I'm in the USA and like the the Sengled smart plugs. They use Zigbee, can handle up to 1800W, and are ETL listed. Having said that, it looks like they don't sell the ones I have any more. I don't have experience with their newer ones.

Just make sure whichever ones you get are ETL or UL listed. There's some that are cheap but haven't had any sort of safety testing done. It's not worth the small savings.