Protocols
Matter, Thread, Zigbee, Z-Wave and Wi-Fi explained for people who want to buy the right hardware once.
Two layers, one confusing conversation
Protocol discussions go wrong because people compare things at different levels. It helps to separate them.
Network layers decide how devices physically talk: Wi-Fi, Thread, Zigbee and Z-Wave. They determine power consumption, range, whether you need a hub, and how many devices your network can carry.
Application standards decide what a device says: Matter is the important one here. It is a shared language that lets a device work in Apple Home, Google Home, Alexa and SmartThings at once, regardless of which network it uses.
So "Matter or Zigbee?" is not a real choice. Matter is what you want written on the box; Thread, Wi-Fi or Zigbee is how the device gets there.
Matter
The cross-ecosystem standard backed by Apple, Google, Amazon and Samsung.
Thread
The low-power mesh that carries Matter for battery devices.
Zigbee
The mature 2.4 GHz mesh used by Hue, Aqara and countless sensors.
Z-Wave
A mature, tightly certified mesh popular with installers and hubs.
Wi-Fi (and Bluetooth)
Direct-to-router devices: simplest to set up, heaviest on your network.