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 so a voice AI platform routes usage through your own provider accounts instead of billing it through the platform.
BYON lets you bring your own Plivo phone number and connect it to the voice AI platform 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.