---
title: "Whetstone — $2.7M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/whetstone"
last_updated: "2026-08-08T08:45:03.391Z"
locale: en
meta:
description: "Niche score 57/100 · $2.7M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $2.7M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Whetstone — $2.7M/yr Amazon US Niche (2026) - Flapen"
---
# **whetstone**
**Worth a look**
Shows a $2.7M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 96Growth 23Conversion 66Competition 30Returns 94Price range 83Avg price 92Brand share 53Review moat 28Quality gap 27
**Market size**
**Incredible****$2.7M**
$2.7M/yr · 2.0M searches
**Returns**
**Great****1.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$21.70**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.06–$66.98**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.0%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****67%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****3,746.62**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-3.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, whetstone is a $2.7M/yr Amazon United States market (2.0M searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Dec. Verdict: Worth a look — 57/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **whetstone market data**
- **Units sold / yr**
- **100K–125K**
- avg 5,000–6,000/product
- **Revenue / yr**
- **$2.2M–$2.7M**
- units × avg price
- **Conversion rate**
- **6.0%**
- **Avg BSR**
- **#46**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **56 months**
- **Avg seller age**
- **165 days**
## **Competition & brand share**
The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▼falling
**Sellers**
**54**
**Top-5 brand share**
**73%**
Top 20: 100%
**Top-5 click share**
**67%**
Top 20: 99%
**Open market**
**23%**
- KEENBEST20% - Intelitopia20% - Sharp Pebble17% - HMPLL11% - Amazon Basics5% - BABOSTOW5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -3.5% search growth over the last 90 days.
70K50KSpike '24Holiday '24Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Dec · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/whetstone/trend)
## **Top whetstone search terms**
- **sharpening stone**412K/yr-1.8%4.3% conv. - **whetstone**285K/yr+9.2%6.4% conv. - **knife sharpener stone**212K/yr+25.2%4.9% conv. - **knife sharpening stone**225K/yr-25.9%5.2% conv. - **sharpening stones for knives**159K/yr-12.2%5.2% conv. - **whetstones for knife sharpening**48K/yr+144.4%7.0% conv. - **wet stones for sharpening knives**61K/yr+31.8%6.8% conv. - **piedra para afilar cuchillos**104K/yr-15.7%3.6% conv. - **sharpening stones**94K/yr-11.3%1.9% conv. - **wet stone**53K/yr+4.7%5.6% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/whetstone/search-terms)
## **Top whetstone 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%5%$133K10%$266K15%$398K20%$531K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Intelitopia Complete Knife Sharpening Stone Set Dual Grit Whetstone 400/1000 3000/8000 Knife Sharpener with Leather Strop Flattening Stone Bamboo Base 3 Non-slip Rubber Bases & Angle Guide**Intelitopia**$29.64**4.6★7,061 rev](https://www.amazon.com/dp/B08CXQ2SLS) [2**KEENBEST Actual Grit Premium Material Sharpening Stone 2 Side 400 1000 Whetstone Set Kitchen Knife Sharpener Stone Wet Stones for Sharping Knives Kit with Non-slip Rubber Base**KEENBEST**$10.21**4.7★4,472 rev](https://www.amazon.com/dp/B088RKNNYK) [3**Sharp Pebble Whetstone Knife Sharpener 1000/6000 Grit Sharpening Stone**Sharp Pebble**$37.74**4.6★25,575 rev](https://www.amazon.com/dp/B01FZZUL30) [4**HMPLL Knife Sharpening Stone Set Professional Whetstone 4 Side Grit 400/1000 3000/8000 Whetstone Knife Sharpener Stone Set Include Non-slip Base Leather Strop Flattening Stone & Angle Guide**HMPLL**$22.72**4.6★3,854 rev](https://www.amazon.com/dp/B0913DMDP4) [5**MIDO PROFESSIONAL ABRASIVE Knife Sharpening Stone 400/1000 Whetstone Sharpening Stone with Non-Slip Rubber Base for Kitchen Hunting and Pocket Knives or Blades**MIDO Professional Abrasive**$10.11**4.5★2,772 rev](https://www.amazon.com/dp/B0874RJWVM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**BABOSTOW Premium Whetstone Knife Sharpening Stone 2 Side Grit 400/1000 Waterstone & Honing Stones - Whetstone Knife Sharpener - NonSlip Rubber Base for Kitchen Knife Sharpener Stone**BABOSTOW**$9.15**50 rev5mo ago](https://www.amazon.com/dp/B0G5ZR5T67) [**BABOSTOW Premium Whetstone Knife Sharpening Stone 2 Side Grit 1000/6000 Waterstone- Whetstone Knife Sharpener & Hand Hones - Nonslip Bamboo Base & Angle Guide**BABOSTOW**$14.24**231 rev11mo ago](https://www.amazon.com/dp/B0FBLFQ5RT) [**Leking Professional Knife Sharpener & Sharpening Stone Set: 1000/6000 Grit Dual-Sided Whetstone(7x2.4x1.2) with Bamboo Base Non-Slip Silicone Holder Angle Guide & Leather Strop Kit**Leking**$16.76**136 rev11mo ago](https://www.amazon.com/dp/B0FK48Z9HH) [**Ryerum Knife Sharpening Stone Whetstone 1000 Grit Knife Sharpener Enough for Daily Sharpening Stone With 2 Non-Slip Rubber Bases Safety and Easy to Use For Beginners**ryerum**$6.06**525 rev1y ago](https://www.amazon.com/dp/B0DJGYXLFH) [**HiramWare Knife Sharpening Stone with Non-slip Rubber Base 400/1000 Grit Premium Whetstone Double-Sided Knife Sharpener for Kitchen Waterstone for Honing Blades Manually**HiramWare**$9.65**1,027 rev2y ago](https://www.amazon.com/dp/B0CWTP79SP)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**BABOSTOW Premium Whetstone Knife Sharpening Stone 2 Side Grit 400/1000 Waterstone & Honing Stones - Whetstone Knife Sharpener - NonSlip Rubber Base for Kitchen Knife Sharpener Stone**BABOSTOW**$9.15**4.6★**▲ 248%**](https://www.amazon.com/dp/B0G5ZR5T67) [**Wucgea Knife Sharpening Stone Kit - 400/1000 3000/8000 Grit Japanese Whetstone Set with Non-Slip Rubber Base Angle Guide Flattening Stone and Leather Strop**wucgea**$20.60**4.6★**▲ 238%**](https://www.amazon.com/dp/B09Z7RDYV2) [**Bora 501057 Fine/Coarse Combination Sharpening Stone Aluminum Oxide Gray 6**BORA**$8.05**4.4★**▲ 104%**](https://www.amazon.com/dp/B003Y3BMAW) [**KEENBEST Actual Grit Premium Material Sharpening Stone 2 Side 400 1000 Whetstone Set Kitchen Knife Sharpener Stone Wet Stones for Sharping Knives Kit with Non-slip Rubber Base**KEENBEST**$10.21**4.7★**▲ 42%**](https://www.amazon.com/dp/B088RKNNYK) [**Whetstone Knife Sharpening Stone Kit - Double Sided Whetstone Knife Sharpener 1000/6000 Grit Professional Honing Sharpening Stone Set With Slip-Resistant Bamboo Base and Angle Guide**ZGQOOFA**$16.20**4.6★**▲ 39%**](https://www.amazon.com/dp/B0BTMP48XD)
**~~View all trending →~~**
## **What buyers say about whetstone**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sharpness**24%
*“Sharp knives”*
**Quality-Overall**21%
*“Very nice quality stones”*
**Value For Money**14%
*“Great buy”*
**Ease Of Use**8%
*“Easy to use”*
**Advertised Vs Actual Product**8%
*“Just as advertised”*
**Efficiency**5%
*“Performance wise, it does a good job”*
**Instructions/User Manual/Troubleshooting**3%
*“The instructions were good”*
**Precision Of Cut**2%
*“cut much more cleanly”*
**Durability**2%
*“Very durable”*
**Material Quality**2%
*“Great material and size”*
### **What buyers complain about **
**Quality-Overall**18%
*“Not great quality”*
**Sharpness**9%
*“You cant get it razor sharp”*
**Ease Of Use**7%
*“I struggled with it”*
**Value For Money**6%
*“way over priced”*
**Instructions/User Manual/Troubleshooting**6%
*“Followed the rather weak instructions exactly”*
**Durability**5%
*“May need a breaking in phase”*
**Material Quality**5%
*“the bonder or base material is significantly weaker/more porous”*
**Size-Overall**4%
*“Larger than expected”*
**Functionality-Overall**3%
*“The angle guide dose not work well”*
**Advertised Vs Actual Product**2%
*“Does not come with advertised items”*
### **Top return reasons **
**Sharpness**33%
**Size-Overall**14%
**Functionality-Overall**11%
**Advertised Vs Actual Product**9%
**Quality-Overall**6%
**Value For Money**5%
**Defective Material/Parts**3%
**Ease Of Use**3%
**Material Quality**3%
**Product Condition**2%
## **Common questions**
- **Is whetstone profitable to sell on Amazon United States?**
- The niche generates $2.7M/yr across 21 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -3.5%. Flapen's verdict: Worth a look (57/100).
- **How competitive is the whetstone niche?**
- 16 brands and 54 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in whetstone?**
- Top complaints mined from reviews: Quality-Overall, Sharpness, Ease Of Use. The return rate is 1.1%.
- **When does demand for whetstone peak?**
- Demand peaks in Dec; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the whetstone niche?**
- Listings span $6.06–$66.98; the average listing price is $21.70 (sweet spot $15–$100). The average incumbent carries 3,747 reviews — the moat a new listing must climb.
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