BYON (Bring Your Own Number)
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.
BYON stands for Bring Your Own Number. In voice AI, BYON lets you use phone numbers you already have — via Twilio, Vobiz, Exotel or any other carrier — with the voice AI platform, instead of renting a number from the platform directly. This is important for Indian deployments because of DLT (TRAI) registration requirements, and for enterprises that already have a carrier relationship they want to keep. ThinnestAI supports BYON via SIP trunk integration.
Why BYON matters in India
Indian phone numbers have TRAI DLT registration requirements for commercial use. If your business already has DLT-registered numbers on Twilio, Vobiz or another Indian carrier, you can plug them into ThinnestAI via BYON instead of going through the DLT registration flow again.
BYON vs rent-from-platform
If you are just starting out and do not already have phone numbers, it is simpler to rent from the platform. BYON is better when you have existing carrier relationships, bulk pricing, specific compliance requirements, or numbers that are already on your DLT registration.
Supported BYON carriers on ThinnestAI
Twilio (global) and Vobiz (India) BYON are supported natively. Exotel SIP trunk BYON is available on request.
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.
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.
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.
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.