Khatabook, a leading Indian fintech company (YC 18), replaced Mixpanel with Mitzu and Segment with RudderStack to manage its massive scale of over 4 billion monthly events, achieving a 90% reduction in both data ingestion and analytics costs. By adopting a warehouse-native architecture centered on Snowflake, Khatabook enabled real-time, self-service analytics across teams while maintaining 100% data accuracy.