door alarm
Skip itA small market ($79K/yr) — this niche doesn't clear our bar today.
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Review moat
Good649.9avg incumbent reviews — the moat a new listing must climb
Returns
Good2.7%return rate — above 5% kills the launch gate
Conversion
Good5.0%search→purchase rate — share of searches ending in a sale
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Avg price
Okay£10.65avg listing price — sweet spot $15–$100
Price range
Okay£3.93–£20.05cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Bad-7.1%90-day search growth — must beat 0% to launch
Market size
Bad£79K£79K/yr · 150K searches
According to Flapen's Amazon United Kingdom niche tracking, door alarm is a £79K/yr Amazon United Kingdom market (150K searches/yr). The top 5 brands hold 82% of demand. Verdict: Skip it — 42/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
door alarm market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £64K–£85K
- units × avg price
- Conversion rate
- 5.0%
- Avg BSR
- #28
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 7.4%
- Avg brand age
- 47 months
- Avg seller age
- 185 days
Competition & brand share
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.Brands
15 falling
Sellers
36
Top-5 brand share
82%
Top 20: 100%
Top-5 click share
62%
Top 20: 99%
Open market
15%
- TECKNET28%
- VOXON22%
- Noopel13%
- SanJie11%
- Defender7%
- TechRise4%
- Open — no brand owns it (9 brands, 15%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -7.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top door alarm search terms
- door alarm58K/yr
- door alarms when opened44K/yr
- door sensor alarm19K/yr
- door alarms12K/yr
- door alarm sensor13K/yr
- door handle alarm5K/yr
Top door alarm products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
VOXON Wireless Door and Window Alarm Sensor 2 Pack 2 Modes Magnetic Window Door Burglar Alarm with 100dB Loud for Kids Safety Home Shop Security
VOXON£7.874.4★1,820 rev
Door Alarm Sensor 120dB Window Alarms for Home Security Ultra-Slim Wireless Magnetic Sensor Burglar Alarm with Batteries included for House Flat Shop Office & Garage 2 Pack
Noopel£8.404.4★2,009 rev
TECKNET Door Alarm Sensor Window Alarms Sensors 2-in-1 Alarm & Chime 3-level Volume Control Door Sensor for Home Security Wireless Burglar Alarms for House Shop Office Garage (3 PCS)
TECKNET£10.734.6★2,144 rev
SANJIE Wireless Door Open Alarm Sensor Chime 600FT Operating Range 55 Ringtones 5 Volume Level with LED Indicator Door Alarm for Home Store Office Security When Opens 1 UK Plug-in Receiver 1 Sensor
SanJie£14.144.3★193 rev
TECKNET Door Alarms When Opened Alarm & Chime Winsow Sensor Home Security With 3-Level Volume Selection Red-Flashing-Ligh Garage Alarms Door Sensor Alarm for Window Garage Pool and Anti-Theft
TECKNET£10.284.6★356 rev
Newest
by launch date
ChunHee Door Alarms when Opened Door Chime for Business/Home/Shop
ChunHee£20.0543 rev
SANJIE Door Alarms When Opened with Instant & Delayed Alerts 30s/1min/2min/4min Door Left Alarm Sensor Chime 2-in-1 Alarms/Chimes for Home Security Fridge Alarm with 0-120dB Ajar Warning
SanJie£12.8218 rev
Door Window Alarm Sensor Wireless Vibration Alarm Bell for Home Security 95 dB Loud Siren Magnetic Burglar Warning Detector for School Office Shop Shed Hotel Home (2Pack White No Battery)
Unicavu£3.937 rev
TECKNET Door Sensor Alarm with Remote Control Door Alarms When Opened 4 Modes & 5-Level Volume Window Alarms for Home Security with Sirens Burglar Alarm for Home Shop Office Garage (2 PCS)
TECKNET£12.19962 rev
TECKNET Door Alarms When Opened Alarm & Chime Winsow Sensor Home Security With 3-Level Volume Selection Red-Flashing-Ligh Garage Alarms Door Sensor Alarm for Window Garage Pool and Anti-Theft
TECKNET£10.28356 rev
Trending
90-day click momentumChunHee Door Alarms when Opened Door Chime for Business/Home/Shop
ChunHee£20.054.3★
TECKNET Door Sensor Alarm with Remote Control Door Alarms When Opened 4 Modes & 5-Level Volume Window Alarms for Home Security with Sirens Burglar Alarm for Home Shop Office Garage (2 PCS)
TECKNET£12.194.5★
Door Window Alarm Sensor Wireless Vibration Alarm Bell for Home Security 95 dB Loud Siren Magnetic Burglar Warning Detector for School Office Shop Shed Hotel Home (2Pack White No Battery)
Unicavu£3.934.5★
SANJIE Door Alarms When Opened with Instant & Delayed Alerts 30s/1min/2min/4min Door Left Alarm Sensor Chime 2-in-1 Alarms/Chimes for Home Security Fridge Alarm with 0-120dB Ajar Warning
SanJie£12.824.4★
TECKNET Door Alarms When Opened Alarm & Chime Winsow Sensor Home Security With 3-Level Volume Selection Red-Flashing-Ligh Garage Alarms Door Sensor Alarm for Window Garage Pool and Anti-Theft
TECKNET£10.284.6★
What buyers say about door alarm
What buyers praise and complain about, mined from review topics.What buyers love
“Good value for money”
“Excellent product”
“Works as advertised”
“Good, different sounds and really high pitched for the alarm sound”
“Easy to use”
“Easy to install”
“No false alarms either”
“Very easy to fit and works well”
“Great addition to my security system”
“It works well”
What buyers complain about
“Really loud”
“Doesnt work”
“broke easily”
“Cheap not very good”
“didn't fit my door frames”
“Cant comment on how long it will last or how long the battery lasts yet”
“It could not be easier to install”
“Product requires a hub”
“Could be improved”
“wanted to try this on my side gate. its not waterproof”
Top return reasons
Common questions
- Is door alarm profitable to sell on Amazon United Kingdom?
- The niche generates £79K/yr across 21 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -7.1%. Flapen's verdict: Skip it (42/100).
- How competitive is the door alarm niche?
- 15 brands and 36 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 82% of demand.
- What do buyers complain about in door alarm?
- Top complaints mined from reviews: Noise Level, Functionality-Overall, Durability. The return rate is 2.7%.
- When does demand for door alarm peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the door alarm niche?
- Listings span £3.93–£20.05; the average listing price is £10.65 (sweet spot $15–$100). The average incumbent carries 650 reviews — the moat a new listing must climb.