While it's certainly lame to find that somebody has cloned your application, I don't think you should spend any time worrying about these guys. Your Business i

While it's certainly lame to find that somebody has cloned your application, I don't think you should spend any time worrying about these guys. Your Business is the important thing to think about, and there's nothing these guys can do to touch that. They can't duplicate the marketing you've put in, the goodwill of your established customer base, or your reputation in general. All they can do is put out an application, and start from scratch just like you did back when you launched. You executed well. Chances are they won't. As developers, we tend to think in terms of code, so seeing a feature-by-feature clone of our software is hard to take. Trust me though, if you're at all successful you'll see plenty more of these clones popping up. Think of how many Basecamp and Fogbugz clones are out there. 37 Signals and Fog Creek are not in the least way threatened by them, and don't spend even a minute fretting about them. I'd advise you to follow their lead.