Enpose is a super simple screenshot API for the web. In fact, 'API' is probably not the right term. All you do is drop a link onto a page and a screenshot will appear!
It's as simple as that 👆
I'd suggest having some sort of discount to certain users (I believe while it mostly will be useful for businesses, some people might want to use it for their own things), or a special package somewhere. For a startup / organization though it really is a useful tool.
Simple to use, intuitive interface, well documented.
Seems to be missing a support form, and the price, while not necessarily high, might be a hassle for some.