Matter vs. Thread: what is the difference and what do you need?

Anyone delving into Home Assistant and local home automation will regularly come across the terms Matter and Thread these days.

On the packaging of smart sensors, power outlets, and other smart home devices, for example, you will see:

Matter over Wi-Fi or Matter over Thread

But what does that actually mean? Is Matter an alternative to Thread? And do you always need a Thread Border Router for a Matter device?

The short answer is: Matter and Thread serve two different functions and are actually designed to work together.

What is Matter?

Matter is an IP-based connectivity protocol for smart home devices. An important goal is interoperability: making it easier for compatible devices from different manufacturers to work together.

In other words, Matter determines how smart devices communicate and understand one another.

Matter can utilize existing network technologies to achieve this. The Connectivity Standards Alliance mentions Wi-Fi, Thread, and Ethernet, among others, for connecting Matter devices. Bluetooth Low Energy is used for tasks such as adding devices.

That is why you might encounter products with:

Matter over Wi-Fi
Matter over Thread
Matter over Ethernet

Therefore, Matter is not the wireless connection itself.

What is Thread?

Thread operates at a lower layer.

Thread is an IP-based, energy-efficient wireless mesh network protocol specifically developed for IoT and smart home devices. Thread in Homes

Thread devices can form a mesh network together. Mains-powered devices can forward traffic from other devices, while battery-powered end devices can communicate with the network in an energy-efficient manner.

 

Matter vs Thread in simple terms

You can remember the difference like this:

Matter = the language

Thread = one of the transport routes over which that language can travel

For example, a Matter device can communicate via Thread, but Matter can also work over Wi-Fi or Ethernet.

Therefore, the question:

"Matter or Thread?"

is actually not entirely correct.

A better question is:

"Does this Matter device work over Wi-Fi or over Thread?"

What does Matter over Wi-Fi mean?

With Matter over Wi-Fi, the device uses your existing Wi-Fi network for the network connection.

You do not need a Thread network for this. Matter supports Wi-Fi as an underlying network technology.

This might be logical, for example, for devices that are permanently powered.

What does Matter over Thread mean?

With Matter over Thread, Matter uses the Thread network to communicate with other devices and controllers.

Thread is designed for energy-efficient devices and forms a self-healing mesh network in which suitable devices can forward traffic for each other. Thread in Homes

Here we arrive at an important component:

The Thread Border Router

A Thread Border Router connects the Thread network to other IP networks, such as your existing Wi-Fi or Ethernet network.

A Border Router is not the same as a traditional proprietary smart home hub. This function can be integrated into various permanently powered devices.

Do you need Thread for Matter?

No.

This is probably the most important point of this article.

Matter can work via different network technologies, including:

 Wi-Fi
 Thread
 Ethernet

If you buy a Matter-over-Wi-Fi device, you do not need a Thread network.

If you buy a Matter-over-Thread device, Thread naturally plays a role in the network connection.

Therefore, when purchasing, check not only if the Matter logo is present but also which network technology the device uses.

Why are Matter and Thread interesting for local home automation?

Matter places a strong emphasis on interoperability between devices and platforms and supports local connectivity.

Thread adds an energy-efficient, IP-based mesh network specifically designed for IoT applications.

That fits well within a smart home where you want to be less dependent on separate, manufacturer-locked ecosystems.

Matter, Thread, Zigbee, or Z-Wave?

That is where it naturally gets more interesting.

You do not necessarily have to build your entire home around one technology.

Within a local smart home platform, you might encounter different technologies for different applications:

Wi-Fi for permanently powered devices
Zigbee for sensors and other energy-efficient devices
Z-Wave for other wireless smart home applications
Thread as an energy-efficient IP-based mesh network
Matter as a protocol that allows compatible devices to work together over supported IP networks

Therefore, the most important thing is not collecting as many logos as possible on the packaging.

The most important thing is that the chosen devices fit well within the architecture of your smart home.

Conclusion: Matter or Thread?

You do not actually have to choose.

Matter and Thread complement each other.

Matter ensures that compatible smart home devices can work together. Thread can provide the energy-efficient wireless IP network over which Matter communicates. Matter can also work over Wi-Fi and Ethernet. 

So, do you see Matter over Thread on a product?

Then it simply means:

Matter determines how the device communicates, and Thread provides the wireless network connection.

For those who want to build a reliable smart home that is controllable locally as much as possible, these are two technologies that can coexist perfectly.

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