Wait, looking further either you've obfuscated most of the info in the post, or I've been looking at the website of your competitor that offers exactly the same functionality. If it's that last one, you could look up his turnover at the KvK to estimate his market share. He seems to have had quite a bit of press coverage too, so if he can't turn it into something big, either he isn't trying very much (quite likely) or it's really a hard market (also likely :) )