OTP API for
Dating and Social Apps
Phone-verify Vietnamese users on your dating app without the per-SMS cost killing your unit economics. $0.022 per delivered OTP, voice fallback when carriers throttle SMS.
Pain points dating teams hit
Dating apps need verification AND low CAC
You verify every signup to fight fake profiles, but $0.07-$0.16/SMS via Twilio swallows CAC. Cutting OTP cost 3-5x is the easiest unit-economics win.
Adult-adjacent features get aggressive provider review
Even mainstream dating apps with photo sharing or chat get scoped as "adult content" by Twilio compliance. Our terms do not gate dating verticals.
High SMS volume bursts on app marketing pushes
Influencer or TikTok marketing push → 20k signups in 24h. CPaaS providers throttle without warning. Wallet-funded model scales linearly until your balance runs out.
Why NEXO ROUTE fits
- Cheapest per-OTP rate published for Vietnamese carriers
- Voice fallback ensures verification even when SMS is silenced
- Per-carrier routing — Viettel/Vinaphone users get voice, Mobifone gets SMS
- No content review — we do not see your app, only the OTP code
- Webhook delivery confirms in real-time, drives onboarding UI state
Integration approach
Trigger OTP at signup and on every login from a new device. Optionally re-verify monthly for accounts with high-trust actions (in-app purchases, gift sending).
Sample · TypeScript
// Dating app signup flow
import { customAlphabet } from 'nanoid';
const otp = customAlphabet('0123456789', 6);
export async function sendSignupOtp(phone: string) {
const code = otp();
await db.signupChallenge.upsert({
where: { phone },
update: { code, attempts: 0, expiresAt: in5min() },
create: { phone, code, expiresAt: in5min() }
});
return fetch('https://nexoroute.dev/api/v1/send-otp', {
method: 'POST',
headers: { 'Authorization': `Bearer ${KEY}`, 'Content-Type': 'application/json' },
body: JSON.stringify({ phone, code })
}).then(r => r.json());
}FAQ
How does the cost compare for 50k OTPs / month?
NEXO ROUTE: 50k × $0.022 = $1100. Twilio (VN): 50k × $0.10 avg = $5000. Vonage: 50k × $0.08 = $4000. ~$4000/month savings for the same delivery volume.
Can I verify the same phone twice?
Yes — no de-dup on our side. Upstream TKC enforces 30-second cooldown between calls to the same phone, so back-to-back resends throttle.
Do you offer phone reputation / fraud scoring?
Not directly. But OTP delivery success is a strong signal — failed delivery on a fresh phone is 60-80% bot-likely in our data.
Can I use this alongside Twilio for non-VN users?
Yes — many apps do. Route +84 phones to us, everything else to your existing provider. Detect prefix in your backend and dispatch accordingly.
Built for dating and social apps
5 free test OTPs on signup. No card, no KYC, no vertical review.