How Preply runs close to 1,000 experiments a year

The Experimentation Edge · Nov 3, 2026 · 32m · transcript

Summary

Sebastien Polis, Senior Experimentation Manager at Preply, joins host Ashley Stirrup to explain how a learning marketplace with 25 to 30 product teams runs close to 1,000 experiments a year. At Preply, no change reaches customers without a test, OKRs can only be claimed through experiments with an approved target metric, and a public Slack channel puts every launch, result and kill decision in front of the exec team.

Sebastien shares why roughly 80% of experiments lose and 30 to 40% are iterations of an earlier idea, how a global control group shows double-digit growth, and what…