For two years we’ve been quietly running the cleanest voice stack in the business. Eight speech-to-text providers, ten text-to-speech voices, eight LLMs - swappable per agent, per minute, per call.
What we found is that latency is the whole game. Once you cross the four-hundred-millisecond threshold, a caller can’t tell the difference between your agent and a person on a slightly bad connection. Below five hundred, callers stay on the line. Above seven hundred, they hang up. We hold a median of 427ms p50 across the platform - including the round-trip to the LLM - and we publish that number every day.
Bring your own numbers from Twilio or Vonage. Bring your own scripts, your own knowledge base, your own brand voice. The platform handles inbound, outbound, qualification, transfer-on-intent, and the transcripts that land in your CRM before the call has ended.