[desfan]

I personally like Wickr (https://www.wickr.com). Although they're not as open as Signal, they've also passed several security reviews and I do like their transparency reviews (https://www.wickr.com/about-us/blog/2016/08/01/wickr-transpa...)

[aorth]

A recent post about Wickr's bug bounty program painted them in a pretty poor light. The company appears to have invited security researchers to contribute to a bug bounty program and then, after researchers found and reported dozens of issues, the company fixed the bugs and never paid or credited the researchers.

https://www.vulnerability-db.com/?q=articles/2016/10/27/wick...