A new survey by Glassdoor suggests that tech leaders are some of the most popular CEOs in America. Google CEO Larry Page came in first in Glassdoor’s ranking, with a 97 percent approval rating from his employees. The next tech leader, Facebook CEO Mark Zuckerberg, came in fourth with a 95 percent approval rate. Tim Cook, CEO of Apple, came in tenth place with a 94 percent approval rate. LinkedIn CEO Jeff Weiner, T-Mobile CEO John Legere, Salesforce CEO Marc Benioff, and Yelp CEO Jeremy Stoppelman came in twelfth, fourteenth, twenty-first, and twenty-second, respectively. Much further down the list, Intel CEO Brian Krzanich came in thirty-ninth, and Adobe CEO Shantanu Narayen came in forty-seventh. What makes a good tech CEO? The ability to articulate a vision is a big plus, especially since many tech pros want a sense that their work contributes to a broader, possibly world-changing mission. Good CEOs also know that competitive salaries and perks are a must when trying to draw the best talent, especially in today’s economy. For every Larry Page or Mark Zuckerberg, however, there are tech CEOs that simply don’t make it as visionaries or effective leaders. Twitter CEO Dick Costolo just stepped down from his role, for example, after months of stock-price collapse and questions over whether he had a strategy for leading the company forward. In the current environment, you’re either a good leader… or you risk being replaced.