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Verify users identities using two-factor SMS messaging from RingCaptcha.
Jackie CohenFebruary 1, 2017February 4, 2017

Your Users’ SMS Phones Are Dumber Than Donald Trump’s

Were you shocked to read that the President of the United States was Tweeting with an unsecured Samsung Android phone? Well, here’s a reality check for you: At least half… [Continue Reading]


Phone numbers are the new user ID according to SMS provider RingCaptcha
Martin CocaroMarch 16, 2016October 12, 2017

Phone Numbers Are the New User ID

Phone numbers are the fastest, personal and most intuitive identity to use in the mobile era. While you might still think of your driver’s license as your ID, it doesn’t… [Continue Reading]


Martin CocaroJuly 23, 2015December 12, 2017

How the Generic SMS APIs Compare to Each Other (and RingCaptcha)

Generic SMS solutions simply don’t perform well in certain markets, including India, China, many European nations and in the Middle East, often resulting in a disproportionately large percentage of blocked transmissions.




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Open source the Javascript widget RingCaptcha SMS.
Martin CocaroJuly 14, 2015May 5, 2017

Open Sourcing the JavaScript Widget

At RingCaptcha, we believe in a few things very strongly:  1. Phone numbers are the strongest identity signal. 2.Chuck Norris jokes still make us laugh. 3. Open source is the only way… [Continue Reading]



SMS user authentication with layer via RingCaptcha
Martin CocaroJune 30, 2015March 28, 2017

Leveraging RingCaptcha for SMS User Authentication with Layer

The phone number is shared across an intimate spectrum of friends, colleagues and family — the uniqueness and longevity of the phone number, plus the intimate social graph make the… [Continue Reading]



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RingCaptcha literally helps you make every user count -- weed out the fakes, flakes, and fraudsters that would otherwise interfere with your community building.

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Popular Articles

  • Phone numbers are the new user ID according to SMS provider RingCaptcha

    Phone Numbers Are the New User ID

  • How the Generic SMS APIs Compare to Each Other (and RingCaptcha)

  • SMS verification is really difficult to implement in-house -- don't do it yourself when you can use RingCaptcha!

    The Most Common Issues You’ll Encounter When Trying to Implement SMS Verification In-House

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