Pros
The company has survived economic downturns by knowing when to be frugal. There is good investment in R&D, which allows for continued relevance. While trying to expand scope, there is still focus on the bread and butter core email business. Compensation and benefits are fair, with moderate improvements over the years. The private equity acquisition is giving investors a quick boost and may allow for a bigger sale or reboot in the future.
Cons
While trying to expand scope, Proofpoint is still fundamentally an email security company; this limits the potential of acquired technologies. Acquired tech is integrated well, but potential is lost by focus on how it relates to email. Comments, here on Glassdoor, about too many layers of management filling out spreadsheets, and little diversity in management are true. The bro culture here is strong.