I worked at Google in the past, most recently ending in early 2015, and can confirm that the answer to this question was yes when I was there - presumably still the case today with different details.
I have no idea whether the procedures were followed in this case, nor do I have any other inside information on this story, nor am I speaking for Google or Alphabet here.
Everyone just launched tools internally, although it was pretty easy to get approval to launch something externally, although most people didn't bother. The environment back then had tons of internal tools all over the place.
It seemed to mostly work. Some people complained it was too slow, others seemed to manage fine.
I think Chris DiBonas’ team ran all of that.