cross-posted from: https://piefed.social/c/privacy/p/1774168/what-is-the-best-private-messaging-app

Hello i am looking for a private messaging app to chat with my family, What would be the best option to use I want it to be decentralized, user-friendly and have good and secure E2EE, must be free as in beer and open source, I have used matrix and didn't like it because of encryption issues, I am currently using XMPP but I am having issues with image uploads and image downloads, I am considering deltachat and it seems to be the best option, if anyone has any suggestion that is better i would appreciate it.
EDIT: i tried out all the recommndations and simplex was both the best for me and my family liked the UX more than the other ones