VOICE ENGINES

Voices that don't sound like software.

Four production voice backends, one switch. Pick native speech-to-speech for instant reactions, or a cascade pipeline for maximum control.

DEFAULT · BEST VALUE

S2S NATIVE

The fast, low-cost default — instant speech-to-speech reactions with built-in VAD and Krisp noise cancellation.

Reasoningminimal – high

Voices30+ voices

Voice quality9.0/10

Price$0.08/min

S2S NATIVE

Reasoning-grade speech-to-speech with steerable, expressive delivery — best when logic and nuance both matter.

Reasoningminimal – xhigh

Voices11 voices

Voice quality8.8/10

Price$0.15/min

S2S NATIVE

Internal reasoning at zero added latency — best for fast-moving, objection-heavy conversations.

ReasoningNative

Voices8 voices

Voice quality9.2/10

Price$0.15/min

CASCADE S2S

Ink STT → GPT-OSS-120B → TTS pipeline with semantic VAD and expressive voice tags for maximum control.

Reasoninglow – high

Voices600+ voices

Voice quality9.5/10

Price$0.07/min

Dozens of voices. Pick a personality.

Audition any voice on any engine right here — press play, then take your favorite straight to a live test call.

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Run a live test call and switch voices mid-flight until it sounds right.