Some parts of companies can be corporate and still have some other very good parts.
All being said, if at that stage of a job offer, you don't want to be looking like the most important thing to you are your options. If you get a decent salary and like the work, you are not being exploited.
Then don't work for those companies.
Ones goal in life should not be to get exploited at shitty startups as a "rank and file" developer (aka chump).