The empathic conversational AI toolkit

EVI eliminates the robotic awkwardness of typical voice AI with ultra-low latency and human-like conversation dynamics. Lightning-fast responses and state of the art end-of-turn detection ensure that EVI doesn’t leave your users hanging or confused.

• 500-800ms end to end latency—40% faster than traditional voice systems

• Intelligent turn-taking that knows when to speak and when to listen 

• Seamless, instant interruption handling without losing conversation context

• Pauses, pacing, and timing that match human conversation patterns

Our empathic voice interface (EVI) is built on a state-of-the-art speech-language model. This allows EVI to converse quickly and fluently, understand what emotions the user is expressing in their voice, and generate any tone of voice in response. It can be interrupted at any time and can chime in at the right moments. EVI can simulate a wide range of personalities – allowing you to build custom voice AIs for any use case. Experience the most realistic AI voice.

Built on over a decade of emotion science research, EVI's speech-language model detects subtle vocal cues in the user’s voice and adjusts its responses based on the context. 

• Recognizes frustration, excitement, hesitation, and 48 other emotional expressions in speech

• Responds with appropriate tone—sympathetic, enthusiastic, or the right emotion for the situation

• Adapts its conversation style based on user engagement and emotional cues

• Optimized for user satisfaction through reinforcement learning for human expression

$0.072 per minute by default, with significant discounts at scale.

Start building with almost 300 free minutes. Jumpstart your product with three months of free usage through our Startup Grant Program or contact Sales to inquire about enterprise-level discounts.