I'm in a similar situation that you are in. The pros and cons I currently see. Both: Have a great company culture. Have awesome smart, employees and have inte

I'm in a similar situation that you are in. The pros and cons I currently see. Both: Have a great company culture. Have awesome smart, employees and have interesting problems to work on. Facebook: Is a rather large company now so you won't learn as much. It does have extremely interesting problems though and does have smart people so you will learn a lot. However, facebook is most likely overvalued, so if you join facebook, it is highly unlikely you will get rich off of the stock. Palantir: Has one of the most excellent engineering teams I have ever met. They have the best team I have seen in terms of algorithmic problem solving ability. They have an awesome company culture and great perks. Whereas facebook is the current hot place to work, I could see Palantir being the next hot place to work. The one major downside of Palantir is that they work on enterprise software and thus, the product isn't as cool to the general consumer. Most of the people on this thread have no real idea what Palantir does and just assume that since they work for the government, their work isn't interesting. You'll have to deal with this because truthfully, their work isn't well understood and isn't as sexy as facebook.