Millis AI

Automate customer support and sales calls with ultra-low latency voice agents that respond in 500ms, providing human-like interactions across 100+ countries.

Paid voice bot creation

Starting at

$0.02/minute

About Millis AI

Millis AI is a specialized platform for developing high-performance, conversational voice agents powered by large language models. Its primary objective is to solve the latency issues that often plague AI-driven voice interactions, offering a response time of approximately 500ms. By minimizing these delays, the platform enables more natural, human-like conversations suitable for real-time applications. The system is designed to handle both inbound and outbound telephony, providing businesses with the ability to connect and manage phone numbers across more than 100 countries. The technical framework of Millis AI is built around flexibility and integration. It provides a no-code/low-code environment that allows users to quickly configure agents and connect them to external workflows via tools like Make.com. A significant feature is the "Bring Your Own" model approach, where developers can choose from popular LLMs like OpenAI’s GPT-4o, open-source models like Llama-3, or even their own custom-hosted models. This extensibility extends to voice synthesis, with native support for premium providers such as ElevenLabs, PlayHT, and Cartesia, as well as the ability to use cloned voices for brand consistency. The platform is ideally suited for organizations looking to scale their communication capabilities without increasing headcount. Customer service departments can utilize these agents to provide 24/7 support for routine questions, while sales teams can automate the initial stages of lead qualification and appointment setting. Additionally, software developers can leverage the Millis AI SDKs to embed voice functionality directly into web, mobile, or desktop applications, or even into standalone voice-enabled hardware devices. What distinguishes Millis AI from other conversational AI platforms is its granular control over the tech stack and its transparent pricing. Instead of a rigid subscription, it uses a pay-as-you-go model that combines a base platform fee with specific costs for speech-to-text, text-to-speech, and language model usage. The platform also includes an optimization feature called "Choose By Millis," which automatically selects the LLM configuration that will yield the lowest possible latency for a given task, ensuring consistent performance without manual tuning.

Millis AI pros & cons

Pros

Industry-leading 500ms latency for natural-feeling conversations.
Supports a wide array of third-party LLM and TTS providers for maximum flexibility.
Allows users to integrate their own custom LLMs without extra platform fees.
Provides seamless automation capabilities through Make.com integration.
Offers global reach with phone number support in over 100 different countries.

Cons

Complexity in pricing due to variable third-party provider fees for LLM and TTS.
Requires technical knowledge to implement SDKs for web and mobile deployment.
The platform charge is strictly usage-based with no flat-rate subscription option.

Millis AI use cases

Customer Support Managers can automate 24/7 routine inquiries using AI voice agents to reduce human agent workload.
Sales Teams can deploy outbound agents to qualify leads and schedule follow-up calls automatically across 100+ countries.
Product Developers can integrate natural-sounding voice interfaces into apps using the provided SDKs and embeddable widgets.
Market Researchers can use AI agents to conduct automated surveys and gather feedback from customers over the phone.
Virtual Assistant creators can build highly responsive agents that mimic human conversation speeds using the 500ms latency feature.

Millis AI features

voice cloning
multi-llm support
web & mobile sdks
100+ countries phone support
make.com integration
no-code/low-code builder
inbound and outbound telephony
500ms ultra-low latency

Millis AI pricing

Is Millis AI free? No, Millis AI doesn't offer a free plan; pricing starts at $0.02 / minute.

Usage-Based

$0.02 / minute

500ms ultra-low latency
100+ countries phone support
Make.com integration
Custom LLM support
Web/Mobile/Desktop SDKs
Embeddable call widget
Inbound and outbound calls
Voice cloning support
Function calling API
Dynamic variables

Millis AI FAQs

What is the latency of Millis AI voice agents?

Millis AI offers ultra-low latency of approximately 500ms, which is among the fastest on the market. This ensures that conversations between the AI and the user feel fluid and natural without significant delays.

Can I use my own LLM with Millis AI?

Yes, Millis AI allows you to connect to top providers like OpenAI or open-source models like Mistral and Llama. You also have the option to bring your own custom LLM model at no additional platform charge.

How does the pricing for Millis AI work?

Pricing is based on usage, starting with a base platform charge of $0.02 per minute. Additional costs depend on the chosen LLM, TTS provider, and a standard STT rate of $0.0043 per minute.

Does Millis AI support international phone numbers?

The platform allows you to connect phone numbers for inbound and outbound calls in over 100 countries. This makes it suitable for global customer support and international sales operations.

Which voice providers are supported?

Millis AI integrates with several natural voice providers, including ElevenLabs, PlayHT, Cartesia, and OpenAI. Users can also bring their own cloned voices to give agents a unique sound.

Ratings & reviews

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