Peerio might work, but it hasn't been vetted too much yet:
It's made by the CryptoCat author, so make of that what you will.
It's made by the CryptoCat author, so make of that what you will.
Literally the second tweet on their twitter account is 'Damn, it works. Got a lawyer who resisted all other methods to encrypt our comms with @Peerio. Big score for usability. Bravo @kaepora & co.' which kind of bugs me, too.