| Gmail's access settings do allow app developers and data companies to see the user's emails and the private details that go with it, like the recipient's address and time stamps. They can actually even view the whole message. And while application does require user consent, the permission form is admittedly vague on letting humans read emails instead of just machines.
These third-party developers claim to only use the information gathered from Gmail account holders for advertising purposes and targeted shopping suggestions. Google asserted that it has extensively vetted these developers, a process that entails checking that the company's identity is represented by the app, that the data requested is in line with the service it offers, and that its privacy policy clearly states that it will monitor emails.
The Wall Street Journal report mentioned two specific apps that had access to said emails – Edison Software and Return Path. The former reportedly had employees read thousands of emails to assist in the training of its “Smart Reply” feature while the latter also allowed staff to read private messages to help in the development of the company's software. Both companies said they have permission from users and that their actions were covered in their terms and conditions. Read More | 
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