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.

Twitter has purchased email newsletter technology vendor Revue.  It may seem an odd adjunct to Twitter’s core business, but the company points out that many journalists rely on Twitter as a source and outlet, so newsletters will help them further interact with their audiences.

It’s deal-making time for generative AI model builders and publishers who can provide them with quality data.  Germany publishing giant Axel Springer is trading access to its data for Microsoft adtech, AI, and Azure hosting solutions.  Meanwhile, The Financial Times has struck a deal with OpenAI to license its content with attribution of summaries and quotes.