Case Study: Rex automates order-to-cash operations with Braintrust

Rex ships improvements in 30 minutes with Braintrust

Rex, an AI-native service for accounts receivable teams, faced the challenge of automating its order-to-cash process with no visibility into its AI agents' decisions. This lack of transparency made model swaps high-risk and debugging a slow, manual process. Rex partnered with Braintrust to gain the necessary insight and confidence in its operations.

By implementing Braintrust, Rex gained the ability to trace every agent touchpoint. This enabled them to write evals for confident model selection and use the platform's Topics feature to continuously surface issues. The solution allowed Rex to ship improvements in just 30 minutes and use overnight coding agents to automatically investigate negative feedback, turning it into ready-to-merge fixes by morning.

Rex