The Best Wi-Fi Door and Window Sensors

No-hub contact sensors that connect straight to your router.

We pulled the Wi-Fi door and window sensors selling on Amazon and scored them on rating, review volume, and features. Wi-Fi sensors need no hub, but they use more battery, and almost all of them run on the cloud-based Smart Life (Tuya) app.

Prices, ratings, and review counts captured from Amazon on 2026-10-04.

Our picks

Best Overall

WiFi Door Sensor Window Detector: Smart Window Contact Sensor, Wireless Magnetic Door Open Detector with Free Notification Alerts, Compatible with Alexa Google Assistant (1-Pack)

Xinji

Xinji Wi-Fi door sensor

4.0 (295)

The best-rated Smart Life sensor with a real review count, and it answers "is the door closed?" through Alexa or Google.

PGST Wireless door and window sensor

4.8 (17)

$8.99 with the battery included.

Gaoducash Wi-Fi door sensor (4-pack)

3.9 (292)

Four sensors for about $9 each, with low-battery alerts.

PGST Wi-Fi door alarm with siren

3.5 (11)

Sounds a 100 dB siren and flashes a light when an armed door opens.

$25.99

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Side-by-side

Swipe the table sideways to see every column.

#	Sensor	Price	Rating	Reviews	Works with	Pack	App	Alexa / Google	Siren	Score
1	Xinji Wi-Fi + Bluetooth door sensor	$12.99	3.9	299		1 sensor	Smart Life	Yes	No	81
2	Xinji Wi-Fi door sensor	$12.99	4.0	295		1 sensor	Smart Life	Yes	No	76
3	Gaoducash Wi-Fi door sensor (4-pack)	$35.98	3.9	292		4 sensors	Tuya Smart or Smart Life	Yes	No	75
4	Gaoducash Wi-Fi door sensor	$12.99	3.9	260		1 sensor	Tuya Smart or Smart Life	Yes	No	74
5	Gaoducash Wi-Fi door sensor (2-pack)	$23.99	4.0	65		2 sensors	Tuya Smart or Smart Life	Yes	No	69
6	XFOX Wi-Fi door and window sensor	$28.99	3.7	13		1 sensor	Tuya	Yes	No	59
7	SONOFF DW2 Wi-Fi	$12.90	3.6	152	eWeLink app only	1 sensor	eWeLink	No	No	57
8	PGST Wireless door and window sensor	$8.99	4.8	17		1 sensor	Smart Life	No	No	57
9	PGST Wi-Fi door alarm with siren	$25.99	3.5	11		1 sensor	Smart Life	No	Yes	50

Works with: hover or tap an icon for the system name. A system is shown when it supports the product directly or through the hub the listing requires. Smart Life (Tuya) sensors work with Home Assistant through its official Tuya integration.

The full ranking

Scored out of 100: 45% customer rating, 30% review volume, 25% features.

Xinji

WiFi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor with App Notification Alert, Contact Sensor for Home Security, Compatible with Alexa Google Assistant (1pack)

3.9 299 reviews

Score 81/100

$12.99

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The same idea with Bluetooth added for easier pairing, and a history log of every open and close.

App: Smart Life
Alexa / Google: Yes
Built-in siren: No
In the box: 1 sensor
Extras: Bluetooth setup mode, history log
Battery: Not listed

Pros

Wi-Fi and Bluetooth dual mode
History log in the app
Alexa and Google voice queries

Cons

3.9 stars
Cloud-based Smart Life app
Battery life isn't listed

Best Overall

Xinji

WiFi Door Sensor Window Detector: Smart Window Contact Sensor, Wireless Magnetic Door Open Detector with Free Notification Alerts, Compatible with Alexa Google Assistant (1-Pack)

4.0 295 reviews

Score 76/100

$12.99

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A no-hub Smart Life sensor with the best rating among the Wi-Fi sensors that have meaningful review counts.

App: Smart Life
Alexa / Google: Yes
Built-in siren: No
In the box: 1 sensor
Extras: Voice status queries
Battery: Not listed

Pros

4.0 stars from 295 reviews
Ask Alexa or Google whether a door is open
Triggers Smart Life routines

Cons

Cloud-based Smart Life app
Wi-Fi drains batteries faster than Zigbee
Sold by a third-party seller

Best Multipack

Gaoducash

WiFi Door Window Sensor: Smart Contact Sensor with App Alerts, Door Open Detector Compatible with Alexa Google Assistant, Entry Detector Sensor for Home Security and Home Automation (4-Pack)

3.9 292 reviews

Score 75/100

$35.98

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Four Tuya sensors for about $9 each, for covering several doors at once.

App: Tuya Smart or Smart Life
Alexa / Google: Yes
Built-in siren: No
In the box: 4 sensors
Extras: Low-battery alerts
Battery: Not listed

Pros

About $9 per sensor
Low-battery alerts in the app
Alexa and Google voice queries

Cons

3.9 stars
Cloud-based app
The pack size is only stated deep in the listing

Gaoducash

Smart WiFi Door Sensor: Wireless Window Sensor with App Notification Alert, Tuya Door Open Contact Sensor for Home Security, No Hub Required, Compatible with Alexa Google Assistant

3.9 260 reviews

Score 74/100

$12.99

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100+ bought in past month

A basic Tuya door sensor with free alerts and Alexa or Google voice queries.

App: Tuya Smart or Smart Life
Alexa / Google: Yes
Built-in siren: No
In the box: 1 sensor
Extras: No subscription fees
Battery: Not listed

Pros

No hub, no fees
Links to other Tuya devices for automations
100+ bought in the past month

Cons

3.9 stars
Cloud-based app
Battery life isn't listed

Gaoducash

2 Pack WiFi Door Window Sensor Detector: Wireless Security Alarm Door Sensor, Tuya Door Open Contact Sensor, Compatible with Alexa,Google Home,Siri, Smart Door Sensors for Home Business Security

4.0 65 reviews

Score 69/100

$23.99

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Two Tuya sensors with adhesive mounts, rated slightly higher than the single.

App: Tuya Smart or Smart Life
Alexa / Google: Yes
Built-in siren: No
In the box: 2 sensors
Extras: 3M adhesive
Battery: Not listed

Pros

4.0 stars
Tool-free adhesive mounting
Alexa and Google voice queries

Cons

Costs more per sensor than the 4-pack
Only 65 reviews
Cloud-based app

XFOX

WiFi Door and Window Sensor, Smart Home Security Alert System, 2.4G Wireless, Compatible with Alexa, Google Home, Tuya Smart Devices

3.7 13 reviews

Score 59/100

$28.99

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A Tuya-based sensor with Alexa and Google support. Pricier than similar ones.

App: Tuya
Alexa / Google: Yes
Built-in siren: No
In the box: 1 sensor
Extras: Integrates with Tuya devices
Battery: Not listed

Pros

Alexa and Google
No hub
Works with Tuya automations

Cons

$28.99, about double similar sensors
3.7 stars from 13 reviews
Cloud-based app

SONOFF

SONOFF DW2 Wi-Fi Wireless Door Window Sensor, APP Alert for Home Security & Automation, No Gateway Required, Compatible with IFTTT, for Sliding Door/Window/Hinged Door

3.6 152 reviews

Score 57/100

$12.90

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50+ bought in past month

SONOFF's no-gateway Wi-Fi sensor, which can grab a camera snapshot when a door opens.

App: eWeLink
Alexa / Google: No
Built-in siren: No
In the box: 1 sensor
Extras: IFTTT, camera snapshot integration
Battery: Not listed

Pros

No gateway needed
Can pair with a SONOFF camera or spare phone for snapshots
IFTTT support

Cons

3.6 stars
Listing names IFTTT but no voice assistants
2.4 GHz Wi-Fi only

Best Budget

PGST

PGST Wireless Door and Window Sensor, WiFi Security System with Smart Life App Control, Battery Powered, Self-Adhesive Installation, PGST Alarm Host Required

4.8 17 reviews

Score 57/100

$8.99

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The cheapest Wi-Fi door sensor here, with the battery in the box.

App: Smart Life
Alexa / Google: No
Built-in siren: No
In the box: 1 sensor
Extras: Battery included
Battery: Included

Pros

$8.99
Battery included
Self-adhesive mounting

Cons

Only 17 reviews
Listing doesn't mention Alexa or Google
Cloud-based app

Built-in Alarm

PGST

WiFi Door Window Alarm, Smart Contact Sensor with APP Alerts & Sound Light Alarm, DIY Home Security System for House, Apartment, Office (Battery Not Included)

3.5 11 reviews

Score 50/100

$25.99

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A door sensor with its own 100 dB siren and light, for a simple standalone alarm.

App: Smart Life
Alexa / Google: No
Built-in siren: Yes
In the box: 1 sensor
Extras: 100 dB siren and flashing light
Battery: Not included

Pros

Built-in 100 dB siren and flashing light
Arm and disarm from the app
Adhesive or screw mounting

Cons

3.5 stars from 11 reviews
Battery not included
Listing doesn't mention Alexa or Google

Buyer's guide

How do door and window sensors work?

A magnet goes on the door or window and the sensor goes on the frame. When the two separate, the sensor reports open. Mount them within the gap the listing specifies, usually under an inch.

How long do the batteries last?

Most battery sensors on these lists are rated for one to three years, depending on how often they report. Low-power radios like Zigbee, Z-Wave, and Thread last much longer than Wi-Fi.

Can I use these as a security system?

They can trigger alerts and sirens through your smart home system, but they aren't a monitored alarm. For insurance discounts or police dispatch you need a professionally monitored system.

More Wi-Fi reviews

Wi-Fi light switches →Wi-Fi dimmers →Wi-Fi smart plugs →Wi-Fi bulbs →Wi-Fi motion sensors →Wi-Fi leak sensors →Wi-Fi smart locks →Wi-Fi thermostats →Wi-Fi indoor cameras →Wi-Fi outdoor cameras →Wi-Fi video doorbells →

Door and window sensors on other protocols

Z-Wave door and window sensors →Zigbee door and window sensors →Matter door and window sensors →