Both are hosted, this is a no go. Both are also proprietary, skype has just taught us why this is a bad idea. In addition, discord is an electron app, I'm going to avoid it as long as I can.
I will answer your question anyhow assuming that you honestly don't know: Electron Apps always desguise as whatever they want to be yet they are a fat Web browser, consume insane amounts of memeory for what they do, are all to often lagging when used. They open the door for script kiddies, and as backed by javascript offer for many great opportunities for extension at the cost of homogeneity and sometimes quality
