fermentation jar
Launch itA $1.1M/yr market growing +11.5% this quarter with returns at 1.5% — clears our launch bar.
Avg price
Incredible$29.98avg listing price — sweet spot $15–$100
Price range
Great$11.17–$56.67cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great1.5%return rate — above 5% kills the launch gate
Competition
Great33%top-5 click share — an open shelf
Brand share
Great53%top-5 brand share — no brand owns this niche
Market size
Great$1.1M$1.1M/yr · 810K searches
Review moat
Good732.37avg incumbent reviews — the moat a new listing must climb
Conversion
Good4.7%search→purchase rate — share of searches ending in a sale
Growth
Okay+11.5%90-day search growth — must beat 0% to launch
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, fermentation jar is a $1.1M/yr Amazon United States market (810K searches/yr). The top 5 brands hold 53% of demand. Demand peaks in Jul. Verdict: Launch it — 68/100.
Data updated Aug 5, 2026 · scored weekly · How we score niches
fermentation jar market data
- Units sold / yr
- 30K–40K
- avg 250–500/product
- Revenue / yr
- $899K–$1.2M
- units × avg price
- Conversion rate
- 4.7%
- Avg BSR
- #232
- Page quality
- 0%
- Prime
- 98%
- Sponsored
- 98%
- Out of stock
- 2.4%
- Avg brand age
- 41 months
- Avg seller age
- 163 days
Competition & brand share
Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.Brands
28 rising
Sellers
56
Top-5 brand share
53%
Top 20: 93%
Top-5 click share
33%
Top 20: 67%
Open market
43%
- Masontops15%
- JILLMO11%
- IceFun10%
- Glolaurge9%
- Hersolm8%
- Qianfenie4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +11.5% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 1.5×
Top fermentation jar search terms
- fermentation jar298K/yr
- fermentation kit172K/yr
- fermenting jar63K/yr
- fermentation54K/yr
- fermenting kit35K/yr
- fermenting jars33K/yr
- sauerkraut fermentation kit26K/yr
- fermentation jars26K/yr
- mason jar fermentation kit16K/yr
- fermenting supplies16K/yr
Top fermentation jar 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
4-Pack Mason Jar Fermentation Kit With Four 32 Oz Jars And Plastic Lids
IceFun$37.294.6★149 rev
Masontops Complete Mason Jar Fermentation Kit - Pickle Kit Sauerkraut Making Kit Kimchi Container - Fermentation Airlock Lids Wide Mouth Mason Jars
Masontops$54.594.8★4,768 rev
JILLMO 1.5L Wide Mouth Glass Fermentation Jar with Airlock & Weight 2 Pack
JILLMO$34.054.5★1,812 rev
Hersolm 64oz/2L Fermentation Jars with Airlocks & Weights 2 Pack
Hersolm$34.414.5★47 rev
32 oz Mason Jar Fermentation Kit 2 Pack Fermentation Jars Fermentation Lids Fermenting Weights and Airlocks Complete Fermenting Kit for Making and Storing SauerkrautPack of 2
Lalvam$20.844.5★173 rev
Newest
by launch date
Ultimate Fermentation Kit to Make Probiotic Vegetables: Sauerkraut Kimchi Pickles w/FREE Digital Guide 3 Fermenting Springs & Venting Lids for Easy Pickling in Wide Mouth Mason Jars (Not Included)
Ultimate$22.0365 rev
Hersolm 4 Pack Fermentation Kit for Wide Mouth Mason Jar (No Jars)
Hersolm$29.3872 rev
Fermenting weights wide mouth Mason Jar Fermentation Kit with 4 Fermentation Lids 4 Glass fermentation Weights 4 Airlocks for Fermenting 5 Silicone Rings & Grommets - Pickling kitNo Jars
ANZHIRUOSU$15.7442 rev
Dobyusf Fermentation Kit for Wide Mouth Mason Jars 4- Complete Pickling & Sauerkraut Set with Glass Weight Stainless Steel Lid Air Lock Valve Silicone Seals (Jar Not Included)
Dobyusf$13.2357 rev
4-Pack Mason Jar Fermentation Kit With Four 32 Oz Jars And Plastic Lids
IceFun$37.29149 rev
Trending
90-day click momentum
Glolaurge 1.8L Wide Mouth Fermentation Jars with Airlocks 2-Pack
Glolaurge$17.444.4★
Qianfenie Upgrade 1 Gallon Fermentation Jar with Airlocks 2 Pack Glass Jar
Qianfenie$44.774.9★
Glolaurge Fermenting Jars 1.5L Fermentation Kit With Glass Weights 2-Pack
Glolaurge$20.364.7★
Ultimate Fermentation Kit to Make Probiotic Vegetables: Sauerkraut Kimchi Pickles w/FREE Digital Guide 3 Fermenting Springs & Venting Lids for Easy Pickling in Wide Mouth Mason Jars (Not Included)
Ultimate$22.034.7★
Hersolm 64oz/2L Fermentation Jars with Airlocks & Weights 2 Pack
Hersolm$34.414.5★
What buyers say about fermentation jar
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality kit”
“easy to carry”
“As described”
“Love the size”
“easy cleanup”
“Reasonably priced”
“Functional and works well”
“it would make a great gift for the cook in your life”
“the seal is strong”
“seems quite durable”
What buyers complain about
“Very large”
“has poor durability”
“Poor quality control”
“The lids leak”
“It's not so easy now”
“I will have to Google better directions because the ones that came with it are not beginner friendly”
“especially for the price”
“it isnt especially thick”
“No grip”
“they break very easy”
Top return reasons
Common questions
- Is fermentation jar profitable to sell on Amazon United States?
- The niche generates $1.1M/yr across 57 tracked products. 16 of 30 products launched in the last 360 days are still selling. 90-day search growth is +11.5%. Flapen's verdict: Launch it (68/100).
- How competitive is the fermentation jar niche?
- 28 brands and 56 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 53% of demand.
- What do buyers complain about in fermentation jar?
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 1.5%.
- When does demand for fermentation jar peak?
- Demand peaks in Jul; the busiest month runs 1.5× the quietest.
- What does it cost to enter the fermentation jar niche?
- Listings span $11.17–$56.67; the average listing price is $29.98 (sweet spot $15–$100). The average incumbent carries 732 reviews — the moat a new listing must climb.