Skip to content
60

fermentierglas

Worth a look

Shows low returns (0.7%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 56Growth 16Conversion 41Competition 67Returns 96Price range 73Avg price 95Brand share 76Review moat 83Quality gap 57

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Avg price

Incredible€22.86

avg listing price — sweet spot $15–$100

Review moat

Great332.73

avg incumbent reviews — the moat a new listing must climb

Brand share

Great59%

top-5 brand share — no brand owns this niche

Price range

Good€2.54–€49.12

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

Competition

Good45%

top-5 click share — leaders hold, buyers still browse

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Good€414K

€414K/yr · 552K searches

Conversion

Okay3.3%

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

Growth

Bad-18.6%

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

According to Flapen's Amazon Germany niche tracking, fermentierglas is a €414K/yr Amazon Germany market (552K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Nov. Verdict: Worth a look — 60/100.

Data updated Jul 15, 2026 · scored weekly · How we score niches

fermentierglas market data

Units sold / yr
15K–20K
avg 250–500/product
Revenue / yr
€343K–€457K
units × avg price
Conversion rate
3.3%
Avg BSR
#1,079
Page quality
0%
Prime
89%
Sponsored
89%
Out of stock
1.7%
Avg brand age
26 months
Avg seller age
195 days

Competition & brand share

The top 5 products take 45% of clicks — established leaders, but buyers still shop beyond them.

Brands

24 falling

Sellers

62

Top-5 brand share

59%

Top 20: 97%

Top-5 click share

45%

Top 20: 84%

Open market

32%

  • Kilner15%
  • GREEN WISE13%
  • Glolaurge11%
  • HEFTMAN10%
  • SwiftSlot10%
  • Smiths Mason Jars9%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -18.6% search growth over the last 90 days.
15K10KSpike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Nov · busiest ÷ quietest = 1.8×

Top fermentierglas search terms

  • fermentierglas246K/yr
  • fermentation jar with airlock40K/yr
  • fermentiergläser41K/yr
  • fermentationsglas34K/yr
  • gärglas28K/yr
  • fermentierset33K/yr
  • fermentieren starter set21K/yr
  • kimchi glas13K/yr
  • fermentierglas mit gewicht13K/yr
  • fermentation glas11K/yr
All search terms

Top fermentierglas 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%4%€17K8%€33K12%€50K16%€66K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about fermentierglas

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

What buyers love

Qualität insgesamt26%

“Super produkt”

Gesamtgröße9%

“Passt”

Stärke8%

“das Glas robust und”

Geschmack insgesamt7%

“very tasty”

Benutzerfreundlichkeit7%

“so geht easy living”

Einfache Reinigung6%

“Leicht zu reinigen”

beworben Vs Tatsächliches Produkt5%

“Artikel wie bestellt”

Preis-Leistungs-Verhältnis3%

“In Summe: Super Preis-Leistung”

Effizienz3%

“Funktioniert prima und trägt zur gesunden Ernährung bei”

Gewicht leicht2%

“Super Gläser und spitzen Gewichte”

What buyers complain about

Rost/Korrodieren10%

“Alle Deckel sind nach wenigen Monaten Nutzung verrostet”

Haltbarkeit9%

“mir ist bereits bei der ersten Nutzung eins zerbrochen beim runterdrücken.”

Gesamtgröße8%

“Leider Volumen kleiner als angegeben”

Qualität insgesamt6%

“Miserable Qualität und kein Einzelfall”

Preis-Leistungs-Verhältnis5%

“der Preis schmerzt.”

beworben Vs Tatsächliches Produkt4%

“Leider Volumen kleiner als angegeben”

Stärke4%

“Leider ist das Material, glas für die Grösse und Inhalt zu schwach dimensioniert”

Geschmack insgesamt4%

“Hat uns überhaupt nicht geschmeckt”

Dünn3%

“Die Deckel etwas sehr dünn”

Gewicht schwer3%

“Leider sind die Gewichte viel zu klein”

Top return reasons

Gesamtgröße51%
Defekt Material/Teile12%
Funktionalität insgesamt6%
Qualität insgesamt5%
beworben Vs Tatsächliches Produkt3%
Preis-Leistungs-Verhältnis2%
Benutzerfreundlichkeit2%
Produktzustand2%
Geschenk Zweck2%
Anleitung/Benutzerhandbuch/Fehlerbehebung2%

Common questions

Is fermentierglas profitable to sell on Amazon Germany?
The niche generates €414K/yr across 37 tracked products. 2 of 13 products launched in the last 360 days are still selling. 90-day search growth is -18.6%. Flapen's verdict: Worth a look (60/100).
How competitive is the fermentierglas niche?
24 brands and 62 sellers compete. The top 5 products take 45% of clicks and top 5 brands hold 59% of demand.
What do buyers complain about in fermentierglas?
Top complaints mined from reviews: Rost/Korrodieren, Haltbarkeit, Gesamtgröße. The return rate is 0.7%.
When does demand for fermentierglas peak?
Demand peaks in Nov; the busiest month runs 1.8× the quietest.
What does it cost to enter the fermentierglas niche?
Listings span €2.54–€49.12; the average listing price is €22.86 (sweet spot $15–$100). The average incumbent carries 333 reviews — the moat a new listing must climb.