Key points
- Matter defines what a device is and how it is controlled: device types, commands, setup and security between devices from different brands. It runs over any IP network.
- Thread defines how small devices form a low-power IPv6 mesh and move packets. It does not define what a light switch or lock means.
- Matter devices connect over Wi-Fi, Thread or Ethernet, and Matter devices on Thread need a Thread border router to reach the rest of the home network.
- Thread is common under Matter for battery devices such as sensors and locks. Wi-Fi suits devices that move more data, such as cameras.
Matter application layer vs Thread network
Matter defines the application. The open-source Matter SDK describes Matter as an application-layer connectivity standard built on Internet Protocol, and lists its layers: a data model of device types and clusters, an interaction model for reading, writing and invoking commands, security that encrypts and signs messages, and message framing. Under those layers it needs IP, and nothing more specific.
Thread defines the network. OpenThread describes it as an IPv6-based networking protocol for low-power devices on an IEEE 802.15.4 mesh. It carries IP packets between devices, relays them across the mesh and heals around failed links. It says nothing about what the packets mean, which the Thread Group describes as leaving room for several application layers on one network.
| Matter | Thread | |
|---|---|---|
| What it is | Application standard for smart home devices | Low-power IPv6 mesh network |
| Governed by | Connectivity Standards Alliance | Thread Group |
| What it standardises | Device types, commands, commissioning, multi-admin, device certification | Network formation, routing, joining, link security |
| What it runs on | Wi-Fi, Thread or Ethernet, with Bluetooth LE for setup | IEEE 802.15.4 radios |
| Needs an extra box | A controller or hub, depending on the ecosystem | A border router to reach other networks |
| Open-source implementation | Matter SDK (connectedhomeip), Apache 2.0 | OpenThread, BSD-3-Clause |
| Carries other application layers | Not applicable | Yes, for example OCF, KNX and DALI |
Matter without Thread
Matter runs without Thread. The Connectivity Standards Alliance (CSA) lists Wi-Fi, Thread and Ethernet as Matter’s transports for connecting devices, and its certification guide describes the transport as the manufacturer’s choice. A Matter plug on Wi-Fi or a Matter bridge on Ethernet involves no Thread at all.
Matter also uses Bluetooth LE, but only to set devices up. Since Matter 1.4.2 (August 2025), devices can be commissioned over Wi-Fi alone without a Bluetooth LE radio, and Matter 1.6 (June 2026) added commissioning over NFC.
Thread without Matter
Thread runs without Matter. The Thread Group describes Thread networks carrying application layers such as OCF, Matter, KNX and DALI. Thread 1.3, released in July 2022, added the IP routing and service discovery that the Thread Group says let Matter run on Thread networks.
Thread border routers for Matter devices
Matter over Thread devices need a border router because a Thread network cannot reach any other network on its own. OpenThread states that a Thread network requires a border router to connect to other networks. The border router routes IP traffic in both directions between Thread and Wi-Fi or Ethernet, and Google’s Matter primer explains that it also publishes discovery records on behalf of Thread devices, so controllers on Wi-Fi can find them.
The phone in your hand does not need a Thread radio for this. The Thread Group says Thread does not need to be in your phone to connect to Thread products, because both are on the same IP network once the border router links them.
Border routers are often built into other devices. Apple says Thread-enabled Matter accessories need a Thread-enabled home hub, such as a HomePod mini or a recent Apple TV. Matter 1.4 (November 2024) defined home routers and access points that combine a Wi-Fi access point and a Thread border router, with secure storage and sharing of Thread network credentials.
Matter over Thread, Wi-Fi or Ethernet
Match the network to the device’s power and data:
- Battery devices that send little data, such as door sensors, locks and buttons, suit Thread. OpenThread says low-power Thread devices can sleep and run on battery power for years.
- Mains-powered devices that move more data, such as cameras, suit Wi-Fi. The Thread Group itself suggests Wi-Fi for high-bandwidth devices such as security cameras.
- Fixed equipment with a cable run, such as bridges and hubs, suits Ethernet.
OpenThread’s primer also sets Thread’s scale: one network supports up to 32 routers and 511 end devices per router.
For a device-by-device comparison, including border routers, network settings and battery life, see Matter over Wi-Fi vs Matter over Thread.
Matter 1.4 and Thread 1.4 version numbers
Matter 1.4 and Thread 1.4 share a version number by coincidence. When it released Matter 1.4 in November 2024, the CSA stated that the version numbers of Matter 1.4 and Thread 1.4 are coincidental and unrelated. Thread 1.4 is the Thread Group’s own release, which adds credential sharing, Thread over infrastructure and network diagnostics, aimed at homes with border routers from several makers.
Offline Protocol, Matter and Thread
Neither Matter nor Thread is designed for phones and apps that need to coordinate with each other directly. Thread needs 802.15.4 radios and a border router, and Matter assumes controllers and devices on one IP network.
Offline Protocol is an SDK for that other job. Apps on phones, computers and gateways discover each other over Bluetooth LE, the local network or a relay, verify each other’s identity, and exchange encrypted messages, shared documents and service calls, including when no network links them. It does not run over Thread and is not a Matter implementation.