"We don't have any competition. We're a truly a one-of-a-kind company." I've heard that line from clients for years. I wish it were true, but it's simply not. In fact, it wouldn't matter if you held a monopoly on your particular product or service; you'd still have competition. How? Because your competition doesn't come from a singular source.
There may be no other businesses that sell the product or service you sell, but you still have competition. Once that's understood you have a greater advantage when it comes to copywriting. You can recognize the other options your customers have before them and can position yourself as the only logical choice.