I like that Signal is open source, but I dislike their insistence on shutting down third party clients, because I believe third party clients are almost universally better than first-party ones.
In addition, their continued reluctance to add an export or any kind of meaningful history backup is also a negative.
I think telegram is a great tradeoff. Not as secure (by default it is not even e2e), but their clients on every platform are just slick and very great.
In addition, their continued reluctance to add an export or any kind of meaningful history backup is also a negative.