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Relay.app is a workflow automation tool that introduces the concept of "Human-in-the-Loop." Unlike Zapier, which is designed to run completely in the background, Relay is built for processes that require human judgment, such as approving a refund or reviewing a contract. It allows you to pause an automated workflow, ask a human for input (via a simple UI), and then continue the automation based on their answer. It also features "AI Steps" that can summarize data or classify emails before a human sees them. For operations teams, Relay bridges the gap between rigid automation and manual work. It ensures that you can automate the boring parts of a process without losing the necessary oversight on critical decisions.