---
title: "Sourdough Starter Jar — $6.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/home-kitchen/sourdough-starter-jar"
last_updated: "2026-08-10T11:00:59.227Z"
locale: en
meta:
description: "Niche score 60/100 · $6.9M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Aug 2026."
"og:description": "Niche score 60/100 · $6.9M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Aug 2026."
"og:title": "Sourdough Starter Jar — $6.9M/yr Amazon US Niche (2026) - Flapen"
---
# **sourdough starter jar**
**Worth a look**
Shows a $6.9M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 99Growth 14Conversion 68Competition 67Returns 76Price range 77Avg price 91Brand share 49Review moat 64Quality gap 21
**Market size**
**Incredible****$6.9M**
$6.9M/yr · 5.3M searches
**Avg price**
**Great****$21.57**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.51–$33.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****2.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Good****6.1%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****45%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Good****941.76**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****75%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-21.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, sourdough starter jar is a $6.9M/yr Amazon United States market (5.3M searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Jan. Verdict: Worth a look — 60/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sourdough starter jar market data**
- **Units sold / yr**
- **250K–300K**
- avg 8,000–10,000/product
- **Revenue / yr**
- **$5.4M–$6.5M**
- units × avg price
- **Conversion rate**
- **6.1%**
- **Avg BSR**
- **#168**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **85%**
- **Out of stock**
- **0.2%**
- **Avg brand age**
- **29 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products take 45% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**21 **▲rising
**Sellers**
**42**
**Top-5 brand share**
**75%**
Top 20: 99%
**Top-5 click share**
**45%**
Top 20: 86%
**Open market**
**21%**
- WECK55% - INOBYO8% - Brod & Taylor5% - Snuvid4% - Farielyn-X3% - KNEADACE3%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -21.5% search growth over the last 90 days.
100K60KSpike '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/home-kitchen/sourdough-starter-jar/trend)
## **Top sourdough starter jar search terms**
- **sourdough starter jar**1.7M/yr-27.2%6.3% conv. - **weck jars**1.5M/yr-13.4%3.0% conv. - **sourdough jar**492K/yr-18.6%5.2% conv. - **weck jars for sourdough**370K/yr-37.0%6.1% conv. - **weck jar**323K/yr-26.7%4.0% conv. - **sour dough starter jars**160K/yr-20.2%5.8% conv. - **weck**120K/yr-3.7%1.9% conv. - **weck jars with lids**99K/yr-9.8%1.8% conv. - **sourdough jars**92K/yr-27.4%4.4% conv. - **starter jar**86K/yr-35.5%6.5% conv. [**All search terms **](https://flapen.com/research/us/home-kitchen/sourdough-starter-jar/search-terms)
## **Top sourdough starter 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.
0%4%$278K8%$555K12%$833K16%$1.1M101001K10K 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**Weck Tulip Jars 1 Liter - Large Sour Dough Starter Jars with Wide Mouth - Suitable for Canning and Storage - 2 with Glass Lids**WECK**$25.17**4.8★3,353 rev](https://www.amazon.com/dp/B08CFWDQX1) [2**WECK 743 Mold Jar (Weck 743)**WECK**$24.47**4.7★3,033 rev](https://www.amazon.com/dp/B08D3YDKT5) [3**INOBYO Sourdough Starter Jar Kit 24 oz Wide Mouth Sour Dough Jars Glass**INOBYO**$9.84**4.5★557 rev](https://www.amazon.com/dp/B0D3922NVQ) [4**WECK Canning Jars 742 Mold Jars made of Transparent Glass - Eco-Friendly Canning Jar - Storage for Food Yogurt with Air Tight Seal and Lid - 1/2 Liter Tall Jar Set - (2 Jars)**WECK**$22.71**4.6★897 rev](https://www.amazon.com/dp/B08DDD6T1R) [5**Weck Tulip Jar - Sour Dough Starter Jars for Sourdough - 1 x WECK 745 Large Clear Jar with Wide Mouth - 1 Liter Includes Glass Lid rubber seal and steel clips**WECK**$18.43**4.8★2,161 rev](https://www.amazon.com/dp/B08P555DGH)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Wide Mouth Canning Jars 27 oz - 2 Pack Sourdough Starter Jars with 4 Lids**Generic**$17.06**101 rev3mo ago](https://www.amazon.com/dp/B0GL8HJSKL) [**Canning Jars 27 oz 2 Pack Sourdough Starter Jars with Glass & Plastic Lids**Freshmage**$19.50**136 rev7mo ago](https://www.amazon.com/dp/B0FWBJK2ND) [**Snuvid 1 L (34 oz) Sourdough Starter Jar Kit Wide Mouth Potbelly Crock - Glass Sour Dough Starter Bread Jar Set - Sourdough Baking Supplies - Sour Dough Bread Accessories Gifts for Sourdough Lovers**Snuvid**$19.30**320 rev7mo ago](https://www.amazon.com/dp/B0G64HWNFQ) [**2 Pack Premium Pro Sourdough Starter Jar Kit - 40oz Large Wide Mouth Sourdough Bread Jar with Marked Feeding Band Thermometer Scraper Cloth Cover & Silicone Lid/Base Glass Container Baking Supply**Farielyn-X**$20.40**326 rev9mo ago](https://www.amazon.com/dp/B0FXVGSFL1) [**WECK Canning Jars 742 Mold Jars made of Transparent Glass - Eco-Friendly Canning Jar - Storage for Food Yogurt with Keep Fresh Lids - 1/2 Liter Tall Jar Set - (2 Jars Keep Fresh Lids)**WECK**$23.51**77 rev1y ago](https://www.amazon.com/dp/B0FHBKBW6C)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Wide Mouth Canning Jars 27 oz - 2 Pack Sourdough Starter Jars with 4 Lids**Generic**$17.06**4.7★**▲ 321%**](https://www.amazon.com/dp/B0GL8HJSKL) [**Canning Jars 27 oz 2 Pack Sourdough Starter Jars with Glass & Plastic Lids**Freshmage**$19.50**4.9★**▲ 128%**](https://www.amazon.com/dp/B0FWBJK2ND) [**Snuvid 1 L (34 oz) Sourdough Starter Jar Kit Wide Mouth Potbelly Crock - Glass Sour Dough Starter Bread Jar Set - Sourdough Baking Supplies - Sour Dough Bread Accessories Gifts for Sourdough Lovers**Snuvid**$19.30**4.8★**▲ 119%**](https://www.amazon.com/dp/B0G64HWNFQ) [**WECK - Sour Dough Starter Jars - Classic Glass Jars for Sourdough with Glass Lid - Tulip Jar with Wide Mouth 1 Liter Includes Cork Lid & Keep Fresh Cover (2 Pack)**WECK**$33.70**4.8★**▲ 99%**](https://www.amazon.com/dp/B09551PJG4) [**2 Pack Premium Pro Sourdough Starter Jar Kit - 40oz Large Wide Mouth Sourdough Bread Jar with Marked Feeding Band Thermometer Scraper Cloth Cover & Silicone Lid/Base Glass Container Baking Supply**Farielyn-X**$20.40**4.8★**▲ 83%**](https://www.amazon.com/dp/B0FXVGSFL1)
**~~View all trending →~~**
## **Common questions**
- **Is sourdough starter jar profitable to sell on Amazon United States?**
- The niche generates $6.9M/yr across 34 tracked products. 8 of 8 products launched in the last 360 days are still selling. 90-day search growth is -21.5%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the sourdough starter jar niche?**
- 21 brands and 42 sellers compete. The top 5 products take 45% of clicks and top 5 brands hold 75% of demand.
- **When does demand for sourdough starter jar peak?**
- Demand peaks in Jan; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the sourdough starter jar niche?**
- Listings span $9.51–$33.89; the average listing price is $21.57 (sweet spot $15–$100). The average incumbent carries 942 reviews — the moat a new listing must climb.
## **Related niches in Home & Kitchen**
- 74 [**graduation centerpieces for tables 2023**](https://flapen.com/research/us/home-kitchen/graduation-centerpieces-for-tables-2023)$368K/yr+228.8%**Worth a look**- 74 [**artificial hanging flowers for outdoors**](https://flapen.com/research/us/home-kitchen/artificial-hanging-flowers-for-outdoors)$1.2M/yr+77.3%**Launch it**- 74 [**5th grade graduation decorations**](https://flapen.com/research/us/home-kitchen/5th-grade-graduation-decorations)$149K/yr+666.7%**Worth a look**- 75 [**4th of july party supplies**](https://flapen.com/research/us/home-kitchen/4th-of-july-party-supplies)$240K/yr>1,000%**Worth a look**- 75 [**desk goose**](https://flapen.com/research/us/home-kitchen/desk-goose)$2.2M/yr+40.7%**Launch it**- 75 [**fall candles**](https://flapen.com/research/us/home-kitchen/fall-candles)$620K/yr+155.9%**Worth a look**[**All Home & Kitchen niches **](https://flapen.com/research/us/home-kitchen)