Glassdoor provides insights about jobs and companies derived from current and former employee reviews. Their website states that they “offer insights into the employee experience powered by millions of company ratings and reviews, CEO approval ratings, salary reports, interview reviews and questions, benefits reviews, office photos and more,” and that their methodology factors include the quantity, quality, and consistency of these reviews. In an email sent to Refinery29, Glassdoor says that three of the common themes among their top places to work winners include mission-driven cultures, transparent senior leadership, and career growth opportunities for employees.