Is lock profitable to sell on Amazon United States?

The niche generates $8.5M/yr across 54 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -0.7%. Flapen's verdict: Worth a look (59/100).

How competitive is the lock niche?

17 brands and 185 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in lock?

Top complaints mined from reviews: Locking Mechanism, Quality-Overall, Durability. The return rate is 2.2%.

When does demand for lock peak?

Demand peaks in Aug; the busiest month runs 1.9× the quietest.

What does it cost to enter the lock niche?

Listings span $5.53–$35.04; the average listing price is $11.47 (sweet spot $15–$100). The average incumbent carries 8,657 reviews — the moat a new listing must climb.

lock

Worth a look

Shows a $8.5M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size

Incredible$8.5M

$8.5M/yr · 9.0M searches

Conversion

Great8.2%

search→purchase rate — share of searches ending in a sale

Competition

Great36%

top-5 click share — an open shelf

Returns

Good2.2%

return rate — above 5% kills the launch gate

Price range

Good$5.53–$35.04

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Okay$11.47

avg listing price — sweet spot $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay89%

top-5 brand share — brands hold most of the demand

Growth

Bad-0.7%

90-day search growth — must beat 0% to launch

Review moat

Bad8,657.3

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, lock is a $8.5M/yr Amazon United States market (9.0M searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Aug. Verdict: Worth a look — 59/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

lock market data

Units sold / yr: 800K–1.0M; avg 15,000–20,000/product
Revenue / yr: $9.2M–$11.5M; units × avg price
Conversion rate: 8.2%
Avg BSR: #18
Page quality: 0%
Prime: 100%
Sponsored: 89%
Out of stock: 0.0%
Avg brand age: 49 months
Avg seller age: 154 days

Competition & brand share

Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.

Brands

17 falling

Sellers

185

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

36%

Top 20: 75%

Open market

Master Lock37%
Puroma36%
Amazon Basics9%
ZHEGE5%
Fayleeko3%
SEPOX2%
Open — no brand owns it (11 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.7% search growth over the last 90 days.

Peak months: Aug · busiest ÷ quietest = 1.9×

Open Trend

Top lock search terms

lock2.1M/yr -5.0%5.4% conv.
locker lock1.3M/yr -16.6%7.1% conv.
combination lock948K/yr +9.6%8.5% conv.
padlock629K/yr +10.0%5.2% conv.
master lock564K/yr +4.0%4.4% conv.
locks493K/yr +9.3%2.9% conv.
locks with keys304K/yr +61.6%4.2% conv.
padlock with key302K/yr +11.4%6.8% conv.
gym lock324K/yr -34.2%9.0% conv.
combo lock232K/yr +8.6%9.8% conv.

All search terms

Top 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.

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

Puroma 2 Pack Combination Lock 4 Digit Padlock for School Gym Locker Sports Locker Fence Toolbox Case Hasp Storage (Black & Code Window)

Puroma$8.744.5★33,990 rev

Amazon Basics 4-Digit Combination Lock Black 2-Pack

Amazon Basics$8.264.4★7,965 rev

Master Lock 1530DCM Locker Lock Combination Padlock 1 Count (Pack of 1) Colors May Vary

Master Lock$6.204.6★16,907 rev

Puroma 1 Pack Combination Lock for Locker 4 Digit Outdoor Waterproof Padlock for School Gym Sports Fence Toolbox Gate Case Outdoor Hasp Storage Cabinets (Black)

Puroma$7.154.5★33,990 rev

Puroma 1 Pack Combination Lock for Locker 4 Digit Outdoor Waterproof Padlock for School Gym Sports Fence Toolbox Gate Case Outdoor Hasp Storage (Purple)

Puroma$7.094.5★33,990 rev

Newest

by launch date

Puroma Combination Lock 4 Digit Waterproof Locker Locks Secure Outdoor Padlock for Gym Lockers Toolboxes Gates Fences Storage Sports Locker Cabinets (Basic Pink Rose)

Puroma$7.001,220 rev

1y ago

Puroma Keyed Padlock with 2 Keys Alike 7/8 Inch Locker Lock 40mm Heavy-Duty Locks for School Gym Locker Gate Fence Hasp Cabinet Toolbox (Pink)

Puroma$6.734,391 rev

1y ago

Puroma 1 Pack Combination Lock for Locker 4 Digit Outdoor Waterproof Padlock for School Gym Sports Fence Toolbox Gate Case Outdoor Hasp Storage (Purple)

Puroma$7.0933,990 rev

2y ago

Puroma 1 Pack Combination Lock for Locker 4 Digit Outdoor Waterproof Padlock for School Gym Sports Fence Toolbox Gate Case Outdoor Hasp Storage (Pink)

Puroma$7.0733,990 rev

2y ago

ZHEGE Combination Lock Gym Locker Lock 4 Digit Combination Padlock (Pink)

ZHEGE$7.0118,329 rev

3y ago

What buyers say about lock

What buyers praise and complain about, mined from review topics.

What buyers love

Locking Mechanism30%

“Secure Locks”

Quality-Overall11%

“Build quality feels solid”

Ease Of Use10%

“Easy to open”

Value For Money7%

“Great deal”

Advertised Vs Actual Product7%

“As advertised”

Strength5%

“solid, easy to set”

Size-Overall4%

“Love it fit for what I needed it for”

Efficiency3%

“It works fine”

Assembly/Installation3%

“Easy to install”

Durability3%

“Great durable budget choice”

What buyers complain about

Locking Mechanism25%

“Defective Lock”

Quality-Overall10%

“Bad quality”

Durability10%

“Fell apart”

Functionality-Overall6%

“Didn't work”

Size-Overall5%

“was too short to fit on my 15 foot U-Haul truck”

Rusts/Corrodes5%

“rusted within a month”

Ease Of Use5%

“Difficult to operate”

Advertised Vs Actual Product3%

“Very deceiving”

Instructions/User Manual/Troubleshooting3%

“the instructions are terrible”

Value For Money2%

“Ehhh kinda cheap”

Top return reasons

Size-Overall41%

Locking Mechanism24%

Functionality-Overall8%

Value For Money5%

Advertised Vs Actual Product3%

Mechanism Issues2%

Defective Material/Parts2%

Weight Heavy2%

Thickness1%

Quality-Overall1%

Common questions

Is lock profitable to sell on Amazon United States?: The niche generates $8.5M/yr across 54 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -0.7%. Flapen's verdict: Worth a look (59/100).
How competitive is the lock niche?: 17 brands and 185 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in lock?: Top complaints mined from reviews: Locking Mechanism, Quality-Overall, Durability. The return rate is 2.2%.
When does demand for lock peak?: Demand peaks in Aug; the busiest month runs 1.9× the quietest.
What does it cost to enter the lock niche?: Listings span $5.53–$35.04; the average listing price is $11.47 (sweet spot $15–$100). The average incumbent carries 8,657 reviews — the moat a new listing must climb.