skype
I am not sure, but months ago I installed Skype in Ubuntu and it automatically pulled chat history from the cloud which means it did.
However, lately my hard disk installed with Windows 7 broke. Now I am using my old backup HDD, which has Windows 7 and Skype already installed, but no matter how I try to retrieve chat history it couldn't?
I'm not sure if this shows the entire history, but try the following. Whether the contact is online or offline, pop up the chat window.
Then click "All" under "View earlier messages:".
Alternatively, click the gear icon for the contact and select "View Chat History". That generates an html file that is opened in your web browser window.
The reason I'm not sure if this shows all the history is because I can't fully remember when my chat history began on this computer.
Best Answer
No they don't.
(source)