Doing business with your best friends — does it work? People have strong opinions about never doing business with friends. I disagree. Having a great co-founder relationship has been one of the keys to our success at Proof over the past couple of years.

During our time at Y-Combinator, I noticed one of the prime reasons for early startup deaths was a result of co-founders not getting along. Our co-founder relationship isn’t perfect, but I want to share with you what has worked for us in our relationship. And it doesn’t just stop at the office, but it carries over into our personal lives as well!