yes, by default messages get encrypted and then encoded into base64 on the client side before they are sent to the server.
what happens to a message after it has been read?+
each message is deleted from memory upon fetching its contents, this means that even if your decryption keys are bad it will still be deleted.
where are messages stored?+
messages are stored in memory on the server, meaning the messages are never saved to a file system. however as memory size is limited, your message may get deleted to allow new messages in. oldest message gets deleted first.
what data is processed?+
the only other parameter apart from the message contents (encrypted by default) is time of when a message was created, this is to allow deletion of messages in memory allowing oldest message to be deleted first.
are you using any trackers or loggers?+
no, your privacy is valued. no cloudflare proxying or anything like that.