Sonex Labs

Cost tool · Updated 24 October 2026

AI calling agent cost calculator for India

With the default assumptions, an AI calling agent on Sonex Labs costs about ₹4.21 a minute, including speech to text, text to speech, language-model tokens and telephony. Enter your monthly minutes and call length to see each cost line, and the same calls priced at telecaller salaries.

Change the assumptions

All in, per minute

₹4.22

$0.0444 · ₹12.65 ($0.133) per 3-minute call

All in, per month

₹84,316

$887.20 · about 6,667 calls

Sonex Labs, line by line, before taxes
LinePer minutePer month
Speech to text₹0.50 a minute of call time, the same in Hindi as in every other language₹0.50$0.0053₹10,000$105.22
Text to speech₹2.97 a minute of call time, the same in every language₹2.97$0.0313₹59,400$625.02
Telephony: Plivo₹0.38 a minute, 30-second pulse, 1 number at ₹200 a month. List price₹0.39$0.0041₹7,800$82.07
Language model (LLM)Billed per token: 12,000 input and 240 output tokens a minute at $0.30 and $0.60 per million₹0.36$0.0037₹7,116$74.88
All in₹4.22$0.0444₹84,316$887.20

The same calls made by telecallers

₹45,000 to ₹1,00,000 a month

6,667 calls a month needs 3 to 4 telecallers at 80 to 100 calls a day over 26 working days, paid ₹15,000 to ₹25,000 a month each. That is ₹6 to ₹12 a call in salary alone, against ₹12.65 a call above. Seats, phones, calling minutes, supervision and attrition are extra and not counted.

Sources

Sources for the defaults

Sonex prices
The pricing page: for voice agents, speech to text ₹0.50 and text to speech ₹2.97 a minute of call time; the language model $0.30 and $0.60 per million input and output tokens. Telephony is billed by your carrier, not by Sonex. The telephony rates come from each provider's own pricing page, linked under the provider picker, checked on 24 October 2026.
Exchange rate
₹95.0365 per US dollar from open.er-api.com on 24 October 2026. Invoices are raised in your contracted currency.
Language-model tokens per minute
An assumption, not a measurement: Four turns a minute, each resending about 3,000 tokens of system prompt and conversation history, with about 60 tokens of reply per turn. Vapi support: the full prompt and history are sent on every turn.
Telecaller salary and calls a day
These are self-reported and secondary figures, so the range is wide on purpose.

Before a calling campaign in India, check which number series your calls must use. There is also a free call script in Hindi to start from, and a page on voice agents for enterprises.

FAQ

Questions about the cost

On Sonex Labs, about ₹4.21 ($0.0443) a minute with our default assumptions, at ₹95.0365 per dollar (open.er-api.com, 24 October 2026). That is speech to text at ₹0.50 a minute, text to speech at ₹2.97 a minute, language-model tokens at about ₹0.36 a minute ($0.30 and $0.60 per million input and output tokens), plus telephony at about ₹0.38 a minute through Plivo, the cheapest published rate we found. Before taxes.

No. Hindi, Tamil, Bhojpuri, Arabic and every other language cost the same: ₹0.50 a minute for speech to text and ₹2.97 a minute for text to speech.

No. You connect your own carrier or a telephony provider, and that provider bills the call minutes directly; Sonex adds no telephony charge. Published rates on 24 October 2026: Plivo ₹0.38 a minute (30-second pulse), Twilio US$0.0496 a minute (no Indian caller ID), and Vobiz about ₹0.40 a minute at Sarvam's resale price. Knowlarity works out to about ₹0.50 a minute on its Premium Plus plan. Exotel, Ozonetel, Tata Smartflo and MyOperator do not publish a per-minute rate; if you use one of them, choose "My own carrier" and enter your rate.

Taxes, and your own carrier's bill if you bring your own telephony. On the human side, only salary is counted: seats, phones, calling minutes, supervision, training and attrition are not.

An Indian calling-business operator wrote in April 2026 that a telecaller costs about ₹20,000 a month and makes about 80 calls a day, with 80 to 100 a day the practical ceiling. Older Quora answers put entry-level metro support pay at ₹10,000 to ₹13,000. We use ₹15,000 to ₹25,000 a month and 80 to 100 calls a day over 26 working days, which is ₹5.77 to ₹12.02 a call in salary.

Because it depends on your prompt. Most voice agents resend the whole system prompt and conversation history on every turn, so a long prompt costs more each minute. Our default is 12,000 input and 240 output tokens a minute; change it under "Change the assumptions", or read real token counts from your call logs.

Build and test an agent

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