Earlier quoted context omitted.
Wasn't there a privacy problem because of the Australian encryption law [1] and the company being based in Australia? [1] https://news.ycombinator.com/item?id=18636076
It’s just as private as Gmail, which is the comparison in question. If you want secure, you wouldn’t be using email in the first place.
I wouldn't consider them equivalent. Australian laws are some of the most intrusive on the planet and are shared amongst the 5/14 eyes without a warrant.