The career website Glassdoor collects anonymous reviews and data from employees about the companies they work for. Whether they praise their management or gripe about office facilities, Glassdoor has been an outlet for people to get a pretty clear idea of what it's like to work for somebody.

For the seventh year in a row, Glassdoor has released its annual Employees' Choice Awards, naming the 50 best companies to work for based on salary, employee benefits and other perks.

Glassdoor put together the top 50 list by taking into consideration anonymous employee ratings on how they felt working at their company, career advancement opportunities, compensation, benefits, work-life balance, office culture, and how they felt their CEOs were leading them.

There are, of course, some surprising revelations from this year's list. Although in the past, tech companies dominated the top 10 names, this year only Google (No.1) and F5 Networks (No.4) made it to the top 10.

Twitter, which was at No.2 last year, did not even appear on the list at all. The microblogging company's restructuring woes since it turned public and the apparent lack of direction pulled it in a downward spiral that has left employees feeling like the company doesn't have any goals for the future and is "full of chaos."

Facebook landed on the No.13 spot -- a significant drop from its No.1 ranking from 2011 to 2013 and No.5 slot in 2014. Employees have consistently reported that both Facebook and Google "compensate their engineers very well" so the mention of both companies higher up on the list is not surprising.

All in all, tech companies ruled 14 spots in the 2015 roster. The full list names Bain & Company and Nestlé Purina PetCare the second and third best companies to work for, respectively.

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