Ask HN: Are Glassdoor reviews a reliable indicator of a company's culture?

A with most systems like CSATs and NPS Glassdoor ratings reflect the extremes, those who have an axe to grind and those with an investment to protect the brand of the company reviewed. Could be competing company shills, disgruntled employees, those with emotional investments related their self-worth and such. The truth always lie somewhere in between. The best thing to do is to talk to employees and use your gut in the interview process or during your decision to support the company as a customer as you interact with people there.