Rexera is transforming the real estate transaction industry by using AI to automate processes, reduce costs, and minimize errors in a sector valued at $50 billion. Initially, Rexera employed single-prompt large language models (LLMs) for quality control in real estate workflows, which flagged issues but struggled with complex scenarios due to limited context. To address this, the company transitioned to a multi-agent approach with CrewAI, reducing false positives and negatives but still facing challenges in decision-making precision. Rexera then adopted LangGraph, a controllable agent framework, which improved accuracy and consistency in quality control by enabling more precise decision paths and human-in-the-loop workflows. This evolution significantly lowered error rates and enhanced the handling of complex cases like rush orders, demonstrating the effectiveness of LangGraph's structured approach in navigating real estate transactions.