Pros
The company is absolutely thriving. As a current employee of PitchBook I find most of the posts laughable. As a fast growing company, there are times when certain people can not keep up and they feel it necessary to take a shot at the management team on the way out. Employees (regardless of age) are given responsibility and make an impact immediately. Those who work hard and prove themselves are promoted quickly and PitchBook is very serious about promoting from within. Those who have posted negative comments on Glassdoor will probably continue to post negative comments about their next employer, and their next employer. The talent that walks in the front door every day is truly second to none. There is a reason why people have, and are leaving some of the best tech companies in the country to come work at PitchBook. If you are serious about making an impact and what to make your mark on a company I would highly encourage you to come meet the PitchBook team, you won't regret it.
Cons
Due to the rate at which PitchBook is growing the office seems to be shrinking.