NarendraCzarits even more outdated
7777AKASignal is the best.
The thing it’s missing the most is better multi device support and an updated desktop client.
For me, I think Matrix is more complete (specially since it backs-up your chats and media encrypted). The only thing it’s lacking (at least Element specific) is encrypted chat search support on mobile.
What matrix is missing is anyone that I know. Ultimately that is way more important than features in a messaging client.
It has bridges for most messaging services so you could use a matrix frontend for most of your messaging needs without having people on matrix so long as the server admin has set up those extensions