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.

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

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

Great2.0%

return rate — above 5% kills the launch gate

Conversion

Good6.1%

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

Competition

Good45%

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

Review moat

Good941.76

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay75%

top-5 brand share — brands hold most of the demand

Quality gap

Bad4.7★

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

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

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.

Peak months: Jan · busiest ÷ quietest = 2.0×

Open Trend

Top sourdough starter jar search terms

sourdough starter jar1.7M/yr -27.2%6.3% conv.
weck jars1.5M/yr -13.4%3.0% conv.
sourdough jar492K/yr -18.6%5.2% conv.
weck jars for sourdough370K/yr -37.0%6.1% conv.
weck jar323K/yr -26.7%4.0% conv.
sour dough starter jars160K/yr -20.2%5.8% conv.
weck120K/yr -3.7%1.9% conv.
weck jars with lids99K/yr -9.8%1.8% conv.
sourdough jars92K/yr -27.4%4.4% conv.
starter jar86K/yr -35.5%6.5% conv.

All 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.

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

Weck Tulip Jars 1 Liter - Large Sour Dough Starter Jars with Wide Mouth - Suitable for Canning and Storage - 2 with Glass Lids

WECK$25.174.8★3,353 rev

WECK 743 Mold Jar (Weck 743)

WECK$24.474.7★3,033 rev

INOBYO Sourdough Starter Jar Kit 24 oz Wide Mouth Sour Dough Jars Glass

INOBYO$9.844.5★557 rev

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$22.714.6★897 rev

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$18.434.8★2,161 rev

Newest

by launch date

Wide Mouth Canning Jars 27 oz - 2 Pack Sourdough Starter Jars with 4 Lids

Generic$17.06101 rev

3mo ago

Canning Jars 27 oz 2 Pack Sourdough Starter Jars with Glass & Plastic Lids

Freshmage$19.50136 rev

7mo ago

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$19.30320 rev

7mo ago

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$20.40326 rev

9mo ago

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$23.5177 rev

1y ago

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.