[bradleyjoyce]

The danger of NOT bringing on a technical co-founder is that you're then dealing with a different type of developer/tech person. This technical person is generally the type that gets (or could get) paid good money.

So as Travis mentions in his comment, if you don't have lots of cash on hand, you could run into problems. There is really no shortage of jobs available to developers, and chances are many jobs out there will pay much better than what you can afford to pay at your startup. Unless you find the perfect person who doesn't mind making less than he/she probably could and is still 100% dedicated, you'll probably have a high turnover rate.

In contrast, you can generally assume that a co-founder is going to give you 100% all the time as they theoretically have a lot of skin in the game.

In many startups, you probably don't need a technical co-founder, but you probably should have one anyway.