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Stop manually reviewing voice AI calls
Zelto listens to every production call, pinpoints where your agents fail, and tells you exactly what to fix.
Get a DemoWorks with your stack







- Custom / API







- Custom / API
How it works
From call to improvement in three steps.
- 01
Connect
One-click integration with Vapi, Retell, LiveKit, or any provider via API.
- 02
Listen
Audio and transcripts run through multiple analyses to catch frustration, audio errors, and other failure signals.
- 03
Improve
Failures, friction, and concrete fixes surfaced in one dashboard.

Voice AI debt collection startup
“Zelto reduces the time our engineers and solution architects spend reviewing calls, now they can focus on making the agent for our customers better.”
Diego Sanchez
CTO & Founder, Mozart
Stop reviewing calls. Start shipping improvements.
Book a call with the founders — we'll analyze one of your agents for free.
Get a Demo
Founders INC Canopy