The company behind M&M's, Snickers, Twix, and Skittles seems to have a pretty laid-back office vibe. For one, you can bring your dog to work (this may have something to do with the fact that Mars also owns a large portfolio of pet food brands). And, according to one employee quoted by Fortune, "all of our desks are open layout, and everyone is like a family in this together. We have the freedom to come and go as we please and no one is micro-managing us or checking to make sure we are doing what is expected."

Fortune and Great Place to Work chose their top 25 workplaces by compiling all of the written reviews that were submitted anonymously by a total of 2.7 million employees in 51 countries. Companies are then scored on "respect, fairness, pride, camaraderie, and trust," and bonus points were awarded to multi-national organizations that had already appeared on previous Best Workplaces lists in multiple countries.