Nomorobo Spam Score

Finally! No more robocalls!

Over 800,000 real people trust Nomorobo to protect their home and mobile phones from robocalls and telemarketers. The same robocall blocking technology that powers the top VoIP providers is now available as a simple and inexpensive Twilio add-on.

Every day, we automatically analyze millions of real calls to detect robocalling patterns and to catch voice spammers spoofing their Caller ID. With an accuracy rate of over 98% and a false positive rate that's less than 0.25%, you can be sure that bad calls are blocked and good calls get through.

Nomorobo makes it easy and affordable to protect your business and your customers from robocalls and voice spam.

Currently, Nomorobo only works with North American (+1) incoming numbers.

  • Trusted By 800,000+ Users Every Day

    Every day, over 800,000 people trust Nomorobo to protect their landline and mobile phones from robocalls. To date, over 150 million robocalls have been stopped from reaching consumers.

  • FTC Robocall Challenge Winner

    The Federal Trade Commission, the very people that created the Do Not Call list, chose Nomorobo as the winner of the FTC Robocall Challenge.

  • Accurate

    Nomorobo is over 98% accurate and has a false positive rate that's less than 0.25%.

  • Simple and Straightforward

    A simple true/false value lets you know if a call is valid. No guessing or threshold setting. We do the hard work for you.

Sample annotation responses

The Nomorobo Spam Score

Nomorobo returns a binary value (0/1) to let you know whether an incoming phone number is showing high frequency call patterns. Armed with this information, you can simply <Reject> the call or route it through an alternative call flow.

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The Twilio advantage
  • Communicate reliably

    Experience a 99.95% uptime SLA made possible with automated failover and zero-maintenance windows.

  • Operate at scale

    Extend the same app you write once to new markets with configurable features for localization and compliance.

  • Many channels

    Use the same platform you know for voice, SMS, video, chat, two-factor authentication, and more.

  • No shenanigans

    Get to market faster with pay-as-you-go pricing, free support, and the freedom to scale up or down without contracts.