Thanks everyone for the feedback! I made this tool for myself and other entrepreneurs, not just lawyers. Last year when I was negotiating with investors I often wanted to diff their changes against my original forms. A tool like this would have helped me.

I recognize that there are many challenges involved in selling to lawyers, and I'm talking to lawyers about that. Here on HN I was hoping I would hear about how DocCompare is or isn't helpful to entrepreneurs, investors and hackers.