Voice AI
Voice AI is the umbrella term for AI that understands and generates human speech in real time — powering voice assistants, phone agents and translation.
Voice AI is the category of artificial intelligence that understands and generates human speech. It combines automatic speech recognition (ASR / STT), natural language understanding via large language models, and text-to-speech synthesis to enable real-time spoken interactions between humans and machines. Voice AI powers phone agents, smart speakers, in-car assistants, voice chatbots, real-time translation and accessibility tools.
Voice AI vs chat AI vs generative AI
Voice AI is a subset of AI that adds spoken input and output to what chat AI already does. A chat AI agent and a voice AI agent can share the same LLM and tools — the only difference is that voice AI adds STT on the input and TTS on the output, with a much stricter latency budget.
Real-time vs batch voice AI
Real-time voice AI (phone agents, voice assistants) has to respond within a few hundred milliseconds. Batch voice AI (call transcription, voicemail summarization, podcast indexing) can take seconds or minutes and optimizes for accuracy instead.
India-specific considerations
Voice AI in India has to handle 22 scheduled languages, code-switching (especially Hinglish), regional accents, and cost sensitivity. Not every global voice AI provider handles Indian languages at production quality — opinionated routing to Indic-specialized providers (like Sarvam) meaningfully outperforms a generic multilingual model for Hindi, Marathi, Tamil, Telugu and Bengali.
More definitions
A voice AI agent is an AI system that holds real-time spoken conversations via phone, web or SIP — combining speech recognition, an LLM and speech synthesis.
Conversational AI is the category of AI that interacts with humans in natural language across chat, voice, email and messaging — using NLU, LLMs and tools.
IVR is a rigid scripted tree (press 1 for sales). Voice AI is a natural-language agent that understands free-form speech, reasons and calls tools.
BYOK lets you bring your own LLM, STT and TTS API keys — the voice AI platform routes usage through your accounts instead of bundling provider costs.
BYON lets you bring your own phone number — via Twilio, Vobiz or Exotel — and connect it to the voice AI platform via SIP instead of renting one.
SIP trunking lets a voice AI platform send and receive phone calls over the internet, connecting to the PSTN via a carrier like Twilio or Vobiz.