QA for your ElevenLabs agents
A world-class voice makes every answer sound right — including the wrong ones. Zelto grades what your ElevenLabs agent actually said, on every production call, and hands you the fix when it breaks.
What actually breaks on ElevenLabs in production
Dashboards show you that calls happened. They don't show you the calls that quietly failed — and those are the ones that cost you customers.
Convincing wrong answers
The voice is flawless, the content isn't. Wrong prices, invented policies, confident answers to questions outside the knowledge base. Polished delivery makes these failures harder to catch, not easier. Zelto grades the substance.
Knowledge base misses
The answer exists in your docs, but the agent doesn't retrieve it — or retrieves the wrong section. Zelto clusters every call where the agent failed the same question, so you know exactly which gap to fill.
Tool failures behind a smooth voice
A booking or lookup fails mid-call and the agent glides past it. The caller never knows; neither do you. Zelto flags every call where a tool failed and the conversation continued as if it hadn't.
Regressions after prompt or KB updates
Every knowledge base edit and prompt tweak can shift behavior. Zelto grades continuously, so a regression shows up as a Finding tied to the change — with the calls that prove it.
How Zelto works with ElevenLabs
Connect
Connect your ElevenLabs account and Zelto ingests conversations as they complete — audio, transcripts, and metadata. No changes to your agents.
Zelto listens and diagnoses
Every production call is graded against a rubric Zelto auto-learns from your traffic — your domain, your language, your definition of a good call. No setup, no scorecard to write.
Findings, with the fix drafted
Calls that fail for the same reason are clustered into one Finding, ranked by volume, with example calls, a drafted prompt fix, Slack alerts, and an optional Linear ticket.
Production traffic, not simulations.
Simulation tools grade synthetic conversations against scenarios you wrote. Zelto grades what actually happened with real callers on your ElevenLabsagents — because that's where the failures that matter live. Most teams are integrated in under 15 minutes.
Zelto + ElevenLabs
The questions teams ask before connecting. Answered honestly.
Other integrations
One week. One agent. Ten findings
Connect one production agent. Zelto listens, then walks you through ten findings with severity, examples, and fixes.
Book a demo