There are three companies listed on the American stock exchanges with over 1,000 employees who sell products which directly compete with me. (They are, of course, much less important to those companies than they are to me.) Software-wise, there were ~15 shareware products and ~7 web applications last time I checked a few years ago. At least three of them actually know what they're doing (and one of those was launched by a participant from another forum I'm on who, ahem, paid me the sincerest form of flattery).

In a broader sense of the word "competition", my program is a proper subset of Microsoft Excel, I compete with the world's savviest Internet publishers (like Demand Media) for large portions of the queries of interest to me, and a portion of my queries are dual-use for a multi-billion a year industry. (Teachers are not the only folks interested in the top ten for [bingo cards].)

I mean, its not like I went and made a URL shortener or zip file extractor, but I also didn't go make something so staggeringly unique the world had not heard of it before or since.