FORTUNE - Founded in 2014, Blind is a forum and professional network where employees can freely discuss the dark side and stigmatized parts of being in the workforce. "We're almost like the foil for LinkedIn. Blind is a bit rawer because it is anonymous. You can be a little bit more emotional, almost edgy," says Rick Chen, director of public relations at Blind. Blind grew its user base by ~75% to 100% in the past year and a half. He connects the usage of Blind to eras of uncertainty for workers. It attracted employees during the start of COVID. Those who left their companies during the Great Resignation, and now people who are returning to the office.