---
title: "castile soap bar — $2.1M/yr Amazon United States Niche, Score 62/100 - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/castile-soap-bar"
last_updated: "2026-07-20T20:03:45.040Z"
locale: en
meta:
description: "castile soap bar clears our launch bar: a $2.1M/yr market growing +44.1% this quarter with returns at 0.1%. Data updated Jul 2026."
"og:description": "castile soap bar clears our launch bar: a $2.1M/yr market growing +44.1% this quarter with returns at 0.1%. Data updated Jul 2026."
"og:title": "castile soap bar — $2.1M/yr Amazon United States Niche, Score 62/100 - Flapen"
---
# **castile soap bar**
**Launch it**
A $2.1M/yr market growing +44.1% this quarter with returns at 0.1% — clears our launch bar.
Market size 95Growth 65Conversion 93Competition 55Returns 99Price range 70Avg price 80Brand share 0Review moat 25Quality gap 16
**Returns**
**Incredible****0.1%**
return rate — above 6% kills the launch gate
**Market size**
**Incredible****$2.1M**
$2.1M/yr · 1.1M searches
**Conversion**
**Great****11.4%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$16.83**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$2.80–$43.49**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+44.1%**
90-day search growth — must beat 0% to launch
**Competition**
**Good****52%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****4,256.87**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, castile soap bar is a $2.1M/yr Amazon United States market (1.1M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul. Verdict: Launch it — 62/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **Market data**
- **Units sold / yr**
- **100K–125K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$1.7M–$2.1M**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **11.4%**
- **Avg BSR**
- **#333**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **74%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **71 months**
- **Avg seller age**
- **122 days**
## **Competition**
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**3 **—flat
**Sellers**
**137**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**52%**
Top 20: 96%
**Open market**
**0%**
- Dr. Bronner's81% - Kirk's15% - Dr. Natural4% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +44.1% search growth over the last 90 days.
30K20KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jul · busiest ÷ quietest = 2.4×
[**Open Trend **](https://flapen.com/research/us/baby-products/castile-soap-bar/trend)
## **Product shelf**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$103K10%$206K15%$309K20%$412K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Dr. Bronners - Pure-Castile Bar Soap (Baby Unscented 5 ounce 2-pack) - Made with Organic Oils For Face Body Hair Gentle for Sensitive Skin Babies No Added Fragrance Biodegradable Vegan**Dr. Bronner's**$9.16**4.8★6,703 rev](https://www.amazon.com/dp/B00JF2PYVE) [2**Dr. Bronners Pure-Castile Magic Bar Soap - Made with Regenerative Organic Certified Oils - For Face Body Hair- Gentle on Sensitive Skin - Vegan Soap Bars for Men & Women - Lavender 2 Pack 5oz**Dr. Bronner's**$9.98**4.8★5,967 rev](https://www.amazon.com/dp/B001E0T740) [3**Dr. Bronners Pure-Castile Magic Bar Soaps (5 Ounce Variety Gift Pack) Almond Unscented Lavender Peppermint Citrus Rose - Made with Regenerative Organic Certified Oils Vegan Non-GMO**Dr. Bronner's**$28.81**4.8★2,948 rev](https://www.amazon.com/dp/B0CLSXQ2YG) [4**Dr. Bronners Pure-Castile Magic Bar Soaps (Peppermint 5oz 2-Pack) Made with Regenerative Organic Certified Oils Soap Bars for Men & Women Gentle for Face & Body Vegan Non-GMO**Dr. Bronner's**$10.00**4.8★6,839 rev](https://www.amazon.com/dp/B00JF2O4IS) [5**Dr. Bronners Pure-Castile Magic Soap Bars (Peppermint 5 oz 6-Pack) - Made with Regenerative Organic Certified Oils - For Face Body & Hair - Gentle Vegan - Bar Soaps for Men & Women**Dr. Bronner's**$26.99**4.8★6,839 rev](https://www.amazon.com/dp/B001ET77O8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Dr. Bronners Pure-Castile Magic Bar Soap- Made with Regenerative Organic Certified Oils- For Face Body Hair Vegan Soap Bars for Men & Women- Variety 3-Pack Peppermint Lavender Unscented**Dr. Bronner's**$15.25**2,948 rev1y ago](https://www.amazon.com/dp/B0DBSGKCZ9) [**Dr. Bronners Pure-Castile Magic Bar Soaps (5 Ounce Variety Gift Pack) Almond Unscented Lavender Peppermint Citrus Rose - Made with Regenerative Organic Certified Oils Vegan Non-GMO**Dr. Bronner's**$28.81**2,948 rev2y ago](https://www.amazon.com/dp/B0CLSXQ2YG) [**Dr. Natural Castile Bar Soap - Multipurpose Soap Bar with Anti-Acne Properties - for Face Body Hair - Sensitive Skin Body Wash - Peppermint - 2 pcs**Dr. Natural**$3.06**818 rev4y ago](https://www.amazon.com/dp/B09NC6TDNN) [**Dr. Bronners Pure-Castile Magic Bar Soap (5 oz Variety Pack) Almond Unscented Lavender Peppermint Citrus Rose Tea Tree & Eucalyptus - Made with Regenerative Organic Certified Oils Vegan**Dr. Bronner's**$43.49**2,948 rev4y ago](https://www.amazon.com/dp/B099BLP18C) [**Kirks Castile Bar Soap Original Fresh Scent - Clinically Tested Safe for Sensitive Skin with Coconut Oil Vegan and Non-GMO - 4 oz Bars 6 Pack and Fragrance Free Travel Bar**Kirk's**$14.76**1,849 rev7y ago](https://www.amazon.com/dp/B0G2SWMCJ1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kirks Castile Bar Soap Original Fresh Scent - Clinically Tested Safe for Sensitive Skin with Coconut Oil Vegan and Non-GMO - 4 oz Bars 6 Pack and Fragrance Free Travel Bar**Kirk's**$14.76**4.6★**▲ 206%**](https://www.amazon.com/dp/B0G2SWMCJ1) [**Kirks Fragrance Free Castile Bar Soap (Pack of 3)**Kirk's**$7.35**4.7★**▲ 77%**](https://www.amazon.com/dp/B00RLUP6M4) [**Kirks Castile Bar Soap for Men Women & Children - Made With Premium Coconut Oil Sensitive Skin Formula Vegan Non GMO Original Fresh Scent 4 oz. Bars 6 Pack**Kirk's**$11.52**4.7★**▲ 70%**](https://www.amazon.com/dp/B01BH7ZFN6) [**Dr. Bronners Pure-Castile Magic Bar Soap (5 oz Variety Pack) Almond Unscented Lavender Peppermint Citrus Rose Tea Tree & Eucalyptus - Made with Regenerative Organic Certified Oils Vegan**Dr. Bronner's**$43.49**4.8★**▲ 66%**](https://www.amazon.com/dp/B099BLP18C) [**Dr. Natural Castile Bar Soap - Multipurpose Soap Bar with Anti-Acne Properties - for Face Body Hair - Sensitive Skin Body Wash - Peppermint - 2 pcs**Dr. Natural**$3.06**4.4★**▲ 60%**](https://www.amazon.com/dp/B09NC6TDNN)
**~~View all trending →~~**
## **Reviews**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Smell**25%
*“Amazing Smell”*
**Cleansing**12%
*“cleans well”*
**Quality-Overall**11%
*“Great variety,”*
**Lather**8%
*“Excellent lather”*
**Soft Feel**6%
*“Soft skin”*
**Value For Money**5%
*“Best price”*
**Ease Of Cleaning**4%
*“Cleans really good”*
**Moist/Dry**3%
*“Helps with dry skin”*
**Allergies**3%
*“No itching”*
**Suitability Combination Skin**3%
*“Good for sensitive skin”*
### **What buyers complain about **
**Smell**25%
*“Not fragrance free”*
**Allergies**10%
*“Makes me itch”*
**Value For Money**7%
*“More expensive”*
**Moist/Dry**6%
*“It was too dry for my sensitive skin”*
**Sensitivity-Overall**3%
*“I have extremely sensitive skin”*
**Skin Health**2%
*“There is something in it that burns the skin really bad”*
**Size-Overall**2%
*“Bars are much smaller than expected”*
**Advertised Vs Actual Product**2%
*“Not as advertised”*
**Durability**2%
*“doesnt last as long”*
**Ingredients-Overall**1%
*“What cheap additives has the company decided to use”*
### **Top return reasons **
**Smell**50%
**Advertised Vs Actual Product**13%
**Value For Money**8%
**Size-Overall**4%
**Defective Material/Parts**4%
**Ingredients-Overall**3%
**Moist/Dry**2%
**Functionality-Overall**2%
**Skin Health**2%
**Lather**1%
## **Common questions**
- **Is castile soap bar profitable to sell on Amazon United States?**
- The niche generates $2.1M/yr across 23 tracked products. 90-day search growth is +44.1%. Flapen's verdict: Launch it (62/100).
- **How competitive is the castile soap bar niche?**
- 3 brands and 137 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in castile soap bar?**
- Top complaints mined from reviews: Smell, Allergies, Value For Money. The return rate is 0.1%.
- **When does demand for castile soap bar peak?**
- Demand peaks in Jul; the busiest month runs 2.4× the quietest.
- **What does it cost to enter the castile soap bar niche?**
- Listings span $2.80–$43.49; the average listing price is $16.83 (sweet spot $15–$100). The average incumbent carries 4,257 reviews — the moat a new listing must climb.
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