Plausible Analytics is a lightweight, open-source web analytics tool that prioritizes user privacy by not using cookies and being fully compliant with GDPR. The platform has gained popularity among 5000+ paying subscribers, tracking over 1 billion page views per month. To handle this growth, the team switched to ClickHouse, which significantly improved loading speed and performance, allowing them to serve their largest customers without issues. The switch was deemed a best technical decision by the founders, enabling Plausible Analytics to achieve its current success and continue growing.