[tdeck]

In my experience Glassdoor numbers are low. They've been low compared to the reality at places I've worked, at least.

[swiftcoder]

They uniformly underestimate big tech compensation by 50%+, because they've never clearly delineated salary from total compensation (and stock grants are a majority of comp for a lot of senior FAANG employees).

Luckily levels.fyi has fairly accurate data for those same companies.