Threema

NOT ON THE LIST IN 2019

Threema end-to-end encrypts all your communications

Website: threema.ch
Cost: Commercial
Availability: Download app

Past Overall Rankings
2018: –   2017: 131   2016: –    2015: –   2014: –   2013: –
2012: –   2011: –        2010: –   2009: –    2008: –   2007: –