In the end, they hold the keys irrespective of how many algorithms they wrap on top. I do not feel it is any different from Google Chat, Twitter DMs, etc. They

In the end, they hold the keys irrespective of how many algorithms they wrap on top. I do not feel it is any different from Google Chat, Twitter DMs, etc. They do have a lot of censorship resistant and anti-MITM attack features in between, but they hold the keys by default I use it for convenience and amazing features, not for security!