YouMail's May index: 4.1 billion robocalls, and the framing that travels with it

Americans got just over 4.1 billion robocalls in May, per the YouMail Robocall Index — about 132.8 million a day, 1,537 a second, roughly 12.5 per person. The figure is down about 2.1% from April and 14.9% from May 2025, with scam and telemarketing calls making up around 47% of the total and insurance pitches leading the worst campaigns.

The number is worth taking seriously; the headline it arrived under — “here’s why you still need protection” — is worth reading for what it is. YouMail sells call protection, and its index is both a genuine measurement vantage point and a standing argument for its own product. That doesn’t make the data wrong, but it’s the reason to log the series rather than the month: a vendor’s incentive is to keep the threat salient, so the useful signal is the trend line you can set against measurements taken from other vantage points.

That’s where this becomes a building block. YouMail counts volume from the consumer-app side; TransNexus reads robocall share from the carrier-tools side. When a roughly 15% year-over-year decline shows up in one, the question for the synthesis is whether the other vantage points agree — or whether each is just describing the slice of the network it can see.