As a CEO you are paranoid with competitors who are doing things that are very similar to what you are trying to do. But that is usually not the competitive differentiation you need to emphasise in a sales presentation, especially if you are a tiny startup.

The real challenge will often be to get the client to break away from her current practice. Either a big established product, or maybe she is not investing at all in the sort of solutions you are trying to offer.

In my case as the CEO of presentation app SlideMagic, I could pitch it against other new and small presentation solutions that are out there in the market. But that is not the choice people need to make. I even would not consider PowerPoint to be my competitor for a feature-by-feature comparison. I am competing against the inefficient approach to presentation creation and delivery in corporations. And that is a real challenge :-) 

Art: The Chess Players, by Thomas Eakins