It's difficult to put a finger on what exactly makes employees happy, but career community website Glassdoor just released its list of the best companies to work for in 2013. The list is based completely on employee surveys.
As usual, tech giants Facebook and Google both land within the top 10, but the rest of the top companies come from a wide range of industries, including fast food and travel.
Glassdoor says its anonymous surveys touch on topics like "career opportunities, compensation & benefits, work/life balance, senior leadership and more."
Check out the top 15 best companies to work for in 2013 below: