Evan Clark "Ev" Williams (born March 31, 1972) is an American billionaire technology entrepreneur.

He attended the University of Nebraska–Lincoln for a year and a half, where he joined FarmHouse fraternity, then left the school to pursue his career.

[4][5][6] After departing from college, Williams took on various technology jobs and start-up firms in Key West, Florida, and in Dallas and Austin, Texas, before returning to his family farm in Nebraska.

In 1996 Williams moved to Sebastopol, California in Sonoma County to work for the technology publishing company O'Reilly Media.

He started at O'Reilly in a marketing position, later becoming an independent contractor writing computer code, which led to freelance opportunities with companies including Intel and Hewlett-Packard.

In October 2010, Williams stepped down from the CEO position, explaining that he would be "completely focused on product strategy," and appointed Dick Costolo as his replacement.

[22] On April 6, 2017, an article announced Williams would sell 30 percent of his stock in Twitter, for "personal reasons.

[32] In 2024, Williams announced his new company, Mozi, which is a private social network he co-founded with entrepreneur Molly DeWolf Swenson.

[38] After President Donald Trump credited his election win to the use of Twitter, Evan Williams stated that if true, he was sorry.

[39] Williams told the Associated Press that he was wrong to think that an open platform where people could speak freely would make the world a better place.