Your users confirm their number with one WhatsApp tap — no SMS gateway, no per-message OTP fees, no codes to type. A hosted verification screen you drop into any signup, with signed results sent straight to your backend.
You pay per message for every code you send, including the bots and typos that never convert. At scale, phone verification quietly becomes a real line item.
Every SMS OTP you send is billed — and you pay it on failed attempts and fraudulent signups too, not just successful ones.
The user taps a WhatsApp link and messages you — that inbound message carries no per-SMS gateway fee. You pay only when a verification actually succeeds.
The user proves they hold the number by tapping a WhatsApp link and sending a prepared message. We match it and send a signed result to your backend.
Your backend calls our API with the user's phone number. You get back a hosted verify link, branded as you.
On the hosted screen they tap “Continue with WhatsApp” and send the prepared message from their number — no code to type.
We match the sender to the session and send a signed confirmation to your backend. Trust it server-side and let them through.
No per-message gateway bill, and you’re only charged for verifications that succeed.
Start a verification, point the user at the hosted screen, confirm the result on your server.
One POST with the phone number returns a hosted, branded verify link.
Open it as a popup with our SDK, or redirect. The user taps WhatsApp and confirms.
Confirm server-side (or verify our signed callback) and trust the result. The browser alone is never proof.
No per-message gateway bill. You’re charged only for verifications that succeed.
What companies say after switching phone verification to WhatsApp.
"We moved signup verification to WhatsApp and our phone-OTP bill basically disappeared. The drop-in screen took an afternoon to integrate."
"Fraudulent signups were burning our SMS budget. With LineVerify we only pay when a number actually verifies — costs dropped sharply."
"Users love that there's no code to type — they just tap WhatsApp. Completion rates went up and support tickets went down."
Create an account, verify your own number over WhatsApp, and start verifying users in minutes.