WhatsApp sounds like "what's up" - it definitely suggests conversation

The other two are meaningless, but at least monosyllabic - "I'll Skype you," "I'll Slack you," "I'll ... Element you?"

I plan to use a phrase like 'lets connect on Element'.

Element is a much better name than Riot. Lot less of a hard sell to convert normies.

Yeah, I guess the polysyllable "hop on a Zoom call" has already entered the corporate lexicon, and "hop an an Element call" could just as easily displace it.

I’ll zoom you also sounds weird unless you know zoom is a telecommunication app, and it sounded weird until people started using it. “I’ll start an Element call with you” won’t sound weird after people start using it.

"I'll Riot you" is also a non-sequitur at best

Perhaps less confusing than Signalling someone :)

You shouldn't say that anyway, since the protocol is called Matrix

IRC = internet relay chat

chat does sound like messaging

Skype sounds like a made up word. Nothing wrong with that.

Also (as far as I know) the term "IRC" wasn't created as a product name intended to represent the protocol/service to potential customers. It was just an abbreviated descriptor of what it was.

The point of having a made up name that has nothing to do with the thing it is about is that it makes defending a trademark easier.

or kik or discord

Discord=argument=discussion

Discord may be starting to regret their own name as they finally move away from gamer-centric branding and start broadening their marketing.

I wouldn't use "discord" as synonym for "argument" more like "disagreement" ie. the argumentation phase is over.