Mandrill operates as a startup within MailChimp. It’s a product that’s both complementary and potentially disruptive to MailChimp, and we think the best way to deal with that tension is to press into it as hard as we can. So we cannibalized our own engineers and isolated them from the MailChimp team, allowing them to focus all their energy on this big new opportunity. As a result, Mandrill is evolving fast.
I have to say I warm to this frankness hugely.