The leading German consumer safety organization Stiftung Warentest has scrutinized the five most popular instant messengers in Germany with regard to data protection and security. The result: Only Threema was deemed «non-critical». The other apps were considered «very critical» or «critical» by the independent foundation. (Zeit online, February 27, 2014)
Threema is the clear winner of the comprehensive messenger comparison by internet security experts PSW GROUP. Other popular messenger services ranked far behind. (it-daily.net, July 26, 2014)