Facebook's Mark Zuckerberg on Friday was ranked top chief executive in a Glassdoor survey of what current and former employees think of how top bosses are leading companies. Zuckerberg had a near perfect approval rating, with 99% of Facebook workers endorsing the way he is running the world's leading social network, according to Glassdoor, an online community devoted to careers and workplaces.

A Facebook software engineer who gave Zuckerberg a five-star rating listed pros that included "the company lives up to its motto of move fast and don't be afraid."

In counterpoint, the engineer told Glassdoor that Facebook has a "hardcore environment, if you don't deal well with extra responsibility and require strong leadership instead of autonomy you probably won't have the best time."

Glassdoor gathered employee reviews during the past year for the annual ranking of chief executives.

SAP co-chiefs Bill McDermott and Jim Hagemann Snabe were ranked just a hair behind Zuckerberg while Google co-founder and chief Larry Page was in eleventh place with a 95 percent approval rating.

Amazon.com chief Jeff Bezos and Apple boss Tim Cook ranked 16th and 18th respectively, each endorsed by about 93 percent of their workers.

"It's a big company and sometimes the little guys get lost in the shuffle," one former Apple employee noted while giving the Cupertino, California-company a four-star review.

"Lots of non-Apple people working at the company now, so the Apple culture is being diluted by 'beige box' mentality."