OTP88 — one API for login codes over WhatsApp, Telegram, SMS and voice
A verification platform that sends one-time codes through the cheapest channel that works, and falls back automatically when one fails.
What it is
OTP88 is a platform for one-time passwords — the six-digit codes an app sends when you sign up or log in. A business connects once and can deliver codes by WhatsApp, Telegram, direct SMS or a voice call.
The problem
SMS alone is expensive and does not always arrive, especially across borders. And bots can flood a sign-up form with fake requests that the business ends up paying for.
How it works
A waterfall: WhatsApp first; if the code is not delivered within 8 seconds, it moves to Telegram, then SMS, then a voice call. Every send is screened for fraud signals such as traffic pumping and burner numbers, and prices are published per channel — no hidden fees.
What I like about it
Clear pricing, a plan B for every failure, and protection from paying for fake traffic. Unexciting on the surface — and exactly what a login screen needs.
Scope
- WhatsApp OTP
- Telegram gateway
- SMS & voice fallback
- Fraud screening
