I would like it to be true that solo founders have just as much chance of success. I have been unable to find a cofounder for years, and I am not biased against solo companies. People are unpredictable, and even wildly successful companies have some disheartening back stories. I've learned that from books like Idea Man (Microsoft) and Masters of Doom (id Software) where founding members got screwed by morally challenged cofounders. In the case of id, Tom Hall received nothing from id in the end, and forfeited all of his equity when he was fired. Because they decided he wasn't needed anymore, despite him being there from the beginning through the tough times.

But it stands to reason that you are better off if you can find someone who is honest and is going to work hard with you, simply because two heads are better than one. When used together at least. Emphasis on honest, I would rank trust and ethics over experience and intelligence.

If you can't find that person, and you are determined, then may as well go ahead and go it alone. You only live once. Just realize the odds are stacked even higher against you. You are only lying to yourself if you refuse to accept that truth.

And you can be a cofounder of a successful company, but still fail miserably and have it all taken away by a bad cofounder.