What is Z-Wave?

A smart lock that still works when the internet drops, or a whole-home alarm that never loses its sensors, is often running on Z-Wave. Z-Wave is a low-power wireless protocol for smart home devices, and it is Zigbee's longest-standing rival. It does the same core job, letting sensors, locks and switches talk to a hub, but it does it on a quieter radio band that trades device choice for range and reliability.

How Z-Wave works

Z-Wave is built around the same idea as Zigbee. Mains-powered devices relay messages for their neighbours, forming a self-healing mesh that reaches further as you add more. The difference is the radio. Z-Wave runs on a sub-GHz band, well below the 2.4 GHz used by Wi-Fi and Zigbee, so it faces far less interference and travels further through walls.

The setup mirrors Zigbee too. A controller, the hub, builds the network and passes messages to your phone. The mains-powered devices act as repeaters. Battery devices like door sensors sleep between reports, which is how they run for a year or more on a coin cell.

Where Z-Wave came from

Z-Wave started with a Danish company, Zensys, which built the technology in the early 2000s. Sigma Designs bought Zensys in 2008, and in 2018 Silicon Labs took over the Z-Wave business, where the chips are still made today. The standard itself is run by the Z-Wave Alliance, which became an independent standards body in 2020 and published the specification so other companies could build on it. In practice, almost all Z-Wave silicon still comes from Silicon Labs, so it is more open on paper than on the shelf.

You need a hub

Like Zigbee, a Z-Wave network needs a controller, the hub that pairs devices and routes their messages. Many smart home hubs, and Home Assistant with a Z-Wave stick, include one. Z-Wave has long focused on security devices, so its hubs and locks tend to lead on strong encryption.

What Z-Wave is good at

Z-Wave has quietly run locks and alarms for two decades, and its strengths follow from that focus.

• A quiet radio band. Sub-GHz means less interference and better range through walls than the crowded 2.4 GHz band, so fewer dropouts.
• Strong security by default. Every certified Z-Wave device since 2017 uses the S2 framework, with encryption and a secure pairing step, which is a big reason locks favour it.
• Devices that work together. Strict certification means gear from different brands genuinely interoperates, and new devices still talk to old ones.
• Long range when you need it. Z-Wave Long Range, a newer addition, swaps the mesh for a direct link that can reach over a kilometre and support thousands of devices, handy for large properties.

Where Z-Wave falls short

The quiet band comes at a cost.

• Fewer devices, higher prices. Z-Wave has a smaller catalogue than Zigbee and almost none of the ultra-cheap gear you see on 2.4 GHz.
• Locked to a region. Z-Wave uses a different frequency in each country, so an overseas device will not talk to an Australian hub.
• It needs a hub. Like Zigbee, there is no Z-Wave network without a controller.
• Less common here. Z-Wave is harder to find in Australia than Zigbee, so local device choice is thinner again.

How Z-Wave compares

The short version: Z-Wave and Zigbee are close rivals, both low-power mesh. Z-Wave's quieter band means fewer dropouts and better range, but the devices cost more and there are fewer of them.

What Z-Wave is used for

Z-Wave built its reputation on security and access: smart locks, door and window sensors, and alarms, where range and reliability matter most. You will also find switches, plugs and blinds. The big names are Aeotec, Fibaro, Ring Alarm and Yale, and enthusiasts run it through Home Assistant with a Z-Wave stick. The trade-off is choice, since Z-Wave has fewer devices and higher prices than Zigbee.

Where Z-Wave is headed

Z-Wave is not standing still. The current 800 series chips improved range and battery life and brought in Z-Wave Long Range, and the standard still gets yearly updates. The open question is Matter. Z-Wave is not part of Matter and does not speak it natively, so a Z-Wave device reaches a Matter home only through a hub that translates between the two. In 2026 there is no simple plug-in bridge for that; the practical route is a multi-protocol controller like Home Assistant, which runs Z-Wave and Matter side by side.

So is Z-Wave dying? No, but it is narrowing. It has lost the mainstream race to Matter over Thread, and some big hubs have dropped their Z-Wave radios. What it keeps is a large installed base and a real home in locks, alarms and whole-home installs, where its range and security still win. Z-Wave is becoming a specialist choice rather than a default, not disappearing.