defender security door lock
Skip itA small market ($44K/yr) — this niche doesn't clear our bar today.
Price range
Great$9.46–$49.20cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$18.09avg listing price — sweet spot $15–$100
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Brand share
Good74%top-5 brand share — brands hold most of the demand
Conversion
Okay2.9%search→purchase rate — share of searches ending in a sale
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+4.6%90-day search growth — must beat 0% to launch
Returns
Bad5.1%return rate — above 5% kills the launch gate
Review moat
Bad5,555.19avg incumbent reviews — the moat a new listing must climb
Market size
Bad$44K$44K/yr · 83K searches
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
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.Peak months: Jan, May · busiest ÷ quietest = 2.5×
Top defender security door lock search terms
- door guardian10K/yr
- renter friendly extra door lock9K/yr
- renter friendly security8K/yr
- door guardian lock6K/yr
- privacy door latch5K/yr
- defender security door lock7K/yr
- security door guard6K/yr
- door security guard4K/yr
- emergency door lock5K/yr
- door bull14K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$11.304.8★5,352 rev
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$17.004.7★7,433 rev
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$20.724.8★3,093 rev
AceMining Upgraded Door Security Bar & Sliding Patio Bar Heavy Duty Stoppers Adjustable Jammer for Home Apartment Travel (1 Pack White)
AceMining$23.514.7★11,714 rev
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$10.104.7★1,839 rev
Newest
by launch date
Portable Door Lock Door Reinforcement Lock Portable Door Lock for Travel - No Drilling Interior Doors for Apartments Hotels bedrooms
Hareon$12.3162 rev
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$49.2037 rev
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$13.56913 rev
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$10.711,653 rev
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$35.283,444 rev
Trending
90-day click momentumPortable Door Lock Door Reinforcement Lock Portable Door Lock for Travel - No Drilling Interior Doors for Apartments Hotels bedrooms
Hareon$12.314.6★
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$20.494.8★
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$21.634.8★
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$20.724.8★
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$13.564.3★
What buyers say about defender security door lock
What buyers praise and complain about, mined from review topics.What buyers love
“Very secure”
“stays in place without any issues”
“Easy to assemble”
“Excellent build quality”
“Very sturdy and easy to set up”
“Ease of use”
“As advertised”
“Definitely works keeps her out”
“Great value”
“Durable and easy to use”
What buyers complain about
“Doesn't work well”
“Not Secure At All”
“also too large”
“Terrible quality”
“Incompatible & Cheaply Made”
“Broke after a week of using”
“Hard to put together”
“This is not heavy duty at all”
“Not user friendly”
“Heavier than anticipated”
Top return reasons
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.