Ask HN: Is Backupify safe and/or necessary?

I am a longtime subscriber to Backupify because I have a huge amount of mission-critical data stored on a free Gmail account (I am slowly moving to a separate Google Apps Suite account on my own domain). Google sent a security message saying I should turn Backupify off because it has access to everything on the account. That's necessary for backup purposes, but Backupify seems vaguely shady. They send absolutely no monthly stats on what's backed up.

Is there a safer way to back up Google content? Is Backupify trustworthy?