My gut says, he's your brother, if you don't know if you want to have him as a cofounder, it's unlikely that you should partner with him. I've known plenty of

My gut says, he's your brother, if you don't know if you want to have him as a cofounder, it's unlikely that you should partner with him. I've known plenty of cofounders that had personal relationships to their cofounder and they were fine. My suggestion would be to do a mini startup that builds on the skills you plan to use, but is not a startup either of you are personally believe in doing. Give it 100% each, and see what happens. Beyond that, there's lots of advice on being a good cofounder online, but in the end, most of that is covered by just having a good startup/business and. It being an pain to work with.