In a transformative move, BBVA, one of Spain's largest multinational banks, utilized Elastic's search engine technology to unify over 45 billion data points across more than 50 banking services, significantly enhancing customer experience and operational insight with sub-second response times. Initially facing challenges such as performance lags and scalability issues when Elastic was in its early stages, BBVA's strategic implementation enabled customers to access nearly 20 years of transaction history with efficient search capabilities. This shift from fragmented systems to a centralized data backbone has allowed BBVA to maintain high service levels and explore cost-effective solutions like Elastic's frozen data tier. BBVA's journey underscores the potential of Elastic's technology to evolve from a log engine into a mission-critical platform for banking operations, demonstrating its capability to handle complex financial transactions efficiently and cost-effectively.