---
title: "Defender Security Door Lock — $44K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/defender-security-door-lock"
last_updated: "2026-08-08T22:49:42.000Z"
locale: en
meta:
description: "Niche score 40/100 · $44K/yr market · 83K searches/yr · $18.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 40/100 · $44K/yr market · 83K searches/yr · $18.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Defender Security Door Lock — $44K/yr Amazon US Niche (2026) - Flapen"
---
# **defender security door lock**
**Skip it**
A small market ($44K/yr) — this niche doesn't clear our bar today.
Market size 11Growth 31Conversion 37Competition 60Returns 25Price range 84Avg price 83Brand share 51Review moat 24Quality gap 35
**Price range**
**Great****$9.46–$49.20**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$18.09**
avg listing price — sweet spot $15–$100
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****74%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Okay****2.9%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+4.6%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****5.1%**
return rate — above 5% kills the launch gate
**Review moat**
**Bad****5,555.19**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$44K**
$44K/yr · 83K searches
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, defender security door lock is a $44K/yr Amazon United States market (83K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Jan–May. Verdict: Skip it — 40/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **defender security door lock market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$36K–$45K**
- units × avg price
- **Conversion rate**
- **2.9%**
- **Avg BSR**
- **#149**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **78%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▼falling
**Sellers**
**57**
**Top-5 brand share**
**74%**
Top 20: 100%
**Top-5 click share**
**49%**
Top 20: 91%
**Open market**
**22%**
- AceMining34% - EverPlus17% - Cardinal Gates11% - PRIME-LINE8% - Rerishom4% - Trustella4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +4.6% search growth over the last 90 days.
3K2KSpike '24Prime Day '25Spike '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, May · busiest ÷ quietest = 2.5×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/defender-security-door-lock/trend)
## **Top defender security door lock search terms**
- **door guardian**10K/yr+61.4%3.6% conv. - **renter friendly extra door lock**9K/yr+47.3%0.8% conv. - **renter friendly security**8K/yr+39.4%0.4% conv. - **door guardian lock**6K/yr+10.5%2.3% conv. - **privacy door latch**5K/yr+1.6%2.6% conv. - **defender security door lock**7K/yr-62.2%1.2% conv. - **security door guard**6K/yr-19.9%1.5% conv. - **door security guard**4K/yr+1.2%2.3% conv. - **emergency door lock**5K/yr-14.5%1.1% conv. - **door bull**14K/yr-21.2%3.0% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/defender-security-door-lock/search-terms)
## **Top defender security door lock 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.
0%10%$4K20%$9K30%$13K40%$18K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Door Reinforcement Lock Withstands 800lbs of Force - White Extra Proof Door Lock for Kids Safety Drilling Required Prevents Unauthorized Entry Add a Door Security Lock for Home Safety & Privacy**AceMining**$11.30**4.8★5,352 rev](https://www.amazon.com/dp/B0B7JQ86LR) [2**Home Security Door Lock 2 Pack Childproof Door Reinforcement Lock with 3 Inch Stop Withstand 800 lbs for Top Front Inward Swinging Door Upgrade Flip High Night Lock to Defend Your Home Kids**EverPlus**$17.00**4.7★7,433 rev](https://www.amazon.com/dp/B07HC3M9HH) [3**Cardinal Gates Door Guardian Home Security Door Reinforcement Lock for Inward Swinging Doors - Child Proof Lock Front Door - Extra Lock for Home from Inside - USA Based - White**Cardinal Gates**$20.72**4.8★3,093 rev](https://www.amazon.com/dp/B004RL1IMC) [4**AceMining Upgraded Door Security Bar & Sliding Patio Bar Heavy Duty Stoppers Adjustable Jammer for Home Apartment Travel (1 Pack White)**AceMining**$23.51**4.7★11,714 rev](https://www.amazon.com/dp/B0BKKTFWJK) [5**Home Security Door Reinforcement Lock - Child Proof High Security Door Lock Front Door Locks for Kids Safety Withstand 800 lbs Top Door Latch Lock Flip Door Guardian for Inward Swinging Inside Door**EverPlus**$10.10**4.7★1,839 rev](https://www.amazon.com/dp/B0BVYX7T2N)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Portable Door Lock Door Reinforcement Lock Portable Door Lock for Travel - No Drilling Interior Doors for Apartments Hotels bedrooms**Hareon**$12.31**62 rev8mo ago](https://www.amazon.com/dp/B0G3WP98NG) [**Door Barricade | Door Jam Door Stoppers Security Bar Add Extra Security to Your Inward Opening Front Door at Home - an Innovative Solution for Door Security (Silver/White)**The Door Bull**$49.20**37 rev10mo ago](https://www.amazon.com/dp/B0FRYDZP62) [**Guard Dog Security Blocklock Portable Door Lock Hotel Door Locks for Travelers Security Tough Durable Apartment Door Security Home Security Travel Essentials Easy to Use**Guard Dog Security**$13.56**913 rev1y ago](https://www.amazon.com/dp/B0DDYW3GX9) [**Husfunov 2 Pack Home Security Door Lock Childproof Door Reinforcement Lock with 3 Stop Withstand 800 lbs for Inward Swing Doors Night Kids Safety Metal Flip Lock Deadbolt Latch (Silver)**Husfunov**$10.71**1,653 rev2y ago](https://www.amazon.com/dp/B0D62JGD1R) [**Rerishom Door Security Bar Door Stoppers Security bar Heavy Duty Door Lock Security Door Jammer Door Stopper for Apartment Hotel Room Screen Door Hardware Gate Lock Bar 2 Pack**Rerishom**$35.28**3,444 rev3y ago](https://www.amazon.com/dp/B0C14JSYCH)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Portable Door Lock Door Reinforcement Lock Portable Door Lock for Travel - No Drilling Interior Doors for Apartments Hotels bedrooms**Hareon**$12.31**4.6★**▲ 330%**](https://www.amazon.com/dp/B0G3WP98NG) [**2Pack Door Reinforcement Lock Withstands 800lbs of Force - White Extra Proof Door Lock for Kids Safety Drilling Required Prevents Unauthorized Entry Add a Door Security Locks for Home Safety & Privacy**AceMining**$20.49**4.8★**▲ 321%**](https://www.amazon.com/dp/B0B7JT92N4) [**Cardinal Gates Door Guardian Home Security Door Reinforcement Lock for Inward Swinging Doors - Child Proof Lock Front Door - Extra Lock for Home from Inside - USA Based - Satin Chrome**Cardinal Gates**$21.63**4.8★**▲ 287%**](https://www.amazon.com/dp/B004RL1IO0) [**Cardinal Gates Door Guardian Home Security Door Reinforcement Lock for Inward Swinging Doors - Child Proof Lock Front Door - Extra Lock for Home from Inside - USA Based - White**Cardinal Gates**$20.72**4.8★**▲ 73%**](https://www.amazon.com/dp/B004RL1IMC) [**Guard Dog Security Blocklock Portable Door Lock Hotel Door Locks for Travelers Security Tough Durable Apartment Door Security Home Security Travel Essentials Easy to Use**Guard Dog Security**$13.56**4.3★**▲ 70%**](https://www.amazon.com/dp/B0DDYW3GX9)
**~~View all trending →~~**
## **What buyers say about defender security door lock**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Security**17%
*“Very secure”*
**Locking Mechanism**16%
*“stays in place without any issues”*
**Assembly/Installation**12%
*“Easy to assemble”*
**Quality-Overall**12%
*“Excellent build quality”*
**Strength**9%
*“Very sturdy and easy to set up”*
**Ease Of Use**7%
*“Ease of use”*
**Advertised Vs Actual Product**5%
*“As advertised”*
**Efficiency**5%
*“Definitely works keeps her out”*
**Value For Money**3%
*“Great value”*
**Durability**2%
*“Durable and easy to use”*
### **What buyers complain about **
**Functionality-Overall**13%
*“Doesn't work well”*
**Locking Mechanism**13%
*“Not Secure At All”*
**Size-Overall**8%
*“also too large”*
**Quality-Overall**8%
*“Terrible quality”*
**Compatibility-Overall**6%
*“Incompatible & Cheaply Made”*
**Durability**5%
*“Broke after a week of using”*
**Assembly/Installation**5%
*“Hard to put together”*
**Strength**4%
*“This is not heavy duty at all”*
**Ease Of Use**4%
*“Not user friendly”*
**Weight Heavy**2%
*“Heavier than anticipated”*
### **Top return reasons **
**Size-Overall**34%
**Compatibility-Overall**17%
**Locking Mechanism**11%
**Functionality-Overall**10%
**Advertised Vs Actual Product**4%
**Value For Money**3%
**Mechanism Issues**3%
**Assembly/Installation**3%
**Weight Heavy**3%
**Defective Material/Parts**3%
## **Common questions**
- **Is defender security door lock profitable to sell on Amazon United States?**
- The niche generates $44K/yr across 27 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.6%. Flapen's verdict: Skip it (40/100).
- **How competitive is the defender security door lock niche?**
- 17 brands and 57 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 74% of demand.
- **What do buyers complain about in defender security door lock?**
- Top complaints mined from reviews: Functionality-Overall, Locking Mechanism, Size-Overall. The return rate is 5.1% — above our launch gate.
- **When does demand for defender security door lock peak?**
- Demand peaks in Jan–May; the busiest month runs 2.5× the quietest.
- **What does it cost to enter the defender security door lock niche?**
- Listings span $9.46–$49.20; the average listing price is $18.09 (sweet spot $15–$100). The average incumbent carries 5,555 reviews — the moat a new listing must climb.
## **Related niches in Tools & Home Improvement**
- 73 [**solar outdoor lights**](https://flapen.com/research/us/tools-home-improvement/solar-outdoor-lights)$30.2M/yr+39.8%**Launch it**- 73 [**shower lamp**](https://flapen.com/research/us/tools-home-improvement/shower-lamp)$2.8M/yr+30.2%**Launch it**- 73 [**solar flowers**](https://flapen.com/research/us/tools-home-improvement/solar-flowers)$607K/yr+52.0%**Worth a look**- 73 [**american flag lights**](https://flapen.com/research/us/tools-home-improvement/american-flag-lights)$465K/yr+736.5%**Worth a look**- 73 [**solar fairy lights**](https://flapen.com/research/us/tools-home-improvement/solar-fairy-lights)$3.5M/yr+64.6%**Launch it**- 73 [**solar watering can with cascading lights**](https://flapen.com/research/us/tools-home-improvement/solar-watering-can-with-cascading-lights)$304K/yr+124.3%**Worth a look**[**All Tools & Home Improvement niches **](https://flapen.com/research/us/tools-home-improvement)