In general words, we can say that Plupper is a chat service that you can integrate into your site to keep visitors interested, and also in order to gather feedback on the overall experience that users have at your site. This application is available as a service, and it is fully scalable – three paid plans are available in addition to the ever-present free version for testing purposes (it is limited to a single operator).
Features of Plupper include multilingual support and the ability to transfer conversations to the most capable operator that you have in the team (every plan other than the free one supports an unlimited number of them). Besides, the work of operators is simplified by the co-browsing capabilities that the service has by default. That is, the operator will see exactly what the person at the other end of the connection is seeing and he will be able to guide him more easily along.
In addition to that, you can define both welcome and offline messages for the chat window in order to make visitors feel that little more warm. And you can design your own buttons, too.
Plupper.com In Their Own Words
“Plupper is an integrated single point of contact software which makes the communication with customers or web page visitors simple.”
Why Plupper.com It Might Be A Killer
A service like this one makes for interacting with your customers and measuring the overall perception people have regarding your site.
Some Questions About Plupper.com
What is the best plan for a medium-sized company? 
