Coro provides multi-aspect security for businesses that, in particular, contain anti-phishing protection.
All emails of the customers' users are scanned for phishing and additional malicious content, and emails that are flagged are moved to dedicated folders. Furthermore, the IT personnel of the customer are informed about such suspicious emails and they can decide on their deletion from the users' mailboxes.

The purpose of the Coro add-on for Gmail is to allow users to report to their IT personnel on purportedly malicious emails that have been missed by the Coro protection, as well as to report on emails that have been flagged by the Coro protection yet the user believes that the flagging was wrong.