OTP Flow

Cheap OTP SMS API for India

OTP traffic is high-volume and price-sensitive, so every paisa per message adds up. OTP Flow keeps it simple: a prepaid wallet, one transparent price per SMS, and no setup fee, subscription or minimum commitment.

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From ₹0.40 per OTP · No DLT registration · No KYC

Quick math

₹0.40 / SMS

₹400
1,000 OTPs
₹4,000
10,000 OTPs
₹40,000
1,00,000 OTPs

At the lowest tier. No setup fee, no monthly plan, failed SMS refunded.

OTP SMS from just

₹0.40/ SMS

When your largest single deposit is ₹5,000+. The more you deposit at once, the less each OTP costs.

  • No setup fee
  • No monthly plan
  • No hidden charges
  • Failed SMS auto-refunded
  • Rate is kept even if later deposits are smaller
Your largest single depositPrice per SMS

Estimate your cost

Drag to see the rate for a single deposit.

₹1,000
single deposit
₹100₹10,000
₹0.60
per SMS
1,666
OTPs
14%
cheaper
Start with ₹1,000

Payment gateway fees, if any, are shown before you pay.

What your OTPs actually cost

Total SMS cost at each price tier, before any payment gateway fee.

Single depositPer SMS1,000 OTPs10,000 OTPs1,00,000 OTPs
₹100 – ₹999₹0.70₹700₹7,000₹70,000
₹1,000 – ₹4,999₹0.60₹600₹6,000₹60,000
₹5,000+₹0.40₹400₹4,000₹40,000

Why OTP Flow is cheap

We only do one thing, transactional OTPs, so there are no bundles, seats or feature tiers to pay for.

  • Pay per OTP, not per month
  • Volume pricing from your largest single deposit
  • No setup, onboarding or API fees
  • Failed SMS are refunded automatically
  • No DLT registration or KYC costs
  • Wallet balance never expires

How your rate is decided

Your price per SMS depends on your largest single deposit. Deposits are never added together: two ₹1,000 deposits still count as ₹1,000. Once you make a bigger deposit, that better rate is yours to keep, even if your later top-ups are smaller. Pick the tier you need, top up once, and send.

No hidden costs

The price on this page is the price you pay per delivered OTP. There is no setup fee, no monthly plan and no charge for messages that fail. A few payment gateways add a small processing fee, and it is always shown before you pay.

Pay the way you prefer

Top up your wallet with UPI, cards and netbanking via Razorpay, with Binance Pay (USDT), or with crypto through OxaPay. Funds are credited to your wallet as soon as the payment is confirmed.

Need an even lower rate?

High-volume senders can get a custom per-OTP rate. Create an account, send your first OTPs and contact us with your expected monthly volume.

Good to know

OTP Flow is built for transactional one-time passwords (login, signup, payments, delivery and similar verification). Promotional or bulk marketing messages are not supported.

Frequently asked questions

What is the lowest price per OTP?+

The lowest published tier is ₹0.40 per OTP, available when your largest single deposit reaches the top tier. See the tiers above for current rates.

Do small deposits lower my rate?+

No. Your rate follows your largest single deposit, so smaller later deposits never reduce it. Several small deposits are not added together either.

Is there a monthly fee or minimum commitment?+

No. OTP Flow is prepaid pay-as-you-go. You only spend what you send, and your wallet balance does not expire.

Do I pay for OTPs that fail to send?+

No. If the SMS cannot be handed to the carrier, the charge is refunded to your wallet instantly.

Are there extra charges for DLT or KYC?+

There is nothing to register. You use our pre-approved template and sender ID, and you can start without business documents.

Can I get a custom rate for high volume?+

Yes. Custom per-user rates are available for high-volume senders. Contact us with your expected volume.

Which payment methods can I use?+

UPI, cards and netbanking via Razorpay, Binance Pay (USDT) and crypto via OxaPay.

Send your first OTP today

Create an account in under a minute. No DLT registration, no KYC, no subscription.

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