We respond to all candidates, in all stages. Now to be honest - we use greenhouse, and their tooling for recruitment workflow is not bad. A decision to accept/

We respond to all candidates, in all stages. Now to be honest - we use greenhouse, and their tooling for recruitment workflow is not bad. A decision to accept/reject will always trigger an email. Of course we've templated our own custom responses, but editing the outgoing email before sending is also easy enough. As for interview feedback, I personally write my interview notes in such a way that if the candidate asks for more detailed feedback, the notes can be pasted pretty much as-is. When the hiring workflow and candidate communication are intricately linked, things are less likely to fall between the cracks. Everyone feels better.