Looking for options and opinions on which zigbee brands to stick with

Are the IKEA devices natively supported or do I have to get a smartapp and DH?

A little google fu found me this IKEA tradfri outlet

I’m interested as it’s 10 dollars on the website, I could buy a few of those and then some of the sensors if it’s just as easily added.

I didn’t see any open/close sensors so I’ll have to look around for that.