Voice AI
Voice AI is the umbrella term for AI systems that understand and generate human speech in real time — powering voice assistants, phone agents, voice chatbots and real-time 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-powered system that has real-time spoken conversations — over a phone call, a web widget or a SIP trunk — using speech recognition, a language model and speech synthesis.
Conversational AI is the category of AI systems designed to interact with humans in natural language, across chat, voice, email and messaging — using NLU, LLMs and tool-calling to hold multi-turn conversations that actually accomplish work.
IVR is a rigid scripted decision tree (press 1 for sales). Voice AI is a natural-language agent that understands free-form speech, uses LLM reasoning, and calls tools to take real actions.
BYOK means you bring your own API keys for the LLM, STT and TTS providers, and the voice AI platform routes usage through your accounts instead of bundling the provider costs into its own pricing.
BYON means you bring your own phone number — via a Twilio, Vobiz or Exotel account — and connect it to the voice AI platform via SIP, instead of renting a number from the platform itself.
SIP trunking is the protocol that lets a voice AI platform send and receive phone calls over the internet, connecting to the public phone network via a carrier like Twilio or Vobiz.