Voice OTP & Notifications Built for Business
Deliver one-time passwords, critical notifications, and authentication calls via automated voice — powered by text-to-speech and a carrier-grade global network. When SMS isn't enough, voice gets through.
Core Capabilities
Text-to-Speech OTP Delivery
Convert your OTP codes into natural-sounding voice calls using text-to-speech — ideal as a fallback when SMS cannot be delivered. Our engine is optimized for speed and clarity, ensuring codes are heard and acted on instantly.
Automated Voice Notifications
Trigger outbound voice calls for urgent alerts, payment reminders, and critical system events. Reach customers who are unreachable via SMS or app push — with a message they cannot miss.
Voice Authentication
Add a secure, carrier-independent authentication layer with voice-delivered OTPs and confirmation calls. Reduce fraud risk and meet compliance requirements on flows where silent channels fall short.
Global Carrier-Grade Reach
Leverage our 800+ carrier network to deliver voice calls globally. Intelligent routing ensures the fastest, most reliable path to every destination — every time.
Use Cases
TTS OTP Delivery
Read one-time passwords aloud via text-to-speech call — the essential fallback when SMS delivery fails.
Voice Notifications
Trigger automated calls for urgent alerts, payment reminders, and critical system notifications.
Voice Authentication
Deliver secure authentication codes via voice call for users who cannot receive SMS-based OTPs.
Why TeleSystems for Voice?
TeleSystems powers enterprise-grade messaging services across 800+ global carriers, ensuring reach, reliability, and regulatory compliance with every message.
Accelerated OTP Delivery, Higher Conversions
Our intelligent routing prioritizes speed for authentication flows — OTPs arrive in milliseconds, reducing drop-off at critical conversion points.
Reliable SMS Fallback via Voice
When SMS delivery fails, voice TTS picks up seamlessly — ensuring no verification code or notification is ever lost.
Global Voice Coverage, Carrier-Grade
Leverage our 800+ carrier network to access deep voice coverage worldwide through a single integration.
Compliance-Ready Authentication
Voice authentication meets the security and regulatory requirements of markets where silent-channel OTP alone is insufficient.
Deliver OTPs and Alerts That Get Through
When SMS falls short, voice picks up — our experts will configure the right TTS and notification flows for your use case.