Silicon Valley venture capitalist Peter Thiel's attack on Gawker shows "the power of the billionaire class," the online media company's founder and CEO Nick Denton told CNBC on Friday.

Denton also said Gawker has evolved over the years, becoming more responsible. "I'm different than I used to be. And I think our writers and editors have also grown up," he said in the "Squawk Box" interview.