The idea of co-founder matching feels like a dating app for rushing into marriage. It is definitely possible it can work out but it seems like a long shot. If I were going to start a startup today, I'd want to do as much as I could to validate the idea and use that data to persuade some people whom I've had great working relationships with. Whether that's in school or the workplace etc… If you are unable to do that, you're going to have a really hard time recruiting good talent. You also want to know what it's like to have a disagreement with the person you're going to be in kind of a marriage with. Don't have your first fight after marriage.