In case you were considering SimpleX, this is an actual quote from its founder, in response to criticism about their misleading marketing:

"Most marketing is to some extent exaggeration, and you are saying that we are not allowed to exaggerate at all."

Certainly not someone I would trust with private communications, with that attitude.

(Source: https://github.com/markqvist/Reticulum/discussions/367#discussioncomment-9088499)