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What is Matter? The smart home standard explained

Matter is an open, IP-based smart home standard from the Connectivity Standards Alliance (CSA). Devices connect over Wi-Fi, Thread or Ethernet and are set up with a QR or numeric code, with Bluetooth Low Energy helping during setup. Control happens over your home network, and one device can join several platforms through multi-admin — but what actually works still depends on the platform and the device type.

What Matter is, in plain terms

The CSA describes Matter as "one protocol to connect compatible devices and systems with one another." It's built on Internet Protocol (IP), the same networking foundation the internet uses, which the CSA says makes it easier for device makers to build products that work with smart home and voice services such as Amazon's Alexa, Apple's Siri and Google's Assistant. The Alliance says it took an open-source approach, using contributions from Amazon, Apple, Google and others.

Home Assistant's documentation notes that the initial Matter 1.0 release was published in October 2022, developed under the CSA. Amazon's developer page calls Matter "an Internet Protocol (IP) wireless connectivity technology designed to enable interoperability between devices made by different manufacturers." One important point from the CSA's FAQ: when asked "Does Matter replace my currently used smart home platform?", the answer is "No." You still use Apple Home, Google Home, Alexa, SmartThings, Home Assistant or a maker's own app to control your devices — Matter is the language those devices speak, not a replacement for the apps you already use.

Matter at a glance

Here's the short version of what Matter is and isn't.

Each row in the table names its source. The platform-specific details — what each ecosystem supports and what hardware it needs — are covered in the sections below and in MatterCheck's five-platform comparison.

How Matter devices connect: Wi-Fi, Thread, Ethernet and Bluetooth

The CSA's FAQ explains that Matter uses Bluetooth Low Energy for device setup, and Wi-Fi, Thread and Ethernet for connecting devices. Bluetooth is only there to help get a device onto your network — Home Assistant's docs put it plainly: "Bluetooth is not used to control but to pair a device after unboxing or after factory resetting." Amazon's developer page adds that during setup, Alexa uses Bluetooth Low Energy to pass the Wi-Fi or Thread network credentials to your Matter device.

Thread is a separate networking technology that Matter can run on top of. The Thread Group describes Thread as a mesh networking technology built on IPv6 and IEEE 802.15.4, and says it addresses the networking layer — routing, commissioning and security — while the application layer runs on top. Home Assistant compares Thread to Zigbee, "but with the key difference that it is IP-addressable." Thread devices need a Thread border router to connect to the rest of your network; Google's help page says a border router "works as a special hub to connect all of your Thread devices together by creating a wireless Thread network." Google also says Thread is "specifically built to help smart devices carry out their commands faster, and from further away than ever before" — that's Google's claim about Thread, not a universal spec. For the practical differences, see MatterCheck's Thread vs Wi-Fi guide and the hubs and Thread border routers guide.

The pieces of a Matter home: devices, controllers and bridges

In a post published 2023-07-25, the CSA breaks a Matter home into a few parts. A Matter device is any smart home product that supports Matter — light bulbs, switches, sensors, thermostats, blinds, door locks, bridges and media devices. These devices connect to a Matter fabric, which the CSA describes as "a private virtual network over which Matter Devices, Admins, and Controllers communicate with each other." A fabric can span Wi-Fi, Thread and Ethernet networks in your home, and apps may call fabrics "services." A commissioner is a device or app used to set up a Matter device and bring it onto a fabric; it verifies the device's authenticity and assigns network credentials. A controller is what controls the device after setup.

The CSA notes that "in most cases, a Matter Controller is exclusive to the company that provides it" — so if you want to use a second platform, you need one of that platform's controllers. SmartThings' Matter article (dated 2023-01-19) uses the same terms: your phone with the SmartThings app acts as the commissioner during setup, and the Matter controller is "the hub responsible for controlling the Matter device after it is onboarded." Home Assistant runs its own Matter controller as a separate app called the Matter Server. A bridge translates another protocol — such as Zigbee or Z-Wave — so those devices can join a Matter fabric. See MatterCheck's Zigbee bridge guide for how that works.

Does Matter need the internet?

The CSA's FAQ calls Matter "a local connectivity technology." Matter-only devices need an internet-connected controller in the home — such as a smart speaker or hub — to be controlled when you're away from home. Some Matter devices may also have a direct internet connection that the maker's app uses. Home Assistant's docs say Matter products "run locally and always allow local control, with device control done without the need for any internet connection or cloud services," though some vendors may require you to set up an account before enabling Matter on certain products.

Google's help page says that before Matter, commands went through clouds, but "Matter-enabled devices work locally over your existing home wireless network without the need to connect to the cloud over the internet." The CSA's 2025-04-28 post says that "even if your connection to the internet goes down, Matter devices will maintain functionality within your local network." Amazon's developer page adds that another Matter connection lets Alexa control a cloud-connected device locally during outages. MatterCheck's local control guide covers the details.

What "Matter-compatible" means on the box

The CSA's FAQ says "only Matter-certified devices will carry the Matter logo, so look for the mark that matters." Meross, for its own products, says Matter products usually have the Matter logo printed on the packaging and a Matter setup code on the product itself. SmartThings says the Matter badge appears on the packaging of Matter devices, and each device includes a QR code with an 11 or 21-digit setup code you can enter manually if the QR can't be scanned. SmartThings also notes that the badge indicates whether a Thread device needs a Matter controller with a Thread border router.

Home Assistant's docs warn that a Thread device doesn't necessarily support Matter — some Thread-based devices use Apple HomeKit or another vendor-specific protocol instead. So a Thread logo on a box isn't the same as a Matter logo. Apple's Home accessories page carries the footnote "Requires a HomeKit- or Matter-enabled accessory," — Apple names both. MatterCheck's certification guide and Matter vs HomeKit guide go deeper.

Matter vs non-Matter smart home devices

Many existing smart home products connect to platforms and apps through the cloud. The CSA's FAQ says adding Matter to those products "will enable them to use a local connection for greater reliability and responsiveness," and makers can keep cloud connectivity alongside Matter. Whether an existing device gets Matter is another question. The CSA says many existing products "can and will be updated to support Matter via software updates," but whether a device is updated "depends on the technical capabilities of the device, and of course, whether the product maker chooses to make an update available." SmartThings puts it more bluntly: some devices built before Matter's launch may gain support via a firmware update, "but this is entirely dependent on the device."

Meross, speaking about its own products, says its existing Wi-Fi and HomeKit products "will not be able to support Matter through an upgrade" because Matter has different hardware and software requirements. Devices that use Zigbee or Z-Wave can still take part through a bridge — the CSA says Matter supports bridges that let those devices "participate in a Matter ecosystem." MatterCheck's Matter vs Zigbee / Z-Wave guide compares the approaches.

Which platforms support Matter, and what each needs

All five major platforms MatterCheck tracks support Matter, but not in the same way.

MatterCheck's checks cover 24 Matter device types across Apple Home, Google Home, Alexa, SmartThings and Home Assistant. 16 of the 24 pair over Matter on all five platforms. Home Assistant and SmartThings pair all 24; Google Home pairs 21 (1 partly, 2 not); Apple Home pairs 17 (2 partly, 5 not); Alexa pairs 16 (2 partly, 6 not). The types that don't pair everywhere include water heater, water valve / shutoff, pump, pressure sensor, speaker, appliances, electric energy meter and leak / water sensor. Google's developer page says many Matter device types are supported in Google Home, "though not all are fully supported," and types not listed there "are not officially supported." Amazon's developer page says Matter-compatible Echo devices support "a subset of Matter 1.5 and lower device types." Apple's support page 102135 lists the specific types its Home app supports. See the full MatterCheck matrix and the platform comparison.

One device, several apps: multi-admin

The CSA's FAQ says users "can choose which platforms access their Matter devices using Matter's multi-admin feature," connecting a device to multiple platforms, apps or other control points. Home Assistant's docs say the standard describes that each device should be able to support at least 5 different fabrics simultaneously — so you could add the same device to Google Home, Apple Home and Home Assistant, for example. SmartThings gives the same number: "each device can only be connected to 5 different services."

TP-Link, for its own devices, notes a practical detail: the Matter setup code on the device "can only be used to add the device to the first ecosystem." For the second platform, you generate a new setup code in the first ecosystem's app. TP-Link also says the pairing mode on its Matter-certified devices turns off automatically after 15 minutes. The CSA's 2023-07-25 post adds that you need a Matter controller for each platform you want to use. MatterCheck's multi-admin guide walks through sharing a device.

What Matter can control

The CSA's FAQ lists the device categories Matter supports: bridges, controllers, door locks, HVAC controls, lighting and electrical, media devices, safety and security sensors, and window coverings and shades. The FAQ also lists categories its members were defining at the time, including ambient sensing, appliances, dynamic lighting, cameras, electric vehicle charging, energy management, home router and access point, robot vacuums, smoke and CO, TVs, and water management.

The CSA's Matter 1.5 announcement (2025-11-20) says that release added cameras, closures, soil sensors and new energy management capabilities. Amazon's developer page says its Matter-compatible Echo devices support a subset of Matter 1.5 and lower device types. Apple's support page lists the types the Home app currently supports: air conditioners, bridges, lights, locks, outlets, switches, thermostats, blinds and shades, and sensors (motion, ambient light, contact, temperature and humidity). MatterCheck's versions guide tracks what each version added.

What Matter doesn't do

• It doesn't replace your smart home platform. The CSA's FAQ answers this directly: "No." Matter is supported by most major smart home platform providers, but you still control devices through Apple Home, Google Home, Alexa, SmartThings, Home Assistant or a maker's app.
• It doesn't make every device type work on every platform. Google's developer page says not all Matter device types are fully supported in Google Home, and types not listed aren't officially supported. MatterCheck's checks show the same pattern across platforms — some types pair everywhere, others don't.
• It may not carry every maker feature. Home Assistant's docs give Philips Hue as an example: Matter provides basic light controls, while Hue's own integration brings features like dynamic scenes and entertainment mode. Matter is a universal standard, so it may not include every feature of a product-specific protocol.
• Firmware updates can still go through the maker's app. The CSA says a Matter device can get updates using Matter's over-the-air functionality or its own update methods. Meross, for its own products, says firmware upgrades are "only feasible through the Meross app." See MatterCheck's firmware update guide.
• It doesn't upgrade older devices on its own. The CSA says whether a device gets Matter depends on its technical capabilities and whether the maker chooses to release an update. Meross says its existing Wi-Fi and HomeKit products can't be upgraded to Matter.

Getting started with Matter

1. Look for the Matter logo. The CSA says only Matter-certified devices carry the logo. Meross says its Matter products usually have the logo on the packaging and a setup code on the product.
2. Check your platform supports the device type. MatterCheck's matrix shows which of 24 device types pair on Apple Home, Google Home, Alexa, SmartThings and Home Assistant. Google's developer page says types not listed there aren't officially supported.
3. Have that platform's controller or hub. Google says you need a Matter-enabled hub before adding Matter devices to Google Home. Amazon says a compatible Echo is the Matter administrator. SmartThings says the Matter controller is the hub. Apple says with iOS 18 or later an iPhone can add and control Matter accessories without a home hub — iPhone 15 Pro or later for Thread accessories — but still recommends setting up a home hub.
4. For Thread devices, have a Thread border router. Google says that if your devices use a mix of Thread and Wi-Fi, you need a hub that also works as a Thread border router. SmartThings says the Matter badge on the packaging indicates whether a device needs a controller with a Thread border router.
5. Keep your phone and devices on the same primary network. The CSA's 2025-04-28 post says Matter devices belong on your primary Wi-Fi network so they can communicate directly with controllers and each other.
6. Scan the QR code or enter the setup code. The CSA says you can start setup from the maker's app or your smart home platform by scanning the QR code or entering the setup digits. To add a second platform, TP-Link says don't reuse the original code — generate a new one in the first ecosystem's app. See MatterCheck's adding a device guide.

Frequently asked questions

What does Matter mean on a smart home device?

It means the device uses the Matter standard. The CSA says only Matter-certified devices carry the Matter logo. Meross says its Matter products usually have the logo on the packaging and a Matter setup code on the product.

Is Matter the same as Thread?

No. Matter is a smart home application protocol; Thread is a networking technology that Matter can run on top of. The Thread Group says Thread addresses the networking layer — routing, commissioning and security — while the application layer runs on top of it. Home Assistant notes that some Thread devices use HomeKit or another vendor protocol instead of Matter, so a Thread logo doesn't mean a device supports Matter.

Does Matter need Wi-Fi?

Not necessarily. The CSA says Matter natively supports Wi-Fi, Ethernet and Thread. A Matter device can use any of those transports. Bluetooth Low Energy is used only for setup, not for ongoing control.

Do I need a hub for Matter?

It depends on the platform. Google says you need a Matter-enabled hub before adding Matter devices to Google Home. Amazon says a compatible Echo acts as the Matter administrator. SmartThings says the Matter controller is the hub. Apple says an iPhone running iOS 18 or later can add and control Matter accessories without a home hub — iPhone 15 Pro or later for Thread accessories — but still recommends setting up a home hub. Meross says major platforms require a home hub for its Matter devices.

Does Matter work without the internet?

Matter devices communicate locally over your home network. The CSA says Matter is a local connectivity technology, and its 2025-04-28 post says devices keep working on the local network even if the internet goes down. Home Assistant says Matter products "always allow local control." For control away from home, Matter-only devices need an internet-connected controller in the home.

Can my older smart devices be upgraded to Matter?

It depends on the device and the maker. The CSA says many existing products can be updated via software, but whether a device gets Matter depends on its technical capabilities and whether the maker releases an update. Meross says its existing Wi-Fi and HomeKit products can't be upgraded. SmartThings says it's entirely dependent on the device.

Is Matter the same as HomeKit?

No. HomeKit is Apple's smart home framework; Matter is a cross-platform standard from the CSA. Apple's Home accessories page says accessories require "a HomeKit- or Matter-enabled accessory," showing the two are separate but both supported in Apple Home. The CSA says Matter doesn't replace your current smart home platform.

More MatterCheck guides

• Matter platform comparison — how Apple Home, Google Home, Alexa, SmartThings and Home Assistant differ.
• Hubs and Thread border routers — what hardware each platform needs.
• Thread vs Wi-Fi — which transport a device uses and why it matters.
• Local control without internet — what keeps working when the connection drops.
• Multi-admin and sharing devices — using one device with several platforms.
• How to add a Matter device — setup codes, pairing mode and first steps.
• Checking Matter certification — how to verify a device is really certified.
• Matter versions — what each release added and what platforms support.
• Matter vs Zigbee / Z-Wave — how the standards compare.
• Matter vs HomeKit — Apple's framework and the cross-platform standard.
• Thread credentials: share, sync and combine Thread networks — how phones keep Thread credentials and how to share, sync or combine Thread networks.
• Matter on TVs: TV hubs and Matter Casting — which TVs and streamers are Matter hubs and what Matter Casting is.
• Matter speakers: what works with Matter — what the Speaker type controls and which platforms support it.
• Matter on Hubitat, Homey and openHAB — which Hubitat, Homey and openHAB models support Matter, Thread and bridging.

How we checked

Pages fetched 2026-10-20: the CSA's Matter page, Matter FAQ, its 2023-07-25 post on the parts of a Matter home, its 2025-04-28 post on primary Wi-Fi networks and its 2025-11-20 Matter 1.5 announcement; the Thread Group's FAQ; Apple's support page 102135 (published 2026-05-07) and Home accessories page; Google's Matter help page 12391458 and its developer list of supported device types; Amazon's Alexa developer page on Matter; SmartThings' Matter article (dated 2023-01-19); Home Assistant's Matter docs (2026.10.2); Meross FAQs 544 and 558; and TP-Link FAQ 3564 (last updated 2026-08-28). Pairing counts come from MatterCheck's own checks. Maker pages apply to that maker's products, and support pages change. See our methodology.

Last reviewed 2026-10-20. If your device's box or app says something different, follow the maker's own instructions.