Voice - Overview

Use Telesign Voice to build application-to-person, person-to-application, and person-to-person voice calling into web and mobile applications.

This service uses advanced phone number cleansing, which improves deliverability by more than 10% in most markets.

Telesign also performs automated traffic monitoring to identify red flags and suspicious patterns, which helps protect businesses from International Revenue Share Fraud (IRSF) attacks.



If you are interested in trying Telesign Voice, sign up by contacting our experts.

Common use cases

  • Programmatic calling. - Make, receive, and control calls programmatically.
  • Verification - Deliver secure, voice-based, one-time passcodes (OTPs).
  • Connect two parties - Design person-to-person calling experiences, providing a two-way voice communications channel directly from your application.
  • Call with number masking - Use phone number masking to connect two parties without disclosing user identities, to maintain privacy and keep transactions β€œon-platform.”
  • Play audio - Play your own audio files during an active phone call for voice greetings, call scripts, notifications, branding messages, and more.
  • Collect digits - Collect user-entered DTMF digits during a phone call. Callers can use this to answer prompts and immediately request returns.
  • Send text-to-speech (TTS) messages - Convert text into a voice-message. Provide a localized customer experience with TTS available in 26 languages and dialects (more than any competitive offering).
  • Build interactive voice response (IVR) flows - Build easy-to-manage IVR flows with DTMF key prompts to send callers through pre-selected call flows. Reduce support costs, call transfers, and agent handling times by approximately 60-80%.
  • Survey callers - Automatically send surveys after calls to collect feedback from customers or clients.
  • Record calls - Create and retrieve recordings of your calls.
  • Transcribe call recordings - Create call recording transcriptions; these can then be used for sentiment analysis or other optimizations.



Use only codecs and standards for audio files supported by Telesign Voice. See Voice - Supported standards and codecs for more details.

Documentation by category


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