Case Study: Fyxer scaled experimentation to grow from $1M to $35M ARR
Key results
The challenge
Fyxer, a UK-based AI assistant for email and scheduling, treated experimentation as core to how it operates. The team needed a way to measure the impact of pricing, onboarding, and AI product changes rather than shipping reasonable-sounding ideas to 100% of users without evidence.
The solution
Fyxer used GrowthBook as its experimentation backbone, running A/B tests across pricing, onboarding, product-led growth loops, usage limits, messaging, and core AI product experiences with a four-person growth team.
“Experimentation is core to how Fyxer runs. GrowthBook gives us a way to measure what's happening, learn from wins and losses, and avoid shipping every risky idea to 100%.”
KJKameron JenkinsHead of Growth Engineering, Fyxer
The results, in context
Over one year Fyxer ran 541 A/B tests and grew from $1M to $35M ARR. Individual wins included lifting free-to-paid conversion from 5% to 35% via a credit-card gate before the free trial, a 50% reduction in annual-plan churn, and a 65% increase in trial starts for personal-email users. The team reported that only about 25% of experiments were winners, with compounding learning driving the growth.