In a rapidly evolving digital landscape, the integration of real-time data processing with Large Language Models (LLMs) is becoming essential for industries like FinTech, where timely insights are critical. DeltaStream emerges as a pivotal solution, providing a serverless platform that integrates streaming, real-time, and batch analytics, enabling the seamless ingestion, processing, and delivery of real-time data for LLMs. This infrastructure allows LLMs to maximize their potential by operating on current, context-rich data, thus enhancing accuracy and relevance in applications such as personalized financial advice. With features like streaming-first ingestion, unified data processing, and real-time materialized views, DeltaStream ensures low-latency responses, thereby transforming the traditional static data handling into dynamic, real-time decision-making. This paradigm shift not only elevates customer engagement through instant, context-aware solutions but also positions DeltaStream as a cornerstone for building sophisticated, low-latency LLM-powered applications in a world that increasingly demands immediacy.