FlashCall authorization

Send passwords to your clients via incoming calls.

Sigma messaging offers FlashCall — a service for delivery one-time passwords in a phone number. It is an affordable alternative to SMS messaging. FlashCall
is 5 times more profitable than SMS.

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A modern and profitable two-factor authorization method with a number of significant advantages. It allows sending a confirmation code to the subscriber via incoming call.

Benefits of FlashCall

  • Instant authorization
  • A subscriber easily gets the code
  • One price for all operators
  • Delivery guarantee
  • Simple API integration
Activate FlashCall in 5 minutes
SIGMA messaging manager will contact you to get the details and create an account in the platform.
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    High cost efficiency and safety in one service

    Flashcall — one-time password given in the last four digits of an incoming call number. It may be applied for user authentication.
    Sending a password via incoming call is much more profitable than using messengers. A large amount of calls guarantees
    reliable protection of subscribers' personal data.

    Unique advantages

    • Real cost optimization

      FlashCall integration reduces the cost of password sending by 5 times as compared to SMS. The price does not depend on a subscriber's operator.

    • Fast implementation

      If you use SMS, we will provide an instant migration to FlashCall.

    • Reliability

      We provide a large number of calls and guarantee the service protection from code selection.

    • Minimum requirements

      For successful call authorization you need nothing but a subscriber's mobile phone operating on the GSM.

    • Simple API

      We keep popular Protocols and provide detailed documentation. Service implementation and testing do not require time.

    Cascade messaging

    Set up messaging cascading via all provided channels, such as FlashCall, WhatsApp, Viber, SMS.

    Benefits of Cascade messaging:

    • Cost optimization — save up to 70%
    • Use of all multimedia possibilities in one bulking session

    The system analyzes the contact base and send messages via the most profitable channel. Single API to reach your goals.

    Communication channels

    SIGMA messaging offers a messaging platform via various communication channels. Interact with your customers in a convenient format.
    Reliability, flexibility and benefits are our top priorities.
    Get a quote
    Please leave your contact details. Our manager will contact you and provide with a detailed description of the features and prices at our platform.