWO by being bootstrapped, GDPR-compliant by design, and focused on enterprise accuracy rather than ease-of-use. Their unique positioning: for sophisticated CRO professionals who knew what they were doing and needed full control over statistical methodology, segment targeting, and multi-page experiments. Convert priced at $600-1200/month, targeting agencies and mid-market e-commerce brands running serious testing programs. The company stayed entirely bootstrapped from the Netherlands, operating profitably with a small team. Dennis became a prominent voice in the CRO community, speaking at events and publishing extensively on experimentation statistics. Revenue grew to $100k+/month. One of the most credible bootstrapped stories in a category that attracted massive VC investment — surviving and thriving by targeting the sophisticated niche that funded competitors ignored.