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RingCaptcha

Phone verification service that uses SMS and voice codes to weed out fake sign-ups, leads and comments

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  • Founded 2012
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About RingCaptcha

RingCaptcha checks that the people signing up, submitting leads or posting comments are real, using one-time codes sent by SMS or voice call. The company is listed in Japan and serves businesses with customers worldwide.

What RingCaptcha does

  • Two-factor verification: SMS and voice codes that confirm a phone number at sign-up or login.
  • Lead validation: screening so sales teams can tell genuine enquiries from fake ones.
  • Blocklisting: back-end checks that flag suspicious requests and block them in future.
  • Comment screening: verification before reviews or posts are published, to stop bot and fraudulent content.
  • Single API: one interface for sending codes through Twilio, MessageBird, Nexmo, Infobip and other providers.

Who it works with

The service is aimed at online businesses troubled by bots, repeat trial accounts, hacked logins or spam leads. A trial with fifty messages is available without a card.

Key facts

  • Based in: Japan
  • Channels: SMS and voice
  • Provider support: Twilio, MessageBird, Nexmo and Infobip

Profile written by TrustList from the business's own published information, Sep 2026.

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