Zelto analyzes every call from a voice AI deployment and groups recurring failures into Findings, drafting a fix for each so teams tackle the issues affecting the most callers first. It ingests calls, transcripts, messages, LLM traces, and logs, then runs evaluators that extract signals like caller frustration, knowledge gaps, and tool call failures. A chat interface answers questions about agent performance and sets monitors with Slack alerts. Zelto connects through native integrations with voice platforms or a single API.