Skype too. Skype stores your voice mails and video messages forever[1]. I’m not sure about text messages, but I wouldn’t be surprised if they store all messages

Skype too. Skype stores your voice mails and video messages forever[1]. I’m not sure about text messages, but I wouldn’t be surprised if they store all messages even if both the sender and recipient deleted them. [1] Details: Clicking on Preferences -> Privacy -> Delete history (OS X), or Options -> Privacy Settings -> Clear history (Windows) pretends to delete the voice/video messages but it merely hides them from your view. If you re-install Skype on the same computer or run Skype on a different computer, all those "deleted" voice mails and video messages re-appear. The delete and clear buttons don’t do what they claim.