I'm wondering: is the code open source aka. peer reviewed? Anyone can code something they themselves (or the dev. team) cannot break. Using open source, like providers of the mos secure systems do, any flaws will be pointed out by the mass, thus creating a really secure system. not just a system that's secure according to the people who developed the system. One of the most used phrases for not provinding full access to the source is: 'the source is our IP'. One way to still make money is provide the code open source, while noting the code may only be re-used or modified for non-commercial purposes. Which ensures the party provinding the code can still make money, if they designed a good product.
Hope to receive an answer soon, since open source is the most secure way. Keeping the cards / code to your chest isn't.
ps. I used a non existing email. Thjere's no need to put my email in a database when I'm not sure if I want to make use of your services. Besides: the question will be posted public, so I can check back myself to see if it has been answered and, hoping the code is open source, decide to go ahead with using your service.