WhatsApp OTP & Login Verification

How WhatsApp OTP works with InfiQ

The flow is fully automated and event-driven. When a user hits your login, signup, password-reset or transaction-confirmation step, your app calls InfiQ, we generate and dispatch an approved authentication template to the user's WhatsApp number, and the code lands in seconds. WhatsApp's authentication templates come with a built-in copy-code button (and autofill on supported apps), so the user taps once and returns to your screen. Delivery and read status flow back to your backend via webhooks, so you can retry, escalate to a fallback, or unlock the session the moment the code is entered. Because it runs off your existing verification logic, you keep full control of code generation, expiry and validation on your side.

• Trigger: login, signup, password reset, payment or step-up auth
• Dispatch: approved WhatsApp authentication template sent instantly
• Entry: one-tap copy button or autofill fills the code
• Confirmation: delivery/read webhooks let you unlock or retry

Authentication templates, the right way

Meta treats verification as its own message class. Authentication templates have a fixed, tamper-resistant structure — a short body carrying the code, an optional security disclaimer, an expiry line, and the copy-code or one-tap button — and they're approved and priced separately from marketing and utility messages. That structure is deliberate: it keeps OTPs clean, unspoofable and instantly recognisable, and it means your verification traffic is never mixed in with promotional content. InfiQ pre-builds and submits these templates for you, handles the review cycle, and keeps a tested set live so you're never blocked waiting on approval when you launch a new flow.

• Fixed authentication layout — code, expiry, security note, copy button
• Approved and billed under the authentication category, separate from marketing/utility
• One-tap copy and autofill supported out of the box
• InfiQ manages template submission and re-approval so you stay unblocked

Plug it into the stack you already run

OTP on WhatsApp only pays off if it fires automatically from your real systems. InfiQ exposes a straightforward send API plus ready connectors, so your web app, mobile backend, e-commerce store or CRM can request a code with a single call. Trigger verification from a Shopify checkout, gate a Zoho CRM portal login, confirm a Razorpay payment with a step-up code, or wire it into your own auth service. Delivery webhooks feed status back so your session logic stays authoritative. Most teams are sending live codes within a day of onboarding, because the heavy lifting — number setup, template approval, and rate handling — is already done.

• Simple send API for any backend or auth service
• Connectors for Shopify, Zoho CRM, Razorpay and more
• Webhooks return delivery and read status for retry logic
• Fallback-friendly design so you can chain a second channel if needed

Honest pricing on Meta's authentication rate card

Since 1 July 2025, Meta bills WhatsApp per delivered message by category, and authentication messages have their own rate — you're charged for each verification code that actually gets delivered, not per conversation and not per attempt that fails to land. InfiQ applies its own transparent platform pricing on Meta's live authentication rate card (ex-GST), so you see exactly what a delivered OTP costs before you scale. The 24-hour customer service window is free messaging, not a billing unit, and it never applies to how OTPs are counted. You own your WhatsApp Business account and your BSUID outright — there's no lock-in on the asset that carries your verified identity.

• Per-delivered-message billing under the authentication category
• Transparent ₹ pricing, ex-GST
• No charge for codes that fail to deliver
• Full ownership of your WhatsApp Business account and BSUID

Industries running OTP on WhatsApp

Any business that gates access with a code benefits, but the fit is sharpest wherever a failed OTP directly loses money or locks a user out. Fintech and lending apps use it for login and transaction step-up. E-commerce and D2C brands use it for guest-checkout verification and account creation. Healthcare and diagnostics platforms confirm appointment and report-access logins. SaaS and portal products use it for passwordless sign-in and password resets. Logistics and delivery apps verify rider and customer handoffs. In every case the pattern is the same: move the code onto the channel with the highest open rate and the clearest sender trust, and watch verification completion climb.