Hi all, we are launching We Use That and would love any feedback. More cool companies to come and anyone can submit their company via pull request https://github.com/weusethat/we-use-that
I can see how it wouldn't be all that useful to have a full stack of Oracle and Peoplesoft, but a lot of big companies are built on the same stuff that startups use.
(on the other hand, really large/mature companies are likewise uninteresting, because their choices are almost certainly entrenched in historical BS and legacy nonsense.)