Specification sheet · Messaging & A2P SMS
OTP & Verification Messaging
One-time passcodes on dedicated high-priority routes - sub-3-second median delivery, automatic failover to voice OTP and flash call, AIT and fraud protection, and conversion tracking from send to successful verification.
High-priority OTP and verification messaging with sub-3-second delivery, failover to voice OTP and flash call, AIT/fraud protection and end-to-end conversion tracking.
- Median OTP delivery
- < 3 s
- Channels: SMS, voice, flash call
- 3
- Delivery on direct routes
- 98%+
At a glance
- Dedicated high-priority OTP routes with reserved capacity
- Sub-3-second median delivery on direct operator binds
- Automatic failover to voice OTP and flash call
- Real-time AIT and bot detection with spend caps
- Conversion tracking per country, operator and channel
- Pre-registered OTP templates for DLT and other regimes
- Verify API with code generation, expiry and retry logic
- Sender ID and content protection against phishing
Typical use cases
- 01Banks and payment providers
- 02Marketplaces and e-commerce
- 03Ride-hailing and delivery apps
- 04Social, dating and gaming
- 05SaaS and enterprise login
Technical & commercial specifications
| Channels | SMS OTP, voice OTP (TTS in 30+ languages), flash call |
|---|---|
| Latency | Median < 3 s SMS delivery on direct routes; latency SLA available |
| Coverage | 220+ countries SMS; voice OTP with local CLIs in 100+ countries |
| Integration | Verify API (REST), SMPP, voice API, web/iOS/Android SDKs, webhooks |
| Fraud controls | AIT detection, velocity limits, geo-fencing, spend caps, block lists |
| Code handling | Hosted generation, 4–10 digits, configurable expiry and retries |
| Templates | DLT-registered and locale-specific; protected sender IDs |
| Analytics | Delivery, latency and conversion by country, operator, route, channel |
| Billing | Per attempt by channel and destination; prepaid or postpaid |
| Support | 24×7 NOC and SOC; P1 response ≤ 15 min; named account manager |
Talk to Dollu about OTP & Verification
Send us your destinations, volumes, sites or use case and we will return a proposal, pricing and a technical plan within one business day. Test credentials and the full service description and SLA document are available on request.
- Sales
- [email protected]
- Phone
- +91 777-500-2222
- Web
- dollu.com
- NOC
- [email protected] · 24×7
Dollu Ltd · 2403A, Iconic Corenthum, Sector 62, Noida 201301, India. This sheet summarises the standard service; specifications may vary by country and are confirmed in the service order.
Online version: https://dollu.com/services/messaging/otp-verification-messaging
Contact: https://dollu.com/contact?service=otp-verification-messaging