Smart-home standards explained: Matter, Thread, Zigbee and Z-Wave

Smart-home boxes are covered in logos: Matter, Thread, Zigbee, Z-Wave, Wi-Fi, Bluetooth, "works with" badges for various voice assistants. They describe different things, some are radio networks and one is a common language that runs on top of them, and mixing them up is how people end up with a drawer of devices that need five different apps. This guide explains what each standard does, when you need a hub, and how to plan a setup that will still make sense in a few years.

Two layers: the network and the language

It helps to separate two questions:

How does the device communicate? This is the radio network: Wi-Fi, Thread, Zigbee, Z-Wave or Bluetooth.
Which apps and platforms can control it? This depends on the "language" the device speaks. Historically each brand and each ecosystem had its own; Matter is the industry's attempt at a shared one.

A device can be, for example, a Thread radio speaking Matter, or a Zigbee radio speaking Zigbee's own language through a hub. Keeping these layers apart makes the rest much clearer.

The main standards at a glance

Standard	What it is	Radio	Needs a hub?	Best for
Wi-Fi	Your ordinary home network	2.4 GHz (sometimes 5 GHz)	No	Plugs, cameras, mains-powered devices
Zigbee	Low-power mesh network	Mostly 2.4 GHz	Yes (a Zigbee hub or coordinator)	Bulbs, sensors, switches in large numbers
Z-Wave	Low-power mesh network	Sub-GHz, varies by region	Yes	Locks, sensors, switches; less Wi-Fi interference
Thread	Low-power IP-based mesh network	2.4 GHz	Needs a Thread border router	Battery sensors, locks, blinds, bulbs
Matter	Common control language	Runs over Wi-Fi, Thread or Ethernet	Needs a Matter controller	Cross-platform compatibility
Bluetooth	Short-range link to a phone	2.4 GHz	No, but limited range	Setup, single-room gadgets

Wi-Fi devices: simple, but with limits

Wi-Fi devices connect straight to your router, so there's nothing extra to buy. That makes them a popular starting point, especially for smart plugs and cameras. The drawbacks:

Power use. Wi-Fi is relatively power-hungry, so battery-powered Wi-Fi sensors need frequent charging or battery changes.
Network load. Dozens of devices can strain an older router. Most smart devices still use the 2.4 GHz band only, so a router that handles many 2.4 GHz clients well helps. Our mesh Wi-Fi guide covers coverage and capacity.
Cloud dependence. Many Wi-Fi devices are controlled through the maker's online service, so they may stop working in apps if the internet is down or the service closes.

Zigbee and Z-Wave: the established mesh networks

Zigbee and Z-Wave have been used in home automation for many years. Both create a mesh: mains-powered devices such as plugs and wired switches relay signals for others, so the network gets stronger as you add devices. Battery devices usually don't relay, which keeps their batteries lasting a long time, often a year or more for simple sensors.

Both need a hub (or a USB coordinator stick for home-automation software) to connect them to your network and apps.

Zigbee shares the 2.4 GHz band with Wi-Fi. Interference can usually be managed by choosing non-overlapping channels. Devices from different brands generally work on the same hub, but not every hub supports every device's features, so check compatibility lists.
Z-Wave uses sub-gigahertz frequencies that differ by region, for example around 868 MHz in Europe and around 908 MHz in North America. A device bought for one region won't work with a hub from another. Lower frequencies pass through walls well and avoid Wi-Fi congestion, and Z-Wave's certification programme has historically made cross-brand compatibility fairly reliable.

Thread: a newer mesh built for the internet protocol

Thread is also a low-power mesh, using the same underlying radio standard (IEEE 802.15.4) as Zigbee. The difference is that Thread devices use IPv6 addresses, the same internet protocol as your other devices, so they don't need a brand-specific hub to translate.

They do need a Thread border router to connect the Thread mesh to your home network. Border routers are built into many recent smart speakers, smart displays, streaming boxes and some Wi-Fi routers, so you may already own one. Having two or more border routers adds resilience if one is switched off.

Thread suits battery devices such as door and window sensors, locks and blinds, because it combines low power use with quick responses.

Matter: the common language

Matter is a standard managed by the Connectivity Standards Alliance and backed by the major smart-home platforms. Its first version arrived in late 2022. A Matter-certified device can be:

Set up with any Matter platform by scanning its QR code or entering its setup code.
Shared between several platforms at once ("multi-admin"), so different people in a household can use their preferred app or assistant.
Controlled locally on your home network, so basic functions keep working if the internet connection drops.

Matter runs over Wi-Fi, Ethernet or Thread, with Bluetooth used only during setup. You need a Matter controller, usually a smart speaker, smart display, phone platform or hub, to run it.

Things to know before relying on it:

Device categories arrived in stages. Lights, plugs, switches, sensors, locks, thermostats and blinds came first; others, such as robot vacuums and major appliances, were added in later versions. Camera support arrived later than most. Check that both the device and your platform support the category you want.
Extra features may stay in the maker's app. Matter covers core functions; advanced settings such as firmware updates or energy history sometimes still need the original app.
Bridges connect older devices. Some Zigbee and Z-Wave hubs can expose their devices to Matter platforms, which extends the life of an existing setup.
Keep the setup code. Photograph the QR code or note the numeric code before the device goes on a wall or ceiling.

When you need a hub, and when you don't

Just a few plugs or bulbs: Wi-Fi or Matter-over-Wi-Fi devices need no hub.
Battery sensors, locks and blinds: choose Thread (with a border router you may already have) or Zigbee/Z-Wave with a hub.
Dozens of devices or a larger home: a mesh standard avoids overloading your Wi-Fi and improves range.
Advanced automations, local control and privacy: a dedicated hub or home-automation software gives the most control, and usually supports Zigbee, Z-Wave, Thread and Matter together.

Planning a setup that lasts

Pick a main platform first and check which standards it supports as a controller.
Prefer Matter-certified devices for new purchases where the category is supported, and look for Thread in battery-powered devices.
Don't discard working Zigbee or Z-Wave gear. These networks remain well supported, and bridges can link them to newer platforms.
Look for local control so key devices, especially locks and lights, don't depend on the cloud. See our guides to smart locks and home security cameras and video doorbells for device-specific advice.
Check update and support policies. Devices need security updates for years, and a maker's app or cloud service can be withdrawn.
Secure the network. Use a strong Wi-Fi password, two-factor authentication on smart-home accounts, and a guest or separate network for devices if your router supports it.

The short version

Think of Wi-Fi, Thread, Zigbee and Z-Wave as the roads and Matter as a shared language that lets different platforms control the same device. For a handful of plugs and bulbs, Wi-Fi or Matter is enough. For battery sensors and locks, choose Thread or a Zigbee/Z-Wave hub. Buy Matter-certified devices where your category is supported, keep setup codes safe, and favour devices that work locally.

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Cover photo: Shixart1985, CC BY 2.0, via Wikimedia Commons