Communicating securely over the internet is a must. This article compares available and actively-developed projects that are used for secure communications. Favor is given to platforms that support group-chats, but pure 1:1 communications are discussed as well.
Matrix
I have not bothered to study Matrix closely because the only times activists have invited me to a conversation it was on the #Cloudflare instance (matrix.org). That really drives up the investigative effort I have to do in order to trust it because Cloudflare Inc sees everything under that TLS layer. I assume payloads are e2ee but the payload isn’t everything. It’s also sketchy because if everything is e2ee then there’s nothing for CF to optimize by caching, so it seems like a senseless move. When Matrix first emerged I instantly lost respect for everyone working on that project because it sends a loud message that there’s a competency and awareness problem. They don’t know their audience. If they don’t understand the issues with Cloudflare then they are probably not well informed in other ways. It’s a serious optics problem to say the least.
The UK mirrored the GDPR with just a few minor changes.
XMPP
#Snikket has those features.
Missing platforms
yup never used matrix.org… https://hackliberty.org/register https://chat.hackliberty.org