[JohnKacz]

> isn't open

Their privacy page (in the comparison table) claims they are open source. I didn't see any links to their code however.

edit: Sorry, reading on mobile (after just waking up) and didn't see the link. Thanks @ukblewis

[ukblewis]

Dude, read the webpage before you comment, they link to it: https://github.com/wireapp

[chrisxcross]

Well, they seem to have some opensourced some of their code. But they are far away form being free software although they claim to use the GPL. If I can't build the software myself, I won't use it.

[xiphias]

It means that it's partly open source, which means that the marketing material is lying. It's OK for a company to not be 100% open source, but it's not OK to lie, especially if trust is needed.