---
title: "Fensterstopper — €158K/yr Amazon DE Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/de/baumarkt/fensterstopper"
last_updated: "2026-08-11T00:28:26.926Z"
locale: en
meta:
description: "Niche score 54/100 · €158K/yr market. Brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · €158K/yr market. Brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fensterstopper — €158K/yr Amazon DE Niche (2026) - Flapen"
---
# **fensterstopper**
**Worth a look**
Shows demand growing +273.7% this quarter, but brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list.
Market size 33Growth 99Conversion 52Competition 43Returns 95Price range 66Avg price 36Brand share 13Review moat 27Quality gap 48
**Growth**
**Incredible****+273.7%**
90-day search growth — must beat 0% to launch
**Returns**
**Incredible****1.0%**
return rate — above 5% kills the launch gate
**Price range**
**Good****€1.85–€40.14**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****4.3%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****59%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Okay****€10.28**
avg listing price — sweet spot $15–$100
**Market size**
**Okay****€158K**
€158K/yr · 361K searches
**Review moat**
**Okay****3,829.67**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Signals**[** Trending**](https://flapen.com/research/niches?market=de&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon Germany niche tracking, fensterstopper is a €158K/yr Amazon Germany market (361K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Worth a look — 54/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fensterstopper market data**
- **Units sold / yr**
- **15K–20K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **€154K–€206K**
- units × avg price
- **Conversion rate**
- **4.3%**
- **Avg BSR**
- **#37**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **89%**
- **Out of stock**
- **0.4%**
- **Avg brand age**
- **39 months**
- **Avg seller age**
- **187 days**
## **Competition & brand share**
The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **▼falling
**Sellers**
**30**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**59%**
Top 20: 100%
**Open market**
**3%**
- Stoppy45% - LouMaxx23% - Vlippy12% - WENKO9% - Homery6% - Quality-Collection2% - Open — no brand owns it (2 brands, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +273.7% search growth over the last 90 days.
50K30KPrime Day '24Holiday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jun, Jul, Aug · busiest ÷ quietest = 7.9×
[**Open Trend **](https://flapen.com/research/de/baumarkt/fensterstopper/trend)
## **Top fensterstopper search terms**
- **fensterstopper**166K/yr+290.4%3.7% conv. - **fensterstopper beim lüften**37K/yr+340.8%3.8% conv. - **fenster stopper**31K/yr+211.0%3.4% conv. - **fenster offenhalter**17K/yr+252.0%3.5% conv. - **fensterkeile**14K/yr+188.3%1.9% conv. - **fensterkeile zum lüften**9K/yr+321.2%3.8% conv. - **fenster aufhalter**9K/yr+217.4%4.2% conv. - **fensterklammer**9K/yr+269.8%4.4% conv. - **stoppy**10K/yr+392.1%4.9% conv. - **fenster stopper wind**6K/yr+402.5%2.9% conv. [**All search terms **](https://flapen.com/research/de/baumarkt/fensterstopper/search-terms)
## **Top fensterstopper 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%10%€16K20%€32K30%€48K40%€63K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 2er Set (erhältlich in 14 Farben) (schwarz)**Stoppy**€9.83**4.6★11,338 rev](https://www.amazon.de/dp/B07C85M56Y) [2**Vlippy Tür- & Fensterstopper 2 Stück | Verhindert das Zuschlagen von Fenstern & Türen endlich Lüften ohne Sorge | Einfache Montage ohne Bohren - einfach kleben vlippen fertig**Vlippy**€12.12**4.3★385 rev](https://www.amazon.de/dp/B0FM76NWZL) [3**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 4er Set (erhältlich in 14 Farben) (schwarz)**Stoppy**€16.21**4.6★6,544 rev](https://www.amazon.de/dp/B07CGR7D8C) [4**LouMaxx Fensterstopper 6er Set Fensterklammer Klemmschutz Fenster Zuverlässige Sicherheit**LouMaxx**€8.69**4.5★1,956 rev](https://www.amazon.de/dp/B08JPTRS9G) [5**WENKO Multi-Stop Mod. Multi-STOP vielseitiger Tür-& Fensterstopper Puffer Türpuffer Keil Fingerschutz für Türen Fenster & Schubladen flexibel anpassbar aus Kunststoff Maße 11 8 x 7 7 x 2 5cm Anthrazit**WENKO**€3.50**4.6★1,866 rev](https://www.amazon.de/dp/B08483GS1Y)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Vlippy Tür- & Fensterstopper 2 Stück | Verhindert das Zuschlagen von Fenstern & Türen endlich Lüften ohne Sorge | Einfache Montage ohne Bohren - einfach kleben vlippen fertig**Vlippy**€12.12**385 rev11mo ago](https://www.amazon.de/dp/B0FM76NWZL) [**6 Stück Klemmschutz Für Türen Kinder Fensterstopper Beim Lüften Türstopper Tür Tür Klemmschutz für Türen Türstopper Kindersicherung Türen**SSHUIKKAI**€4.30**11 rev1y ago](https://www.amazon.de/dp/B0FF1Z4T14) [**LouMaxx Fensterstopper beim Lüften Türkeil Der Allrounder im Bereich Fensterkeile und Türstopper Boden Fenster Stopper Gummi 2er Pack in Schwarz**LouMaxx**€9.05**106 rev1y ago](https://www.amazon.de/dp/B0F6YXWQJK) [**LouMaxx Fensterstopper 2er Set Fensterklammer Klemmschutz Fenster Zuverlässige Sicherheit**LouMaxx**€6.40**34 rev1y ago](https://www.amazon.de/dp/B0F7HJKHV5) [![Fensterstopper [2er Set] Fensterstopper beim Lüften Fensterkeil & Balkontür Stopper Fenster Offenhalter & Fensterfeststeller ohne Bohren für Fenster und Türen](https://m.media-amazon.com/images/I/41DiOZU3T0L.jpg)**Fensterstopper \[2er Set\] Fensterstopper beim Lüften Fensterkeil & Balkontür Stopper Fenster Offenhalter & Fensterfeststeller ohne Bohren für Fenster und Türen**Homery**€8.02**58 rev1y ago](https://www.amazon.de/dp/B0DPHQ2JKC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 2er Set (erhältlich in 14 Farben) (Mint)**Stoppy**€9.97**4.6★**▲ 108%**](https://www.amazon.de/dp/B07C7MM637) [**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 2er Set (erhältlich in 14 Farben) (hellblau)**Stoppy**€9.95**4.6★**▲ 108%**](https://www.amazon.de/dp/B07C81QDV3) [**LouMaxx Fensterstopper 2er Set Fensterklammer Klemmschutz Fenster Zuverlässige Sicherheit**LouMaxx**€6.40**4.2★**▲ 93%**](https://www.amazon.de/dp/B0F7HJKHV5) [**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 2er Set (erhältlich in 14 Farben) (Weiß)**Stoppy**€9.86**4.6★**▲ 63%**](https://www.amazon.de/dp/B07C82F58J) [**Stoppy Stoppi Fensterstopper Türstopper Türkeil Türhaken Fensterklammer 4er Set (erhältlich in 14 Farben) (Weiß)**Stoppy**€16.31**4.6★**▲ 34%**](https://www.amazon.de/dp/B07C81JLX5)
**~~View all trending →~~**
## **What buyers say about fensterstopper**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**beworben Vs Tatsächliches Produkt**13%
*“Tut super was es soll”*
**Benutzerfreundlichkeit**11%
*“Easy”*
**Qualität insgesamt**11%
*“Super Produkt”*
**Preis-Leistungs-Verhältnis**8%
*“waren preiswert”*
**Haltbarkeit**6%
*“Hält sehr gut”*
**Verriegelungsmechanismus**6%
*“Ist ein Tür- und Festerstopper und genau das macht es”*
**Effizienz**6%
*“Funktioniert sehr gut”*
**Stärke**5%
*“Sehr robust”*
**Montage/Installation**4%
*“Einfach Installation - Qualität TOP”*
**Gesamtgröße**4%
*“Fensterstopper [2er Set] passen super”*
### **What buyers complain about **
**Gesamtgröße**17%
*“Passt nicht”*
**Funktionalität insgesamt**14%
*“Funktioniert nicht”*
**Kompatibilität – insgesamt**11%
*“nicht immer kompatibel”*
**Haftung/Klebrigkeit**11%
*“Zuerst einmal ging die Schutzfolie vom Klebestreifen fast gar nicht ab”*
**Haltbarkeit**11%
*“Hält nicht”*
**Verriegelungsmechanismus**5%
*“Klappt nicht”*
**Stärke**3%
*“Hält nur mäßig”*
**Griff**3%
*“Das Ding rutscht einfach mit der Tür mit”*
**Hartes Gefühl**3%
*“Etwas groß und hart”*
**Preis-Leistungs-Verhältnis**2%
*“Geld rausgeschmissen”*
### **Top return reasons **
**Gesamtgröße**39%
**Funktionalität insgesamt**19%
**Kompatibilität – insgesamt**6%
**Mechanismus probleme**5%
**Defekt Material/Teile**5%
**Farbe**3%
**beworben Vs Tatsächliches Produkt**3%
**Haftung/Klebrigkeit**3%
**Haltbarkeit**2%
**Griff**2%
## **Common questions**
- **Is fensterstopper profitable to sell on Amazon Germany?**
- The niche generates €158K/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +273.7%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the fensterstopper niche?**
- 8 brands and 30 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in fensterstopper?**
- Top complaints mined from reviews: Gesamtgröße, Funktionalität insgesamt, Kompatibilität – insgesamt. The return rate is 1.0%.
- **When does demand for fensterstopper peak?**
- Demand peaks in Jun–Jul–Aug; the busiest month runs 7.9× the quietest.
- **What does it cost to enter the fensterstopper niche?**
- Listings span €1.85–€40.14; the average listing price is €10.28 (sweet spot $15–$100). The average incumbent carries 3,830 reviews — the moat a new listing must climb.
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