---
title: "Door Chain Lock — $339K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/door-chain-lock"
last_updated: "2026-08-09T00:26:10.145Z"
locale: en
meta:
description: "Niche score 47/100 · $339K/yr market · 438K searches/yr · $9.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $339K/yr market · 438K searches/yr · $9.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Door Chain Lock — $339K/yr Amazon US Niche (2026) - Flapen"
---
# **door chain lock**
**Skip it**
Pricing outside the sweet spot ($9.54 avg) — this niche doesn't clear our bar today.
Market size 53Growth 33Conversion 79Competition 52Returns 33Price range 35Avg price 29Brand share 61Review moat 45Quality gap 35
**Conversion**
**Great****8.1%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****68%**
top-5 brand share — brands hold most of the demand
**Market size**
**Good****$339K**
$339K/yr · 438K searches
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****1,973.35**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Price range**
**Okay****$4.23–$20.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+6.6%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****4.4%**
return rate — above 5% kills the launch gate
**Avg price**
**Okay****$9.54**
avg listing price — sweet spot $15–$100
According to Flapen's Amazon United States niche tracking, door chain lock is a $339K/yr Amazon United States market (438K searches/yr). The top 5 brands hold 68% of demand. Verdict: Skip it — 47/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **door chain lock market data**
- **Units sold / yr**
- **30K–40K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$286K–$382K**
- units × avg price
- **Conversion rate**
- **8.1%**
- **Avg BSR**
- **#59**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **85%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **172 days**
## **Competition & brand share**
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▼falling
**Sellers**
**31**
**Top-5 brand share**
**68%**
Top 20: 100%
**Top-5 click share**
**54%**
Top 20: 100%
**Open market**
**25%**
- fitoon31% - PRIME-LINE12% - INBOF9% - EverPlus9% - Alise8% - KRYVLEXA7%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +6.6% search growth over the last 90 days.
10K6KPrime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/door-chain-lock/trend)
## **Top door chain lock search terms**
- **door chain lock**120K/yr+10.9%7.1% conv. - **chain lock for door**68K/yr+20.0%7.9% conv. - **door chain**56K/yr+2.9%5.4% conv. - **chain door lock**31K/yr+16.8%7.7% conv. - **door chain lock heavy duty**29K/yr-8.1%3.8% conv. - **door lock chain**22K/yr-3.8%6.3% conv. - **chain locks for inside door**46K/yr-29.4%6.5% conv. - **chain for door**8K/yr+14.5%6.1% conv. - **front door chain lock**8K/yr+11.9%6.0% conv. - **chain latch**5K/yr+25.0%4.1% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/door-chain-lock/search-terms)
## **Top door chain 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%$34K20%$68K30%$102K40%$136K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Fitoon 2 Pack Door Chain Lock Black Security Door Chain for Inside Door Premium Thickened Chain Door Lock with 12 Screws**fitoon**$6.08**4.5★1,085 rev](https://www.amazon.com/dp/B0DBJ4YW51) [2**INBOF 2 Pack Door Chain Lock Stainless Steel Chain Locks for Inside Door Premium Thickened with 12 Screws**INBOF**$5.69**4.6★2,745 rev](https://www.amazon.com/dp/B08FBVNFGR) [3**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) [4**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) [5**JQK Door Chain Lock Black Stainless Steel Door Guard with Spring Anti-Theft Press Lock Matte Black HDC100-PB**JQK**$7.91**4.5★1,271 rev](https://www.amazon.com/dp/B08FY4KFCN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Alise Door Chain Lock Matte Black Adjustable Child Proof Security Door Lock for Apartment**Alise**$7.92**41 rev8mo ago](https://www.amazon.com/dp/B0G43Y1JJD) [**Fitoon 2 Pack Door Chain Lock Stainless Steel Security Door Chain for Inside Door Premium Thickened Chain Door Lock with 12 Screws**fitoon**$4.44**184 rev11mo ago](https://www.amazon.com/dp/B0FL2XTJMN) [**Heavy Duty 304 Stainless Steel Door Chain Lock Spring-Loaded Anti-Tamper Security Latch & Door Restrictor Child Safety Lock for Front & Back Doors Home Apartment & Hotel Black**KRYVLEXA**$9.88**36 rev1y ago](https://www.amazon.com/dp/B0FCXSKZK4) [**Heavy Duty 304 Stainless Steel Door Chain Lock Spring-Loaded Anti-Tamper Security Latch & Door Restrictor Child Safety Lock for Front & Back Doors Home Apartment & Hotel Silver**KRYVLEXA**$9.72**36 rev1y ago](https://www.amazon.com/dp/B0FCXSN7KT) [**Fitoon 2 Pack Door Chain Lock Black Security Door Chain for Inside Door Premium Thickened Chain Door Lock with 12 Screws**fitoon**$6.08**1,085 rev1y ago](https://www.amazon.com/dp/B0DBJ4YW51)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Heavy Duty 304 Stainless Steel Door Chain Lock Spring-Loaded Anti-Tamper Security Latch & Door Restrictor Child Safety Lock for Front & Back Doors Home Apartment & Hotel Black**KRYVLEXA**$9.88**4.1★**▲ 166%**](https://www.amazon.com/dp/B0FCXSKZK4) [**Alise Door Chain Lock Matte Black Adjustable Child Proof Security Door Lock for Apartment**Alise**$7.92**4.4★**▲ 149%**](https://www.amazon.com/dp/B0G43Y1JJD) [**Prime-Line MP10304 Chain Door Lock 3-5/16 In. Extruded Brass Satin Nickel-Plated 6 In. Chain (Single Pack)**PRIME-LINE**$4.23**4.7★**▲ 143%**](https://www.amazon.com/dp/B0778XZ8NZ) [**Heavy Duty 304 Stainless Steel Door Chain Lock Spring-Loaded Anti-Tamper Security Latch & Door Restrictor Child Safety Lock for Front & Back Doors Home Apartment & Hotel Silver**KRYVLEXA**$9.72**4.1★**▲ 60%**](https://www.amazon.com/dp/B0FCXSN7KT) [**Defender Security U 10305 Prime Line Standard Chain Door Guard Solid Classic Bronze**PRIME-LINE**$10.96**4.6★**▲ 33%**](https://www.amazon.com/dp/B00BAFISCG)
**~~View all trending →~~**
## **What buyers say about door chain lock**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Assembly/Installation**18%
*“Easy to setup”*
**Locking Mechanism**17%
*“Door lock”*
**Security**14%
*“Solid security”*
**Quality-Overall**13%
*“Excellent product”*
**Strength**8%
*“Sturdy and Easy to Install”*
**Value For Money**5%
*“reasonably priced”*
**Advertised Vs Actual Product**5%
*“works as advertised”*
**Ease Of Use**4%
*“Easy to use”*
**Efficiency**4%
*“Works/Effective”*
**Durability**2%
*“Durable and easy to use”*
### **What buyers complain about **
**Durability**15%
*“It broke after three days”*
**Size-Overall**10%
*“Small”*
**Locking Mechanism**7%
*“The mechanism is failing”*
**Strength**5%
*“Flimsy”*
**Assembly/Installation**5%
*“Little finicky to install”*
**Quality-Overall**5%
*“Cheap, unattractive & doesnt work”*
**Instructions/User Manual/Troubleshooting**4%
*“However, the instructions could be better”*
**Compatibility-Overall**4%
*“Not compatible”*
**Value For Money**3%
*“its an additional cost to others”*
**Functionality-Overall**3%
*“Nice concept not effective”*
### **Top return reasons **
**Size-Overall**39%
**Compatibility-Overall**20%
**Locking Mechanism**9%
**Functionality-Overall**7%
**Value For Money**4%
**Assembly/Installation**4%
**Advertised Vs Actual Product**3%
**Color**3%
**Defective Material/Parts**2%
**Mechanism Issues**2%
## **Common questions**
- **Is door chain lock profitable to sell on Amazon United States?**
- The niche generates $339K/yr across 20 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +6.6%. Flapen's verdict: Skip it (47/100).
- **How competitive is the door chain lock niche?**
- 12 brands and 31 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 68% of demand.
- **What do buyers complain about in door chain lock?**
- Top complaints mined from reviews: Durability, Size-Overall, Locking Mechanism. The return rate is 4.4%.
- **When does demand for door chain lock peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the door chain lock niche?**
- Listings span $4.23–$20.79; the average listing price is $9.54 (sweet spot $15–$100). The average incumbent carries 1,973 reviews — the moat a new listing must climb.
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