My Google accounts have been around for a couple of decades now, my Microsoft account about the same amount of time.

Though actually I think the Xbox live part of my account predates the rest of it—iirc they weren’t originally linked.

My steam account is about the same age too come to think of it, I remember getting it before hl2 was released

eBay and Amazon are older too actually, maybe made those back in 2002/2003

Does my online banking count? I’ve potentially had that even longer