---
title: "Rainbow Knife — $29K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/rainbow-knife"
last_updated: "2026-08-08T17:32:17.180Z"
locale: en
meta:
description: "Niche score 53/100 · $29K/yr market · 93K searches/yr · $19.95 avg price. A small market ($29K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $29K/yr market · 93K searches/yr · $19.95 avg price. A small market ($29K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Rainbow Knife — $29K/yr Amazon US Niche (2026) - Flapen"
---
# **rainbow knife**
**Worth a look**
Shows low returns (0.9%), but a small market ($29K/yr) keeps it on the watch list.
Market size 7Growth 38Conversion 20Competition 90Returns 96Price range 51Avg price 87Brand share 76Review moat 45Quality gap 43
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Competition**
**Great****25%**
top-5 click share — an open shelf
**Avg price**
**Great****$19.95**
avg listing price — sweet spot $15–$100
**Brand share**
**Great****59%**
top-5 brand share — no brand owns this niche
**Price range**
**Good****$5.85–$171.45**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****1,966.35**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+10.4%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****1.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$29K**
$29K/yr · 93K searches
According to Flapen's Amazon United States niche tracking, rainbow knife is a $29K/yr Amazon United States market (93K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Dec. Verdict: Worth a look — 53/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rainbow knife market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$30K–$40K**
- units × avg price
- **Conversion rate**
- **1.6%**
- **Avg BSR**
- **#707**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **58%**
- **Out of stock**
- **5.7%**
- **Avg brand age**
- **56 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
Clicks spread well past the top 5 (25% combined) — an open shelf where new products get seen.
**Brands**
**37 **—flat
**Sellers**
**85**
**Top-5 brand share**
**59%**
Top 20: 90%
**Top-5 click share**
**25%**
Top 20: 60%
**Open market**
**37%**
- Tac-Force40% - Kershaw5% - WWZJ5% - GOOD WORKER5% - Vividstill5% - FUNBRO4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +10.4% search growth over the last 90 days.
3K2KHoliday '24Black Friday '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Dec · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/rainbow-knife/trend)
## **Top rainbow knife search terms**
- **rainbow knife**20K/yr+3.8%1.2% conv. - **tac force knife**22K/yr-11.5%0.6% conv. - **rainbow pocket knife**14K/yr+30.4%1.4% conv. - **tac force pocket knife**10K/yr+90.8%0.8% conv. - **tac force**8K/yr-7.8%0.6% conv. - **rainbow knives**5K/yr+11.9%1.7% conv. - **pocket knife rainbow**3K/yr+33.7%1.7% conv. - **tac force spring assisted knife**4K/yr+2.8%1.2% conv. - **tac-force**3K/yr+8.4%0.5% conv. - **tac force knives**3K/yr-3.4%0.3% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/rainbow-knife/search-terms)
## **Top rainbow knife 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%2%$5884%$1K6%$2K8%$2K1101001K10K100K 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**Tac-Force- Folding Pocket Knife Rainbow TiNite Coated Stainless Steel Blade and Handle Glass Punch and Pocket Clip Tactical EDC Rescue - TF-844**Tac-Force**$8.64**4.4★579 rev](https://www.amazon.com/dp/B00V7RFRI0) [2**Tac-Force- Folding Pocket Knife Black Partially Serrated Blade with Black and Red Aluminum Handle Rope Cutter Glass Punch and Pocket Clip Tactical EDC Rescue - TF-723FD**Tac-Force**$11.84**4.6★2,561 rev](https://www.amazon.com/dp/B0089AE19O) [3**WWZJ 2 Pack Pocket Knife (Multicolored Titanium) with Key Ring Easy To Everyday Carry Folding Knife Self-Defense**WWZJ**$7.68**4.5★473 rev](https://www.amazon.com/dp/B0C1KB7KGS) [4**Tac-Force- Folding Pocket Knife Partially Serrated Black Stainless Steel Blade with Black Nylon Fiber Handle and Pocket Clip Tactical EDC Rescue - TF-800BK**Tac-Force**$8.48**4.3★989 rev](https://www.amazon.com/dp/B00CHKNC3I) [5**Kershaw Outcome Pocket Knife Rainbow 2.8 Inch Drop Point Blade**Kershaw**$47.28**4.6★35 rev](https://www.amazon.com/dp/B0DTWR3M75)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Tac-Force Pocket Folding Knife 7.75-Inch Overall Length Red Aluminum Handle 3Cr13MoV Steel Blade Camping Hunting EDC**Tac-Force**$12.79**4 rev10mo ago](https://www.amazon.com/dp/B0FPHRPV1Z) [**Kershaw Outcome Pocket Knife Rainbow 2.8 Inch Drop Point Blade**Kershaw**$47.28**35 rev1y ago](https://www.amazon.com/dp/B0DTWR3M75) [**Premium Hunting Knife with Leather Sheath 4.2 Damascus Style Fixed Blade Knife Rainbow Titanium Coated German High Carbon Steel Two-Tone Wood Handle Unique Outdoor EDC Knife Gift for Men and Women**SAN TONG XIONG**$39.80**30 rev1y ago](https://www.amazon.com/dp/B0DTP6ZSZG) [**Rainbow Keychain Knife Cool Folding Knife Box Cutter Small Pocket Knife Gift for Men Mini EDC Knives for Everyday Carry Small Gift for Women Men**COOL PARD EDC**$9.92**437 rev1y ago](https://www.amazon.com/dp/B0DL9TZ8S3) [**FUNBRO Rainbow Pocket Knife for Men & Women - EDC Folding Knives with Clip**FUNBRO**$9.34**3,769 rev2y ago](https://www.amazon.com/dp/B0D9VSWJ4Y)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Maelstrom Mens Tac Force 8 Inch Zipper Tactical Boot Tan 13 W US**Maelstrom**$47.81**4.2★**▲ 268%**](https://www.amazon.com/dp/B00E24YADS) [**Tac-Force Pocket Folding Knife 7.75-Inch Overall Length Red Aluminum Handle 3Cr13MoV Steel Blade Camping Hunting EDC**Tac-Force**$12.79**3.8★**▲ 174%**](https://www.amazon.com/dp/B0FPHRPV1Z) [**Tac-Force- Folding Pocket Knife Black and Satin Finish Partially Serrated Blade Black Aluminum Handle Rope Cutter Glass Punch and Pocket Clip Tactical EDC Rescue - TF-710BK**Tac-Force**$11.22**4.0★**▲ 76%**](https://www.amazon.com/dp/B007SXKVY2) [**Premium Hunting Knife with Leather Sheath 4.2 Damascus Style Fixed Blade Knife Rainbow Titanium Coated German High Carbon Steel Two-Tone Wood Handle Unique Outdoor EDC Knife Gift for Men and Women**SAN TONG XIONG**$39.80**4.5★**▲ 69%**](https://www.amazon.com/dp/B0DTP6ZSZG) [**Smith & Wesson CKLPR 5.3in High Carbon S.S. Folding Knife with a 2.3in Drop Point Blade and Rainbow Handle for Outdoor Tactical Survival and EDC**Smith & Wesson**$11.25**4.4★**▲ 57%**](https://www.amazon.com/dp/B000NB976Y)
**~~View all trending →~~**
## **What buyers say about rainbow knife**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sharpness**26%
*“It's sharp”*
**Quality-Overall**14%
*“Excellent Quality – Makes a Great Gift”*
**Color**11%
*“The colors are cool”*
**Value For Money**10%
*“Great value”*
**Advertised Vs Actual Product**5%
*“As advertised”*
**Ease Of Use**5%
*“easy to operate”*
**Size-Overall**4%
*“Nice size”*
**Durability**4%
*“Pretty durable”*
**Design-Overall**3%
*“the design is great”*
**Efficiency**2%
*“Works perfectly”*
### **What buyers complain about **
**Size-Overall**11%
*“Tight”*
**Durability**11%
*“it keeps falling apart”*
**Sharpness**11%
*“The knives are not Sharp at all”*
**Ease Of Use**9%
*“it doesn't open properly”*
**Quality-Overall**8%
*“Cheap crappy quality”*
**Strength**5%
*“The clips are super flimsy and bend easily”*
**Weight Heavy**5%
*“heavier than I anticipated”*
**Grip**2%
*“he doesnt like the grip”*
**Functionality-Overall**2%
*“Twice burned, won't do it again”*
**Design-Overall**2%
*“But its craftsmanship doesnt uphold to the look of it”*
### **Top return reasons **
**Size-Overall**25%
**Functionality-Overall**9%
**Sharpness**7%
**Advertised Vs Actual Product**7%
**Ease Of Use**7%
**Color**5%
**Quality-Overall**5%
**Value For Money**5%
**Weight Heavy**5%
**Defective Material/Parts**4%
## **Common questions**
- **Is rainbow knife profitable to sell on Amazon United States?**
- The niche generates $29K/yr across 84 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is +10.4%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the rainbow knife niche?**
- 37 brands and 85 sellers compete. The top 5 products take 25% of clicks and top 5 brands hold 59% of demand.
- **What do buyers complain about in rainbow knife?**
- Top complaints mined from reviews: Size-Overall, Durability, Sharpness. The return rate is 0.9%.
- **When does demand for rainbow knife peak?**
- Demand peaks in Dec; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the rainbow knife niche?**
- Listings span $5.85–$171.45; the average listing price is $19.95 (sweet spot $15–$100). The average incumbent carries 1,966 reviews — the moat a new listing must climb.
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