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Fonoster vs Millis AI

People

FonosterAI Voice Agents

Millis AIAI Voice Agents

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Price

Usage-based

AI Voice Agents

Annual estimate10 people, entry price

Usage-based

Offer

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AI Voice Agents

Overview

Focus

AI Voice Agents

Product

Open-source voice and AI telephony infrastructure for building programmable voice agents and SIP applications.

Voice AI platform with ultra-low latency conversation APIs for real-time phone agents.

Website

Headquarters

San Francisco, California

Company size

11-50 employees

2-10 employees

Founded

2020

2023

Pricing details

Published rate

Usage-based

Free options

Free plan, Free trial

Source updated

Oct 29, 2026

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