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Unplugging your internet does not necessarily turn off your smart home. Devices can keep working if their control path and required automation run locally—and if your router, local hub, and power remain available. But “works offline” is not a single yes-or-no result: app control, voice commands, automations, remote access, and a device’s basic function can behave differently.
This headline describes a hands-on test, but it does not identify the devices or report what happened. Without the test notes, there is no reliable way to name which of the more than 20 devices kept working. The useful way to report the results is device by device, function by function, and with the outage conditions made clear.
What does “unplugged the internet” mean?
An internet outage is different from a Wi-Fi failure or a power cut. If the modem loses its connection to the provider but the router and home network stay on, devices on that network may still communicate locally. If the router is unplugged or restarted, local Wi-Fi control may disappear too. If power is cut, powered devices and hubs may stop regardless of whether their protocols support local control.
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| Outage condition | What may remain available | What the test tells you |
|---|---|---|
| Internet service disconnected; router and Wi-Fi still running | Local network communication, a powered local hub, and some local app, voice, or automation functions | Whether the tested function relies on an external service or can run inside the home |
| Router or Wi-Fi disconnected | Functions using a separate local hub, direct Bluetooth, a physical control, or a device’s own fallback behavior may remain; Wi-Fi-dependent control is unavailable | Whether the device has a control path that does not depend on the home Wi-Fi network |
| Power cut | Only functions supported by devices or hubs with power available, such as battery-powered equipment or a backup supply | Whether the device has power and what it can do without powered network equipment |
Home Assistant’s guidance makes the key distinction: local protocols can support device communication without internet service, but integrations that require a brand’s cloud cannot reach the device when that service is unavailable (Home Assistant’s offline FAQ).
#1 Best Overall
- Echo Hub — An easy-to-use smart home control panel redesigned for your home. Arrange controls on your dashboard to quickly adjust devices, view cameras, start routines, and more.
- Customize your dashboard — Arrange devices into sections and resize them to focus on what matters most. Create a personalized layout that matches how your family uses their connected devices.
- Reimagined for your home - With an Alexa+ and compatible Ring subscription (sold separately), get Ring camera event summaries to stay in the know. Search your Ring footage using simple voice commands. Create routines by voice, activate modes to manage multiple devices at once, and chat with Alexa to easily control your smart home.
- Home security for the whole family — Use Echo Hub to easily arm and disarm your compatible security system, making it easy for everyone in your family to manage home security. Use the Alexa app and compatible cameras, locks, alarms, and sensors to check in while you're out.
- Works with thousands of Alexa compatible devices — WiFi, Bluetooth, Zigbee, Matter, Sidewalk, and Thread devices sync seamlessly with the built-in smart home hub.
Which smart home connections can work locally?
Protocol support is a clue, not proof that every feature works offline. The device, controller, integration, network, and specific action all matter. A light might respond to a local switch while its app, voice assistant, or remote notifications fail.
Local hubs and protocols
Home Assistant identifies Zigbee, Z-Wave, Matter, Thread, and ESPHome as local protocols that do not need internet access for device communication. That does not establish that every product using one of them works with every hub, or that all of its functions are local. If an integration depends on a vendor cloud, that integration loses access when the internet is down.
Rank #2
- MEET ECHO SHOW 15 - A stunning 15.6" Full-HD (1080p) smart display that's perfect for your kitchen and ready to show you more. Use customizable widgets to keep your day on track, watch your favorite shows with Fire TV and powerful vibrant sound, and enjoy natural video calling, with 3.3x zoom and wide field of view.
- FAMILY ORGANIZATION HUB - See your top widgets at a glance, like your family’s calendars and to-do lists, local weather, smart home, and more.
- ALL YOUR FAVORITES, ALL RIGHT HERE - Built-in Fire TV unlocks endless entertainment, so you can enjoy your favorite content from thousands of apps like Prime Video, Netflix, YouTube, Apple TV, and more (subscription may be required). Fire TV remote included. Plus, now you can quickly add a device to play music with Active Media - start playing a song in the kitchen, then add the living room and bedroom on the fly.
- SMART HOME CENTRAL - Control smart devices with your voice or a few taps using the smart home dashboard. Easily turn on all your living room lights at once or check live camera feeds to see what's happening around your home.
- YOUR FAVORITE MEMORIES ON DISPLAY - Brighten your space (and your day) by turning your home screen into a photo slideshow that displays your favorite memories. Auto curate your images and show off your favorite family memories.
Matter still needs local infrastructure
Matter is designed for local connectivity, but it uses a network and controller rather than working independently of them. The Connectivity Standards Alliance says Matter devices connect over Wi-Fi, Thread, or Ethernet, with Bluetooth Low Energy used for setup. Local control requires an in-home Matter controller. Controlling devices while away from home requires an internet connection (Connectivity Standards Alliance Matter FAQs).
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Amazon lists BLE mesh, Matter over Wi-Fi, Matter over Thread, and Zigbee as local connectivity options for Alexa-connected smart home devices. It says a local connection between an Echo and a device can allow voice interactions to continue during an internet or cloud outage. That is conditional: it does not mean every Echo, skill, or voice command works offline (Amazon Alexa developer documentation).
Rank #3
- Powered by SmartThings: Connect, monitor, and automate your home through the SmartThings app. Build a reliable, unified smart home using Samsung's proven ecosystem
- Matter + Zigbee Smart Home Hub: Supports the newest Matter standard plus Zigbee for lighting, sensors, plugs, switches, thermostats, and more - thousands of compatible devices. PLEASE NOTE: Z-Wave not supported
- Easy Setup with Wi-Fi or Ethernet: Get started in minutes using Wi-Fi or a wired Ethernet connection for apartments, houses, and expanding smart home systems - Z-Wave not supported
- Automations That Work for You: Create custom routines for security, lighting, comfort, and energy savings. Many local automations continue working even if your internet goes offline
- Wide Device Compatibility: Connect compatible smart devices from Aeotec and many other brands to build a unified system for lighting, voice control, energy management, and climate settings
“Still works” depends on the function you tested
Record each capability separately instead of giving a device one blanket offline verdict. An outage can affect the route used to send a command without stopping a device’s basic operation or previously configured behavior.
- Core operation: Does the device still perform its basic job, such as turning on from a physical switch or regulating a setting?
- App control: Can the app issue a command locally while the phone remains connected to the home network?
- Voice control: Does a local assistant-device connection support the exact command, without relying on cloud processing or a cloud service?
- Automations: Does the rule run on the device or local controller, or does it depend on a cloud service?
- Remote access: Can you control it from outside the home? Cloud-based access generally needs an internet connection; local control at home is a different case.
- Notifications and external data: Does the feature need a vendor service, internet access, or data from outside the home?
- Fallbacks: Does the device retain a schedule, last setpoint, or manual control when its normal connection is unavailable?
What manufacturer examples show
IKEA: local app control still depends on Wi-Fi
IKEA says its smart products can be controlled with a remote or app during an internet interruption if the mobile device remains connected to the same Wi-Fi network. If the router is disconnected or restarted, that local control route is unavailable. The example shows why an internet-only outage should not be described as a Wi-Fi outage (IKEA support).
Rank #4
- New size, more viewing area: The 11“ smart display features a vibrant Full-HD touchscreen with 60% more viewing area versus Echo Show 8 (2025 release), built-in smart home hub, AZ3 Pro chip for powerful performance, and Omnisense technology for highly personalized experiences.
- Content looks and sounds incredible: Watch shows on Prime Video, Netflix, and more on the vibrant Full-HD 11" screen and enjoy room-filling spatial audio, crisper vocals, wider sound stage, and up to 2x bass versus Echo Show 8 (2023 release). With Alexa+, find the name of that song you love and discover new shows based on your preferences.
- Your everyday assistant: The 11" display makes it easy to see recipes and calendars at a glance, find meal inspo, and manage your shopping lists. With Alexa+, find recipes based on foods you love, make reservations, order groceries, and more.
- Simple Smart Home control: Pair and control thousands of devices that work with Alexa without needing a separate smart home hub. Easily view your camera feeds. Manage lights, thermostats, and more using the display or your voice. With Omnisense technology, you can activate routines via temperature, presence, or visual ID detection.
- Crystal-clear video calls: Video calls feel natural on the vibrant 11" screen with a centered, auto-framing camera, 3.3x zoom, and noise reduction technology. Use live view to check in on your family, pets, and more while you're away.
Netatmo: heating control continues, but a feature is lost
Netatmo says its Thermostat and Valves continue controlling heating according to the current weekly schedule or last setpoint during an internet outage. Its anticipation/Auto-Adapt function is disabled because outdoor temperature readings are unavailable. This is specific to the products covered by Netatmo’s support article, not a rule for thermostats in general (Netatmo support).
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For every device, record the outage setup, the available local equipment, and the exact action you tried. If the router stays on during one test but is disconnected during another, treat those as separate results.
- List the device and its normal control path. Note whether it uses a vendor cloud, local Wi-Fi or LAN, a Zigbee, Thread, or Z-Wave hub, direct Bluetooth, or a physical control.
- State what remained powered. Record whether the internet connection alone was interrupted, whether the router and Wi-Fi stayed on, which hub or controller was available, and whether the device had power.
- Test specific functions separately. Try the app, voice, automation, remote access, notifications, and core operation where relevant. Record the result for each attempted function rather than inferring untested behavior.
- Check retained behavior. Note whether a schedule, last setpoint, or other fallback continued, and whether any feature stopped because it needed cloud access or external data.
- Repeat under different outage conditions. Test internet loss with the home network operating separately from router/Wi-Fi loss. Test power loss only as a distinct condition, and state what remained powered.
A concise result might read: “Internet disconnected; router and Wi-Fi stayed on; hub remained powered; app control worked locally; voice was not tested; remote access failed.” That reports an observed outcome without claiming the device works offline in every sense.
When a local controller may help
A local controller can provide the in-home connection for compatible devices, but it does not make every device, integration, or feature local. Home Assistant describes Home Assistant Green as its official plug-and-play smart home hub and mentions optional Connect ZBT-2 accessories for Zigbee, Thread, and Matter (Home Assistant FAQ). Before choosing a controller, check whether it supports the devices and protocols you use, whether the relevant integration communicates locally, and whether the particular feature you need depends on a cloud service.
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