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Best Smart Home Relay

Alex Chen

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best smart home relay? We tested Shelly, DieseRC, SwitchBot and 1 more top brands.

Our Top Picks

Best Overall

Shelly 1 Gen4 | Wi-Fi, Zigbee & Matter Smart Relay Switch with Dry Contacts, 1-Channel 16A | Home Automation | Alexa, SmartThings, Google Home, Apple HomeKit Compatible | Garage Door Opener

★★★★★★4.9

Connectivity Protocol:Wi-Fi, Zigbee, Matter

Maximum Load Current:16 Amperes Maximum

Dry Contact Support:Dry Contacts Included

Input Voltage:12V to 48V Input

Physical Dimensions:Compact Standard Size

Hub Requirement:No Hub Required

Future-proof your home with this powerful 16A relay supporting Wi-Fi, Zigbee, and Matter protocols.

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Best Value

Shelly 1 Mini Gen4 | Wi-Fi, Zigbee & Matter Smart Relay Switch with Dry Contacts, 1-Channel 8A | Home Automation | Alexa, SmartThings, Google Home, Apple HomeKit Compatible | Garage Door Opener

★★★★★★4.8

Connectivity Protocol:Wi-Fi, Zigbee, Matter

Maximum Load Current:8 Amperes Maximum

Dry Contact Support:Dry Contacts Included

Input Voltage:12V to 48V Input

Physical Dimensions:Ultra Compact Dimensions

Hub Requirement:No Hub Required

Experience affordable smart control with a compact design and multi-protocol support for tight spaces.

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Best Premium

Shelly 1 Mini Gen3, WiFi & Matter Smart Relay Switch with Dry Contacts, 1-Channel 8A, Compatible with Alexa, Home Assistant, SmartThings & Google Home, DYI, Garage Door Opener, No Hub Required

★★★★★★4.6

Connectivity Protocol:WiFi and Matter

Maximum Load Current:8 Amperes Maximum

Dry Contact Support:Dry Contacts Included

Input Voltage:120-240V AC Input

Physical Dimensions:World's Smallest Relay

Hub Requirement:No Hub Required

Enhance your setup with this advanced relay that doubles as a Wi-Fi extender and Bluetooth gateway.

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Detailed Reviews

What to Look For Smart Home Relay

Connectivity Protocol

Determines how the relay communicates with your smart home system. Common options include Wi-Fi, Zigbee, or Matter, affecting hub requirements and network stability.

Maximum Load Current

Indicates the maximum electrical amperage the relay can safely switch. This is critical to ensure compatibility with appliances like heaters, lights, or motors without overheating.

Dry Contact Support

Specifies if the relay has isolated contacts that can switch separate voltage circuits. This allows versatile control of different voltage types, such as doorbells or garage doors.

Input Voltage

Defines the power supply requirement for the device, such as 110-240V AC or 12-24V DC. Correct voltage ensures safe installation in wall switches or fuse boxes.

Physical Dimensions

The size of the relay module is vital for retrofitting. Compact designs fit easily behind standard wall switches and inside tight electrical boxes without forcing rewiring.

Hub Requirement

Identifies if a central hub or bridge is needed for operation. Wi-Fi relays often work independently, while Zigbee models require a compatible gateway for remote control.

by Shelly

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.9 / 5.0

Shelly 1 Gen4 | Wi-Fi, Zigbee & Matter Smart Relay Switch with Dry Contacts, 1-Channel 16A | Home Automation | Alexa, SmartThings, Google Home, Apple HomeKit Compatible | Garage Door Opener

BEST OVERALL

The Shelly 1 Gen4 stands out as a top tier smart relay solution for modern homes. It offers exceptional versatility with Wi Fi, Zigbee, and Matter support, ensuring future proof compatibility. The 16A capacity handles heavy loads easily, making it perfect for garage doors and main lighting circuits. Its compact design fits seamlessly into standard wall boxes. Users appreciate the dry contacts and reliable performance without needing a dedicated hub. It is an excellent choice for comprehensive home automation.

Key Specifications

Connectivity Protocol

✓Wi-Fi, Zigbee, Matter

Maximum Load Current

✓16 Amperes Maximum

Dry Contact Support

✓Dry Contacts Included

Input Voltage

✓12V to 48V Input

Physical Dimensions

✓Compact Standard Size

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Supports multiple protocols
✓High 16A load capacity
✓Fits in wall boxes
✓No hub required

Reasons Not to Buy

✗Price is higher than competitors
✗Requires neutral wire usually

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by Shelly

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

Shelly 1 Mini Gen4 | Wi-Fi, Zigbee & Matter Smart Relay Switch with Dry Contacts, 1-Channel 8A | Home Automation | Alexa, SmartThings, Google Home, Apple HomeKit Compatible | Garage Door Opener

BEST VALUE

The Shelly 1 Mini Gen4 delivers impressive smart home functionality at a great price point. It supports Wi Fi, Zigbee, and Matter, offering flexible connectivity options for various setups. With an 8A capacity, it is perfect for controlling lights and small appliances. The extremely compact size allows installation in tight spaces where other relays cannot fit. It features an upgraded processor for fast response times. This device provides outstanding value for anyone starting their smart home journey.

Key Specifications

Connectivity Protocol

✓Wi-Fi, Zigbee, Matter

Maximum Load Current

✓8 Amperes Maximum

Dry Contact Support

✓Dry Contacts Included

Input Voltage

✓12V to 48V Input

Physical Dimensions

✓Ultra Compact Dimensions

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Very compact design
✓Multi protocol support
✓Upgraded fast processor
✓Great price point

Reasons Not to Buy

✗Lower load capacity
✗Limited to smaller devices

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by Shelly

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.6 / 5.0

Shelly 1 Mini Gen3, WiFi & Matter Smart Relay Switch with Dry Contacts, 1-Channel 8A, Compatible with Alexa, Home Assistant, SmartThings & Google Home, DYI, Garage Door Opener, No Hub Required

BEST PREMIUM

The Shelly 1 Mini Gen3 offers reliable smart control with a focus on advanced features. It supports WiFi and Matter, ensuring broad compatibility with major platforms. The device functions as a Bluetooth gateway and WiFi extender, adding significant value. Its tiny footprint is ideal for retrofitting lights, irrigation systems, and garage doors. The improved processor and increased memory ensure smooth operation. This model is a robust option for tech enthusiasts who want premium build and extended functionality.

Key Specifications

Connectivity Protocol

✓WiFi and Matter

Maximum Load Current

✓8 Amperes Maximum

Dry Contact Support

✓Dry Contacts Included

Input Voltage

✓120-240V AC Input

Physical Dimensions

✓World's Smallest Relay

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Acts as WiFi extender
✓Bluetooth gateway feature
✓Increased memory storage
✓Fast installation process

Reasons Not to Buy

✗Lacks Zigbee support
✗Initial setup can be tricky

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DieseRC 4 Channels WiFi Smart Switch, DC 5V 12V 24V 36V Passive Output Relay Module Ewelink APP WiFi Control Compatible with Alexa/Google Home, Inching/Self-Locking Switch

by DieseRC

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

DieseRC 4 Channels WiFi Smart Switch, DC 5V 12V 24V 36V Passive Output Relay Module Ewelink APP WiFi Control Compatible with Alexa/Google Home, Inching/Self-Locking Switch

BEST RUNNER UP

The DieseRC 4 Channels WiFi Smart Switch provides extensive control options for DIY enthusiasts. It features four independent channels, allowing users to manage multiple devices from a single unit. The eWelink app enables remote access and voice control through Alexa and Google Home. With support for various DC voltages, it is ideal for custom electronics projects. Users can configure inching or self locking modes easily. It is a versatile and capable runner up for specific low voltage applications.

Key Specifications

Connectivity Protocol

✓WiFi Connectivity Only

Maximum Load Current

✓Variable DC Voltage

Dry Contact Support

✓Passive Output Relay

Input Voltage

✓5V to 36V Input

Physical Dimensions

✓Standard Module Size

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Four separate channels
✓Configurable inching mode
✓Works with eWelink app
✓Wide voltage input range

Reasons Not to Buy

✗Requires stable WiFi signal
✗Limited to DC voltage use

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by Shelly

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

Shelly 1 Mini Gen3, WiFi & Matter Smart Relay Switch with Dry Contacts, 1-Channel 8A, Compatible with Alexa, Home Assistant, SmartThings & Google Home, DYI Garage Door Opener, No Hub Required (2 pack)

BEST PREMIUM PICK

The Shelly 1 Mini Gen3 offers an exceptional blend of performance and compact design suitable for various smart home applications. Its support for WiFi and Matter ensures future proofing, while the dry contacts provide versatile installation options for garage doors or irrigation systems. The ability to function without a hub simplifies setup significantly. Although the price point is higher than basic modules, the robust feature set, improved processor, and app integration make it a top tier choice for advanced users.

Key Specifications

Connectivity Protocol

✓WiFi and Matter

Maximum Load Current

✓8 Amps Maximum

Dry Contact Support

✓Dry Contacts Supported

Input Voltage

✓110 to 240 VAC

Physical Dimensions

✓Ultra Compact Size

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Matter compatible
✓Very compact design
✓No hub required
✓Highly versatile application

Reasons Not to Buy

✗Higher price point
✗Requires external enclosure outdoors

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SwitchBot WiFi Switch Compatible with Alexa/Apple Home/Google Home/Matter (Hub Required), Power-Measuring Relay Switch Module with Integrated Bluetooth Repeater and Dry Contact, 2.4 GHz, 16 A

by SwitchBot

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

SwitchBot WiFi Switch Compatible with Alexa/Apple Home/Google Home/Matter (Hub Required), Power-Measuring Relay Switch Module with Integrated Bluetooth Repeater and Dry Contact, 2.4 GHz, 16 A

BEST FOR BEGINNERS

This SwitchBot relay module is ideal for users seeking simple automation solutions. It installs quickly behind standard switches to make old devices smart instantly. The integrated power measuring feature provides useful energy usage data directly in the app. While Matter support is excellent, it does require a hub for full functionality. The device acts as a Bluetooth repeater, which helps strengthen the network connection for other SwitchBot products nearby.

Key Specifications

Connectivity Protocol

✓WiFi and Bluetooth

Maximum Load Current

✓16 Amps Maximum

Dry Contact Support

✓Dry Contact Supported

Input Voltage

✓100 to 240 VAC

Physical Dimensions

✓4.2 x 3.7 cm

Hub Requirement

✓Hub Required

Reasons to Buy

✓Power measuring capability
✓Matter compatible
✓Bluetooth repeater included
✓Fits standard switch boxes

Reasons Not to Buy

✗Hub required for Matter
✗Larger than some competitors

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DieseRC Tuya 1 Channel WiFi Smart Switch, DC 5V 12V 24V 36V Passive Output Relay Module, with 2X RF Remote Control, Compatible with Alexa/Google Home

by DieseRC

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

DieseRC Tuya 1 Channel WiFi Smart Switch, DC 5V 12V 24V 36V Passive Output Relay Module, with 2X RF Remote Control, Compatible with Alexa/Google Home

BEST BUDGET

The DieseRC Tuya smart switch offers incredible value for budget conscious users. It includes an RF remote control, providing flexible control options even without a smartphone. The device operates on low voltage DC power, making it safe for DIY electronics projects. Setup is straightforward using the popular Tuya app. However, the build quality feels less premium compared to higher end alternatives. It is an excellent entry point for basic smart home automation needs.

Key Specifications

Connectivity Protocol

✓WiFi and RF

Maximum Load Current

✓10 Amps Maximum

Dry Contact Support

✓Passive Output Relay

Input Voltage

✓5 to 36 VDC

Physical Dimensions

✓Compact Module Size

Hub Requirement

✓No Hub Required

Reasons to Buy

✓Includes RF remote
✓Very affordable price
✓Low voltage operation
✓Easy app integration

Reasons Not to Buy

✗DC voltage only
✗Build quality is average

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Zooz 700 Series Z-Wave Long Range Smart Relay ZEN51 | Installs Behind Wall Switch Or at The Light | Compatible with SmartThings, Hubitat, and Home Assistant | Z-Wave Hub Required (Sold Separately)

by Zooz

X Score

X Score is TechXFinder's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

Zooz 700 Series Z-Wave Long Range Smart Relay ZEN51 | Installs Behind Wall Switch Or at The Light | Compatible with SmartThings, Hubitat, and Home Assistant | Z-Wave Hub Required (Sold Separately)

BEST FOR PROFESSIONALS

The Zooz ZEN51 is a professional grade relay designed for complex Z-Wave installations. It supports 3 way wiring configurations and installs easily behind existing wall switches. The device features 700 series Z Wave technology for extended range and improved reliability. Users must possess a Z Wave hub to utilize this device effectively. It is perfect for automating lighting circuits while retaining the original switch functionality. The build quality is excellent and ensures long term reliability.

Key Specifications

Connectivity Protocol

✓Z Wave 700 Series

Maximum Load Current

✓15 Amps Maximum

Dry Contact Support

✓Dry Contact Output

Input Voltage

✓120 VAC Input

Physical Dimensions

✓1.5 x 1.4 inches

Hub Requirement

✓Z Wave Hub Required

Reasons to Buy

✓Supports 3 way wiring
✓Long range Z Wave
✓ETL certified safety
✓Pigtail wires included

Reasons Not to Buy

✗Hub sold separately
✗Requires neutral wire

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Buying Guide

Key Features to Consider

When selecting a smart home relay, prioritize the maximum load current and voltage compatibility to ensure the device can safely handle your specific appliances, such as fans or lighting circuits. Look for broad protocol support, including Zigbee, Z-Wave, or Wi-Fi, to guarantee seamless integration with your existing smart home ecosystem. Additionally, features like a dry contact mode for low-voltage triggers and a physical manual override switch are essential for maintaining control during network outages.

Budget Recommendations

In the entry-level bracket of $15 to $25, basic Wi-Fi relays offer reliable performance for simple on/off tasks but may lack energy monitoring features. Mid-range options priced between $30 and $50 typically provide more stable Zigbee or Z-Wave connectivity, superior build quality, and power consumption tracking. For complex installations, premium units costing $60 and above often feature multi-channel control and detached mode capabilities, offering greater flexibility for professional setups.

Common Pitfalls to Avoid

A frequent error is ignoring the distinction between dry and wet contacts, which can lead to short circuits or equipment damage if the relay is wired incorrectly. Buyers often underestimate the physical dimensions of the device; always verify the relay will fit behind your existing wall switch alongside the necessary wiring. Finally, failing to check for a neutral wire requirement is a major oversight, as many advanced relays will not function without a constant power supply.

How We Test Best Smart Home Relay

Our team has spent years researching and evaluating smart home relay across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with smart home relay and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Eco-conscious homeowners

They use smart relays to monitor and automate high-energy appliances, significantly reducing electricity waste and utility costs.

Accessibility users

Smart relays allow individuals with limited mobility to control hard-to-reach switches and heavy appliances via voice commands or smartphone apps.

Frequent travelers

They benefit from the ability to remotely control lighting and appliances to simulate occupancy, enhancing home security while they are away.

DIY home automation enthusiasts

These users utilize relays to affordably retrofit existing 'dumb' devices into a sophisticated, interconnected smart home ecosystem.

Frequently Asked Questions

What is a smart home relay and what is it used for?

A smart home relay is a device that allows you to control traditional, non-smart appliances and lighting systems remotely via your smartphone or voice assistant. It works by physically connecting to your existing wiring to cut or allow the flow of electricity, effectively turning standard devices into smart ones without replacing the fixtures themselves.

Should I choose a Wi-Fi, Zigbee, or Z-Wave smart relay?

It depends on your existing smart home ecosystem. Wi-Fi relays are standalone and easy to set up but can congest your router if you have many devices. Zigbee and Z-Wave relays require a separate hub but create a more stable mesh network, offer faster response times, and support more devices without clogging your Wi-Fi bandwidth.

Do I need a neutral wire to install a smart relay?

Most high-quality smart relays require a neutral wire to power the device's internal electronics continuously. However, 'no-neutral' versions are available, though they often have a minimum load requirement or may require an additional bypass capacitor to function correctly with low-wattage LED bulbs.

What is the difference between a 1-channel and a 2-channel smart relay?

A 1-channel relay can control a single circuit or load, making it suitable for a single light or group of lights controlled by one switch. A 2-channel relay can control two independent circuits within the same physical box, making it ideal for double-gang switches where you want to control two different sets of lights separately.

Can a smart relay work if the internet or Wi-Fi goes down?

Yes, one of the main advantages of a smart relay over a smart bulb is that your physical wall switches will still work even if the internet is down. While remote app control and voice commands require a connection, the relay acts as a pass-through, allowing you to manually toggle your lights on and off via the switch as you normally would.