Smart plugs are one of the easiest and least expensive ways to start a smart home. Plug one into an outlet, plug a lamp or appliance into it, and you can control that device from your phone, with your voice or on a schedule. But smart plugs differ in how they connect, what they work with and how much power they can handle.
This guide explains what to look for in a smart plug and describes popular brands based on published information. We have not tested these products ourselves. Specifications, prices and compatibility change often, so check current details before buying.
What a Smart Plug Can Do
A smart plug sits between an outlet and a device and switches power on or off. That simple function enables a lot:
- Remote control: Turn lamps, fans or holiday lights on and off from your phone.
- Schedules: Turn lights on at sunset or a coffee maker on in the morning (if the coffee maker starts brewing when powered on).
- Voice control: Use Amazon Alexa, Google Assistant or Apple’s Siri, depending on compatibility.
- Automations: Trigger the plug from sensors or other devices.
- Away mode: Some apps randomize lights to make a home look occupied.
- Energy monitoring: Some plugs report how much electricity a device uses.
What a Smart Plug Cannot Do
A smart plug only switches power. It cannot change a device’s settings, dim a non-dimmable lamp or turn on a device that needs a button press after power is restored. Many modern appliances with electronic controls do not turn on automatically when power returns.
Connection Types
Wi-Fi
Most smart plugs connect directly to your home Wi-Fi network, usually on the 2.4 GHz band. They are easy to set up with an app and do not need a hub. Large numbers of Wi-Fi devices can crowd some home networks.
Matter
Matter is an industry standard developed by the Connectivity Standards Alliance (CSA) to help smart home devices work across ecosystems such as Amazon Alexa, Google Home, Apple Home and Samsung SmartThings. Matter plugs can be added to multiple platforms. See Matter explained.
Thread
Thread is a low-power mesh network protocol often used with Matter. Thread devices need a Thread border router, which is built into some smart speakers, displays and hubs.
Zigbee and Z-Wave
These mesh protocols require a compatible hub. They are popular with enthusiasts who use platforms like Home Assistant, Hubitat or SmartThings. See smart home hubs explained.
Bluetooth
Some plugs use Bluetooth for setup or local control. Range is limited without a hub or bridge.
Key Features to Compare
Ecosystem Compatibility
Check that the plug works with the voice assistant and app you already use. See Alexa vs. Google Home.
Load Rating
Every plug has a maximum current or wattage rating. Check it against the device you plan to control. Many plugs are not intended for high-draw appliances such as space heaters, and manufacturers of space heaters often advise plugging them directly into a wall outlet. Follow both manufacturers’ instructions.
Safety Certification
Look for certification from a recognized testing laboratory, such as UL or ETL listings in the United States. These marks indicate the product has been tested to applicable safety standards.
Size and Shape
Bulky plugs can block the second outlet on a duplex receptacle. Compact designs leave the other outlet free.
Physical Button
A button on the plug lets you control it manually when your phone is not handy.
Energy Monitoring
If you want to see how much power a device uses, look for plugs that advertise energy monitoring. Accuracy varies.
Outdoor Plugs
Outdoor smart plugs have weather-resistant housings, often with multiple outlets. Use them only with outlets rated for outdoor use, such as GFCI-protected outlets with covers.
Local Control
Some plugs can operate without an internet connection, which can improve reliability and privacy. Matter and hub-based devices often support local control.
Popular Smart Plug Brands
- TP-Link Kasa and Tapo: Widely available Wi-Fi plugs, including some with energy monitoring and Matter support.
- Amazon Smart Plug: Designed to work with Alexa.
- Wyze: Budget-focused plugs, including outdoor models.
- Eve Energy: Thread and Matter plugs, popular with Apple Home users.
- Meross: Wi-Fi and Matter-capable plugs.
- Leviton and Lutron: Known for in-wall switches and dimmers, with some plug-in options.
- Aqara, Sengled and Third Reality: Offer Zigbee and Matter devices.
Check each brand’s current model list, since compatibility and features change.
Smart Plugs vs. Smart Bulbs vs. Smart Switches
| Option | Best For | Trade-Offs |
|---|---|---|
| Smart plug | Lamps, fans, small appliances | Switches power only |
| Smart bulb | Color, dimming in existing fixtures | Wall switch must stay on |
| Smart switch | Overhead lights, whole fixtures | Requires wiring; renters may need permission |
See our smart bulbs buying guide for lighting.
Practical Uses
- Lamps on schedules
- Holiday lights
- Fans
- Aquarium lights (check load rating and manufacturer guidance)
- Coffee makers with manual switches
- Rebooting a modem or router remotely, if the plug stays connected
Safety Tips
- Do not exceed the plug’s rated load.
- Avoid using smart plugs with space heaters, high-power appliances or medical equipment unless both manufacturers approve.
- Do not plug smart plugs into power strips or extension cords unless the manufacturer allows it.
- Do not automate devices that could become dangerous if turned on unattended, such as irons, curling irons or some heaters.
- Keep indoor plugs away from water.
Setup Tips
- Check your Wi-Fi band. Many plugs need 2.4 GHz.
- Install the app and follow pairing instructions.
- Name plugs clearly, such as “Living Room Lamp,” for easier voice control.
- Update firmware when updates are available.
- Group devices into rooms in your app.
See how to secure your smart home for security basics.
Privacy Considerations
Smart plugs from different companies collect different data, such as usage times and energy use. Review privacy policies, turn off features you do not need and consider brands that support local control.
Questions to Ask Before Buying
- Which voice assistant or app do you use now, and might you switch later?
- Does your router support 2.4 GHz Wi-Fi, or do you have a Thread border router?
- What is the wattage of the device you want to control?
- Do you need energy monitoring?
- Will the plug block the other outlet?
Frequently Asked Questions
Do smart plugs need a hub?
Many Wi-Fi and Matter-over-Wi-Fi plugs do not. Zigbee, Z-Wave and Thread devices need a hub or border router.
Can I use a smart plug with a space heater?
Many space heater manufacturers advise against plugging heaters into anything other than a wall outlet. Follow manufacturer instructions.
Do smart plugs use electricity when off?
They use a small amount of standby power to stay connected.
Will a smart plug work if the internet goes down?
Some work locally, especially Matter or hub-based plugs. Cloud-dependent plugs may lose remote control.
Are smart plugs safe?
Choose certified products, stay within load ratings and follow manufacturer instructions.
The Bottom Line
Smart plugs are an easy, affordable way to automate lamps and small devices. Choose a plug that works with your ecosystem, has an appropriate load rating and carries safety certification. Consider Matter for cross-platform flexibility, and avoid using smart plugs with high-power or potentially dangerous appliances.
Editorial note: Gadget Nestly is independent and reader-supported. This guide is based on research into manufacturer documentation, published specifications and widely accepted best practices; we have not been paid to mention any product. If we add affiliate links in the future, they will be clearly disclosed per our Affiliate Disclosure.