When comparing Messenger vs Brosix, the Slant community recommends Brosix for most people. In the question“What is the best team chat software?” Brosix is ranked 51st while Messenger is ranked 74th. The most important reason people chose Brosix is:
Brosix uses strong 256-bit encryption that secures ALL communication channels.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Uses Facebook friends to create a contacts list
Allows communicating with anyone who's a friend on Facebook.
Pro Read receipts
Can see who has seen each message in group messages.
Pro Easy to share posts from Facebook
Integration with Facebook makes it easy to share any interesting posts from the Facebook timeline.
Pro Great UI
User interface of the application is clean, intuitive and easy to overview.
Pro Excellent solution for companies who would like to encrypt their office communication
Brosix uses strong 256-bit encryption that secures ALL communication channels.
Pro Brosix is available on all platforms
This includes Android, iOS, Linux, Windows, Mac.
Pro Easy to use
Brosix IM facilitates the internal communication and increases office productivity.
Pro Affordable
For $1.70 per user per month voice & video chat, screen-sharing sessions, send unlimited files regardless of the size, etc.
Pro Great admin tools
The Enterprise version of Brosix allows the Administrator to manage their own and unique network. The Admin has also full-control over the archives of all chats within the network.
Pro Easy to use
Cons
Con Lack of privacy
Messenger is owned by Facebook. Based on their privacy policy, this means that any information you provide (including messages sent) are used by Facebook to profile you and sell access to your data to advertisers.
Con Lack of end-to-end encryption
Secret (end-to-end encrypted) chats are only supported in one-to-one messages, and are not enabled by default, and the encryption has not been verified independently.
Con Not enough Admin controls
Con Poor mobile version
The mobile version of the application contains only a few of the features that the Desktop client has.
