Production duplex speech model for revenue calls
Hi, HN, we’re building Mia & Leo: AI personalities backed by purpose-built duplex speech models for revenue calls. Teams building real-world agents told us that more than 40% of callers hang up within the first 30 seconds. On a revenue call, that meant a lost booking, an unpaid balance, a cold lead, or a customer who does not come back. This happens because humans interrupt, correct dates, pause halfway through a sentence, or speak over someone in the background. The agent misses it, talks over them, or loses the thread. That’s because of how the current voice systems work. They sequentially…
In plain words
Mia & Leo are AI voice personalities designed for revenue calls that can listen and speak simultaneously, handling interruptions, corrections, and overlapping speech without losing conversational flow. Built on purpose-designed duplex speech models, they address the problem of callers hanging up within the first 30 seconds due to poor agent responsiveness. The system is intended for teams building real-world voice agents who need more natural, human-like call interactions that reduce dropped calls and improve booking and payment outcomes.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi, HN, we’re building Mia & Leo: AI personalities backed by purpose-built duplex speech models for revenue calls. Teams building real-world agents told us that more than 40% of callers hang up within the first 30 seconds. On a revenue call, that meant a lost booking, an unpaid balance, a cold lead, or a customer who does not come back. This happens because humans interrupt, correct dates, pause halfway through a sentence, or speak over someone in the background. The agent misses it, talks over them, or loses the thread. That’s because of how the current voice systems work. They sequentially listen, stop, think, and then speak. The conversation is actually a walkie-talkie exchange. So, we’re proud to introduce our first iteration of Mia & Leo who keep listening while they speak. They can handle interruptions, overlapping speech, corrections, and background voices without breaking the conversation. They are also built for production. Developers get control over agent behaviour, visibility into calls, failures they can debug, and costs that work at scale. Please try them out at metavoice.io. We'd love to hear any feedback!
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