Two founders of Web content recommendation service StumbleUpon said Monday they bought the company back from online auction house eBay Inc., just two years after eBay purchased the startup for $75 million.

The founders, Garrett Camp and Geoff Smith, bought the company back with the help of investors including Ram Shriram of Sherpalo Ventures, Accel Partners, and August Capital, they said. Financial terms were not disclosed.

Camp will be chief executive of the company.