Don't compare to what your friends are making, compare to what you need to make to live well and save up for early retirement. If you'd earn double but would also spend double in a year from now, you're not in great shape financially. Look into your financial spending history, and make up your mind.

Anyway, all three companies are doing evil in the world, as far as I'm concerned, so I'd rather stay with the startup. Then again, I'm just your average freetard open source / freedom advocate.