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Get verified in a flash

Meet Flash Call Verification: the faster, more cost efficient alternative to traditional SMS verification. Multi-factor authentication has never been so smooth!

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The power of Flash Call Verification

The best option for you and your customers

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    Reduced friction

    With Sinch Flash Call, numbers can be verified using Android flash call verification, without any user interaction at all or a web application verification with minimal user interaction.
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    Speed

    Speed is of the essence! If you’re looking to verify customers quickly, our Flash Call Verification is ready for the job. Flash Call is by far the fastest verification method.
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    Lower costs

    Yes, you can get premium service while saving money. With Flash Call Verification (using SMS as a fallback), you can save up to 70% on OTP costs compared to traditional SMS.
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Competitive and transparent pricing

With our direct local operator connections and intelligent routing we ensure your Flash calls always get through.

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Get started

Get started in no time with our easy integration

Integrate using our REST API or SDK for iOS, Android and JavaScript through this two easy steps:

  1. Request verification Flash-call, see sample curl command on the right
  2. Report verification Flash-call
GO TO REST API DOCUMENTATION
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curl -X POST \

     --user "APPLICATION_KEY:APPLICATION_SECRET" \

     -H "Content-Type: application/json"  --data " \

        { \

                "identity": { \

                       "type":"number", \

                       "endpoint":"+1555123123" \

               }, \

               "method":"flashcall" \

        }" \

  "https://verificationapi-v1.sinch.com/verification/v1/verifications"

    Go to documentation

    Use cases

    Verify users. Fight fraud. Build trust.

    truecaller

    Ensure the highest level of security

    Truecaller, the mobile app that's transforming the phonebook, has over 100 million customers around the world. With 2-Factor Authentication (2FA)key to the business, they turned to Sinch for Flash Call technology to verify user numbers.

    badoo logo

    Global reach

    Popular app Badoo makes it fun to connect with new people locally to chat, date, meet up, or make new friends. Operating in 180 countries, Badoo needed a global verification solution - which they found in Sinch.

    Glide Logo

    A superior customer experience

    Glide is the all-in-one app for live streaming video, text, and chat. Glide wanted to offer friction-free number verification to its growing global user base - and Sinch Flash Call verification proved a perfect match. "Ever since we integrated Sinch's Flash Call verification, we've seen a record increase in successful verifications across the globe," says Ari Roisman, Co-Founder and CEO at Glide.

    Sinch has created a service that has been very helpful to our company. It's easy to integrate, easy for our users, and provides great results.

    Alan Mamedi

    CEO & Founder, Truecaller
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    Need assistance? Speak with an expert.

    Features

    One solution - all your verification needs

    Easy integration

    Using the lightweight Sinch Flash Call Verification SDK or our REST API, you can integrate Flash Call Verification into Android and web apps with just a few lines of code, & get verified in double quick time.

    Route optimization

    We continously optimize for the best routes, using the real time feedback from our Reporting API, leading to the highest possible conversion rates.

    Top-notch security

    Thanks to our pool of 100,000 numbers, which we draw on to make authentication calls, this is equivalent to a 5 digit SMS OTP code. Plus if needed, we can add higher security!

    Seamless user experience

    Our Android SDK will manage the complete call verification action on the device, guaranteeing a great use experience.

    Automatic OTP interception

    With Flash Call verification, the one-time password (OTP) is intercepted automatically - making the customer experience seamless from the first touchpoint!

    Committed to data protection

    Strong privacy, data protection and security are at the heart of our mission - so of course we do our best to make sure we're compliant with GDPR and other privacy policies.

    Our transparent and competitive pricing to meet your business needs

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      Quick & easy sign-up
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      Free test credit
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      Easy to implement APIs & SDKs
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    Other questions about pricing? Talk to a pricing expert.

    FAQ

    Frequently asked questions

    Need more help?

    Check out our extended FAQ here.

    Enhance your business and customers’ account security with Sinch Flash Call Verification

    Start validating users phone numbers quickly and efficiently with easy and reliable integration through Sinch SDK or REST API. We are also available to discuss your business needs and find the right solution for you.

    Start verifying with us