Rocket.Chat Raises $19 Million for Open Source Collaboration Platform

Open source, highly secure collaboration platform Rocket.Chat has raised $19 million, more than double its previous total of $7.9 million.  The system positions itself as a Slack alternative that supports all types of communications, integrates easily with other platforms, and protects privacy by letting users host their own data.  The Brazil-based company says the system is installed on 845,000 servers in 150 countries.