What a Smart Home Hub Actually Does
A smart home hub is a piece of hardware or software that sits between individual smart devices and the apps used to control them, translating different communication languages into one that all devices understand.
Without a hub, each brand's app often only talks to that brand's own devices, forcing a household to juggle five different apps just to turn off five different lights from five different manufacturers.
The Original Fragmentation Problem
Smart home devices historically shipped with proprietary radios and cloud services controlled entirely by their manufacturer, so a lock from one company had no built-in way to talk to a thermostat from another.
This fragmentation meant setting up automations β like locking the door when the lights turn off β often required stitching together separate apps with a third-party service, if it worked at all.
Hubs Speak Multiple Radio Languages
Many physical hubs include several radio chips in one box β WiFi, Bluetooth, Zigbee, and Z-Wave, for instance β so the hub itself can directly receive signals from devices using any of those standards.
This multi-radio design lets one hub sit at the center of a home that has, say, Zigbee-based light bulbs, a Z-Wave door lock, and WiFi security cameras, none of which could otherwise talk to each other.
Zigbee and Z-Wave β the Older Low-Power Standards
Zigbee and Z-Wave are low-power wireless standards built specifically for smart home devices like sensors and switches, designed to sip battery power and form mesh networks among themselves.
Both predate widespread WiFi use in tiny devices and remain common in sensors and bulbs today, which is a large part of why many hubs still bother including radios for both standards.
Where Matter Fits In
Matter is a smart home connectivity standard, developed by an industry alliance that includes Amazon, Apple, Google, and Samsung SmartThings, designed so a certified device works with any Matter-compatible app or hub, no exceptions.
Rather than replacing the wireless radios devices already use, Matter defines a shared application layer that runs on top of WiFi, Thread, and Ethernet, so different brands can finally speak one common language.
Thread β the New Low-Power Mesh Radio
Thread is a low-power wireless mesh networking protocol built on the same IPv6 internet standard used across the wider internet, designed as the modern successor to Zigbee for Matter-based devices.
Because Thread devices form their own mesh network and route around a failed device, a Thread-based smart home tends to stay more reliable than one relying on a single hub receiving every signal directly.
A Thread Border Router Bridges the Gap
A Thread border router is a device β often built into a smart speaker, hub, or even a smart plug β that connects the Thread mesh network to the household's regular WiFi network and the wider internet.
Several border routers can coexist in one home, each reinforcing the same Thread mesh, which is why many newer smart speakers and hubs from different brands quietly double as Thread infrastructure.
One Certified Device, Many Ecosystems
A device certified for Matter can be set up once and then controlled from Apple Home, Google Home, Amazon Alexa, and Samsung SmartThings simultaneously, without needing separate accounts or separate pairing for each app.
This multi-admin capability means a household doesn't have to commit fully to one company's ecosystem; a Matter light bulb bought today can join whichever voice assistant the household adopts next year.
Hubs Still Handle Non-Matter Devices
Even with Matter, many existing devices predate the standard and never received a firmware update to support it. Hubs bridge these older devices into the same app and automation system as newer, Matter-certified ones.
A hub effectively acts as a translator on both ends: bridging old proprietary devices on one side and speaking the modern shared standard to voice assistants and apps on the other.
Local Control vs Cloud Control
Some hub-to-device communication happens entirely on the local network, meaning commands travel directly between hub and device without needing an internet connection or a round trip to a manufacturer's cloud server.
Matter was specifically designed to favor local control where possible, which both improves reliability during an internet outage and reduces the delay between pressing a button and a light actually turning on.
Automations Cross Brand Lines
Because a hub or Matter-compatible app can see devices from multiple brands at once, it can build automations that cross brand lines β a Philips Hue light reacting to a Samsung SmartThings motion sensor, for example.
Before shared standards, this kind of cross-brand automation usually required a third-party glue service to bridge two incompatible clouds, adding latency and another potential point of failure.
Voice Assistants Are Not Hubs by Themselves
A smart speaker running a voice assistant is not automatically a hub. It becomes one, or gains hub-like abilities, only when it also includes the radios or software needed to bridge other devices' protocols.
Many current smart speakers from Amazon, Google, and Apple now include a Thread radio and Matter controller software built in, quietly turning a music speaker into genuine smart home infrastructure.
Matter's Certification Process
A device earns the Matter logo only after passing certification testing run by the Connectivity Standards Alliance, confirming it correctly implements the shared protocol rather than just claiming compatibility.
This certification is what gives the Matter badge on a product box actual meaning: a guarantee that the specific device has been tested to interoperate, not a marketing claim made without independent verification.
Why Full Interoperability Is Still a Work in Progress
Matter adoption is broad but implementation still varies between companies. Some features, like advanced camera controls or certain sensor types, may work differently or with fewer options depending on which app controls the device.
Industry observers have noted that how Amazon, Apple, and Google each implement the specification isn't always fully consistent, so a Matter device's exact behavior can still shift slightly between ecosystems.
Legacy Bridges Keep Old Devices Relevant
Manufacturers of older, pre-Matter hardware sometimes release a small bridge device or firmware update that exposes their existing proprietary devices to Matter, extending the life of hardware already installed in a home.
This bridging approach means a household doesn't necessarily need to replace every bulb and sensor at once; the bridge translates the old protocol into the new one at a single point rather than device by device.
How a Hub Discovers New Devices
When a new device is powered on, it typically broadcasts a discovery signal on its native protocol. A hub listening on that protocol's radio detects the device and prompts the user to add it through the app.
For Matter specifically, this discovery step usually involves scanning a QR code or entering a numeric setup code, which securely commissions the device onto the local network and the chosen smart home platform.
Hubs Manage Firmware Across a Fleet
A hub often coordinates firmware updates across dozens of connected devices, since individually updating every bulb and sensor through separate apps would be impractical for most households.
This centralized update role also matters for security: outdated firmware on an old smart plug is a common weak point, and a hub that pushes updates automatically closes that gap without requiring manual attention.
Security Benefits of Standardized Interoperability
Before Matter, security practices varied wildly between manufacturers, with some devices relying on weak or outdated authentication. Matter mandates strong device-to-device encryption and identity verification as part of certification.
Standardizing this baseline security across brands means a household's overall smart home security posture no longer depends on the weakest individual manufacturer's implementation choices.
Hubs and Scene-Based Control
A scene bundles commands to multiple devices into a single action β for example, "movie night" dimming lights, closing smart blinds, and lowering a thermostat all at once, regardless of which brand made each device.
Building cross-brand scenes only became simple once a hub or shared standard could address every relevant device consistently, rather than each brand's app supporting scenes only within its own device lineup.
The Role of an Open Source Controller
Open source smart home platforms let enthusiasts run their own hub software on a small computer, supporting an especially wide range of device protocols beyond what any single commercial hub typically covers.
These platforms often add Matter and Thread support directly, letting a household combine mainstream certified devices with more niche or older hardware under one unified, self-hosted control system.
Matter Over WiFi vs Matter Over Thread
Matter devices can connect using either WiFi or Thread as their underlying radio. WiFi devices, like plugs and some cameras, connect directly to the router; Thread devices join the low-power mesh instead.
Choosing Thread for small battery-powered devices β sensors, door locks β extends battery life significantly compared to WiFi, since Thread radios are designed to use far less power for the same basic task.
What Happens When a Hub Goes Offline
If a hub's internet connection drops but local control is supported, devices communicating over Matter and Thread can often keep responding to local commands, like a wall switch or an app on the same WiFi network.
Features that depend on cloud processing β like voice recognition sent to a remote server, or notifications sent to a phone away from home β typically stop working until the internet connection is restored.
The Difference Between a Hub and an App-Only Ecosystem
Some smart home systems are entirely app-and-cloud based, with no dedicated hub hardware at all; devices connect straight to the manufacturer's WiFi network and cloud service, and the phone app is the only coordinator.
This app-only approach is simpler to set up but usually locks a household more tightly into a single brand's ecosystem, compared to a dedicated hub built to bridge multiple brands from the start.
Matter's Backward Compatibility Approach
Matter was designed so existing WiFi and Thread devices could, in many cases, gain Matter support through a firmware update rather than requiring entirely new hardware, extending the standard's reach quickly.
This is different from earlier smart home standards, which often required buying new radios or entirely new hubs, making Matter's rollout faster across an already large installed base of devices.
Why Standards Bodies Matter Here
The Connectivity Standards Alliance, the organization behind Matter, includes hundreds of member companies who collaboratively define the specification rather than one company dictating terms to the rest of the industry.
This collaborative structure is part of why competitors like Amazon, Apple, Google, and Samsung all agreed to support the same standard β none of them had to cede control of their own ecosystem to do it.
Multi-Admin Access Without Losing Control
Matter's multi-admin feature lets several ecosystems control one device without one platform taking exclusive ownership, so a household member using Alexa and another using Google Home can both control the same light.
Each ecosystem still maintains its own view of automations and permissions locally, so removing a device from one platform doesn't necessarily strip its access from another platform still commissioned to it.
Hubs in Rental and Multi-Household Settings
A physical hub simplifies managing smart devices in situations like a rental property, where a landlord may want centralized control of locks and thermostats independent of whichever apps a tenant personally prefers.
Matter's shared standard is particularly useful here, since a new tenant can add their own preferred voice assistant to existing certified devices without needing the landlord to reconfigure anything.
Energy Management Across Brands
Home energy features, like automatically dimming lights or adjusting a thermostat during peak utility pricing, work best when a system can see and act on devices across every brand in the house at once.
A hub or Matter-based controller can aggregate consumption data and control commands across brands, something no single manufacturer's app could offer while devices remained isolated in separate ecosystems.
What's Left Outside Matter's Scope
Matter currently covers common device categories like lights, locks, thermostats, sensors, and plugs, but some specialized categories β robot vacuums and certain appliances, for example β still largely rely on proprietary apps.
The standard's scope has expanded with each new version, and industry groups continue adding support for additional device types, gradually narrowing the list of things a hub still has to bridge the old way.
Choosing a Hub in a Post-Matter World
Even with Matter's growth, a dedicated hub still adds value for households with a lot of older, pre-Matter hardware, or those wanting the extra reliability of Thread border router infrastructure spread around the house.
For a household starting fresh with mostly current, Matter-certified devices, a standalone hub is less essential, since a smart speaker with a built-in Matter controller can often cover the same ground.
Redundant Border Routers Improve Reliability
Because several Thread border routers can serve the same mesh network, losing one hub or smart speaker doesn't necessarily take the whole Thread network offline, as another border router in the house can pick up the role.
This redundancy is a structural improvement over older setups where a single hub was a single point of failure for every connected device, since any hub outage used to mean the entire smart home went unresponsive at once.
The Practical Takeaway
A smart home hub's core job has always been translation: taking different device protocols and different company ecosystems and making them behave like one system from the user's point of view.
Matter has made that translation job easier by giving manufacturers a shared language to build toward, but hubs remain relevant for bridging the large amount of hardware that predates or falls outside the standard.
Sources
- Connectivity Standards Alliance: Matter standard overview and member ecosystem
- The Verge: Matter smart home standard explained β adoption and how it works
- Wikipedia: Thread (network protocol) β mesh networking and border routers
FAQ
What exactly does a smart home hub do?
It translates communication between smart devices using different radios and protocols, so devices from different brands can be controlled from one app and combined into shared automations.
What is Matter in simple terms?
Matter is a shared smart home standard backed by Amazon, Apple, Google, Samsung, and others, letting a certified device work with any Matter-compatible app or hub without needing separate setups for each.
Do I still need a hub if I only buy Matter devices?
Not necessarily. Many current smart speakers include a built-in Matter controller and Thread radio, which can cover the same role a dedicated hub used to play for a mostly Matter-based setup.
What is the difference between Zigbee, Z-Wave, and Thread?
All three are low-power mesh radio standards for smart devices. Zigbee and Z-Wave are older and proprietary in different ways; Thread is newer, built on internet IPv6 standards, and is the radio most closely tied to Matter.
Can Matter devices work without an internet connection?
Yes, for many local functions. Matter favors local control, so commands within the home network often keep working during an internet outage, though cloud-dependent features like remote access will pause.
Can two different apps control the same Matter device at once?
Yes. Matter's multi-admin feature lets several ecosystems, like Apple Home and Google Home, control the same certified device simultaneously without one taking exclusive ownership.
What is a Thread border router?
It's a device, often built into a hub or smart speaker, that connects a Thread mesh network of low-power devices to the household's WiFi network and the internet.
Does every smart device support Matter?
No. Matter currently covers common categories like lights, locks, thermostats, and sensors, but some specialized devices, such as robot vacuums, still largely rely on proprietary apps outside Matter's scope.
How does a device get the official Matter certification?
It must pass testing run by the Connectivity Standards Alliance confirming it correctly implements the shared protocol, which is what gives the Matter logo on a product actual meaning.
Why did competitors like Amazon, Apple, and Google agree to support the same standard?
Matter was developed collaboratively by a large alliance of member companies rather than dictated by one, so each company could support it without ceding control of its own ecosystem.
Can old, pre-Matter smart devices still be used with a modern setup?
Often yes, either through a hub that bridges the old protocol, or through a manufacturer-released bridge device or firmware update that adds Matter support to existing hardware.
Is Matter over Thread better than Matter over WiFi for battery devices?
Generally yes for small battery-powered devices like sensors and locks, since Thread radios use significantly less power than WiFi for the same task, extending battery life.
Does a hub improve security compared to app-only smart devices?
It can, especially by centralizing firmware updates across many devices and, for Matter-certified devices, enforcing standardized strong encryption and identity verification during setup.
What happens to automations if I remove a Matter device from one app?
Each ecosystem keeps its own local record of automations and permissions, so removing a device from one platform doesn't automatically strip its access from another platform still commissioned to it.
Is a physical hub still worth buying today?
It's most worth it for households with a lot of older, pre-Matter hardware or those wanting extra Thread border router coverage; a fresh, mostly-Matter setup can often rely on a smart speaker instead.
About the Author
We reference Wikipedia and other authoritative sources to explain the background and current understanding of this topic.
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