Buildbox is an agent analytics platform that surfaces the moments where an AI agent appears to succeed but leaves users unable to complete their task. It identifies failed user journeys, ties them to measurable business outcomes, and ranks the breakdowns by impact so teams know what to fix first. Buildbox also supports testing improved agent behaviors to generate evidence-backed fixes. The tool is aimed at teams deploying conversational or task-based AI agents who need visibility beyond standard eval scores and trace logs.