This company’s software powers the auctioning of advertisements. As consumers navigate between web pages, Switch’s customers – such as the AA and the Racing Post – get the best price for the number of consumers their advertising reaches. Switch places more than 1bn ads every day, and its technology interprets browsing behaviour to select the right ad. The Southampton firm, led by founders Julian Spector, 59, and Tom Barnett, 34, saw sales hit £14.5m this year, as more media buyers adopted real-time advertising.
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