Pros
Great mission, which attracts some great people to work with.
Cons
Culture is terrible due to the founder. Founder dangerously accuses people of bullying to get her way, micromanages every single person in the company, boldly lies (and gaslights), screams at employees, pits people against each other, harshly criticises employees under the guise of "feedback culture" with no concrete examples. Her behaviour permeates through the whole company. It is shocking this can happen in a workplace, let alone a mission driven one. She has no respect for experience and chooses instead to hire yes men and fires any real managers as soon as they ask too many questions or she doesn't get her way. So expect multiple managers to come and go and to be micromanaged by her, all in in which makes for a very unsettling environment. You will have no job security as the founder will never be transparent or honest about the companies finances.