There is a payment option inside the app. It uses Stripe to process the payment.
sylphio
Nice deals! Thanks for sharing.
Does anyone knows of something like that based in Europe?
Matrix is in the process of being adopted as the MIMI standard by the IETF. At least it was one or two months ago.
There is also Element Call at call.element.io. I have not tried screen-sharing but it's worth a look.
Securely sharing end-to-end encrypted messages between devices is inherently difficult, especially combined with device verification. Note the 'secret chats' of Telegram are not shared across devices.
As far as I know, Matrix is the only network that has solved this problem. It even has cross-signing and federation.
FairEmail is the best email app I've ever used.
'...and Krillin dies.'
qpdf is the best CLI tool that I have used to edit the structure of a PDF. I recommend it if you don't require a GUI, and do not need to edit the content.
https://github.com/spantaleev/matrix-docker-ansible-deploy makes it easy to deploy.
Not sure about the RAM limitation. If Synapse is too heavy, perhaps a different server (Dendrite?) will be light enough.