As a consequence of the PRISM scandal many users are worried about the protection of their privacy, and how safely service providers handle their data.
Probably most user data of messaging apps can be monitored
It seems that if you are not a USA citizen, the government and its agencies have less restrictions in regard to what data they can monitor. If you are a citizen of the USA, there seem to be more restrictions on how they can access your data.
Generally it is likely that the agencies get quicker access to companies based in the USA. In other countries legal hurdles will prevent a quick and direct access to a user’s data.
While reliable information is hardly available, not only big companies like Facebook, Sykpe, Google, Twitter, AOL, Microsoft, Apple, Yahoo, etc. are affected by PRISM, but probably as well many smaller service providers including the ones offering messaging apps and services.
Privacy and data protection unlikely with messaging app providers from the USA
Thus, most messaging app providers from the USA could well be affected by PRISM. And just to remember, some of them often haven’t had a history of being secure.
Overall, from a privacy perspective this can be worrying. It is not that the normal user has something to hide, but that her content and data might be monitored and stored somewhere without her knowledge.
Messaging services with end-to-end encryption from other countries beneficial
Of course, people could turn to encrypt their messages, but many of the messaging apps offering encryption are not easy to use or not performant enough to be competitive. iMessage and Facetime are some of the exceptions which are said to be end-to-end encrypted. However, if Apple really has no master key to unlock your data, remains an open question.
If you are worried about your privacy, it is maybe worth taking a look at European messaging providers (for more info please read our secure and private sharing article). Some European countries like Germany have pretty strong law with regard to privacy and data protection. This could well be a safe harbor.