Roughly half of all Web traffic comes from bots and crawlers, and that’s costing companies a boatload of money.

That’s one finding from a report released Thursday by DeviceAtlas, which makes software to help companies detect the devices being used by visitors to their websites.

Non-human sources accounted for 48 percent of traffic to the sites analyzed for DeviceAtlas’s Q1 Mobile Web Intelligence Report, including legitimate search-engine crawlers as well as automated scrapers and bots generated by hackers, click fraudsters and spammers, the company said.

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