We just got one. Co-founder isn't about the title, it's about the state of mind.
Our company started with having a local dev firm doing initial coding, then we got him to do some work on the site on nights. Then he decided he really wanted to give it a shot, and I welcomed him with open arms. He gets a ton of equity and is a co-founder in my mind: there are no secrets, no employer/employee relationship. Yes, I spent a ton of my own cash to get the business off the ground, but it only has a chance at success with a full-time partner. So he's a co-founder in my mind, and publicly.
Our company started with having a local dev firm doing initial coding, then we got him to do some work on the site on nights. Then he decided he really wanted to give it a shot, and I welcomed him with open arms. He gets a ton of equity and is a co-founder in my mind: there are no secrets, no employer/employee relationship. Yes, I spent a ton of my own cash to get the business off the ground, but it only has a chance at success with a full-time partner. So he's a co-founder in my mind, and publicly.