What does an AI voice agent cost in India?

What does an AI voice agent cost per minute?

A voice agent has four running parts: speech-to-text, a language model, a voice, and the phone line. Some vendors bundle all four into one rate, some bundle three, and developer platforms bill each part separately. Compare like with like. Every price below is the vendor's own published figure, read on 9 November 2026. USD conversions use Rs 95.25 to the dollar, the RBI reference rate for 6 November 2026, and are our arithmetic⁷.

• Ringg AI: Rs 6 a connected minute in India, or $0.10 in the US, telephony included; number Rs 499 a month; extra capacity Rs 1,995 per block of five concurrent calls¹.
• Bolna AI: $0.06 a minute, about Rs 5.52, falling to about 4.2 US cents on its pilot plan of $500 for 12,000 minutes; telephony and platform fee extra².
• Smallest.ai: $0.09 to $0.21 a minute depending on the models, about Rs 8.60 to Rs 20⁸⁷.
• Retell AI: $0.07 to $0.31 a minute, about Rs 6.70 to Rs 29.50³⁷.
• Vapi: $0.05 a minute for hosting, with speech, model and voice passed through at cost. Its own estimate for 1,000 minutes is $50 hosting, $10 speech-to-text, $8 to $45 for the model and $15 to $24 for the voice, so about $83 to $129, roughly Rs 7,900 to Rs 12,300, before the phone line⁹⁷.

What does the phone line add?

If your platform does not include telephony, you pay a calling provider too. Plivo lists Indian domestic calls at Rs 0.38 a minute either way, billed in 30-second pulses, and a domestic number at Rs 200 a month⁴. Twilio lists calls to Indian numbers at $0.0699 a minute for landlines and $0.0496 for mobiles¹⁰. Vapi's page lists Twilio at $0.008 a minute inbound and $0.014 outbound as a transport option⁹.

The 30-second pulse matters for short calls. A 40-second call is billed as one minute on that basis, our reading of Plivo's billing note⁴.

What would 1,000 minutes a month cost?

At Ringg's listed rate, 1,000 connected minutes cost Rs 6,000 plus Rs 499 for the number, telephony included¹. At Bolna's listed rate the agent part is $60, about Rs 5,520, before telephony and its platform fee². On Retell the same minutes run $70 to $310³, and on Vapi about $83 to $129 before the line⁹. These are our calculations from published rates. Add 18 percent GST where the vendor bills in India, as SOT Labs does on its prices¹¹.

The per-minute bill is rarely the biggest cost. Someone has to write the call flow, connect your calendar or CRM, test it with real callers in your languages, and fix it when it goes wrong.

Which TRAI rules apply to AI calls in India?

This is general information, not legal advice. The rules below cover commercial calls you place. Read the primary text and check with your telecom provider before a voice agent dials anyone.

• Registered senders and designated series only. TRAI's 2025 amendment says commercial communication must use registered headers or number resources from the special series for commercial communication, and an unregistered sender's telecom resources may be suspended or disconnected⁵.
• Tell your provider before you automate. Every sender must notify its originating access provider in advance, in writing, about using auto dialers or robo-calls and the intended objective⁵.
• AI voice is covered. TRAI's September 2026 amendment defines application-to-person calls as calls made by software without direct human dialing, including artificial voice technology, requires the entity to pre-declare them to its telecom provider with the numbers it will call from, and treats undeclared calls as unsolicited commercial communication⁶.
• 140 and 1600 series. TRAI requires the 140xx series for promotional calls from any sector, and customers can block those by sector on the Do Not Disturb registry; the 1600xx series is mandated for service and transactional calls from RBI, SEBI, IRDAI and PFRDA regulated entities and government¹². The 2025 memorandum says promotional robo calls should go through 140 numbers only, and service or transactional robo calls through 1600 or another series allotted for the purpose⁵.
• Enquiries expire. Under the 2026 amendment, a business may send commercial communication to a customer based on that customer's enquiry for seven days from the enquiry, and the enquiry must be in writing or digital and kept in verifiable form⁶.
• The law above TRAI. Section 28 of the Telecommunications Act, 2023 lets the Central Government make rules on prior consent for promotional messages and on Do Not Disturb registers¹³.

Should I build a voice agent or use a platform?

Use an all-in platform when you want one rupee rate, Indian languages tuned for you, and a phone number in one place. Ringg, for example, bundles speech, model, voice and telephony¹. Use a developer platform such as Vapi or Retell when you want to choose each part and have someone who can build on it⁹³. Get it built when the agent must follow your own rules and write to your own systems. SOT Labs lists an AI voice or tele-caller agent build from Rs 1.5 lakh plus per-minute usage¹¹.

Whichever you choose, the numbers and the telecom registration should be in your company's name, because TRAI's rules hold the sender responsible⁵.