Rapportive is a Gmail add-on. It shows information about the person who sent an email. Think of it as basic CRM (customer relationship management).
Rapportive’s data replaces Gmail’s right-hand advertising panel – which won’t endear Rapportive to Google.
Rapportive pulls information from social media accounts linked to the person’s email. This means the results are variable. I’ve noticed plenty of information and even photographs for some of my contacts, but for many there is nothing.
I’ve written before about Xobni and about Gist, which is more complex.