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under sink water filter
Skip itBrand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Market size
Incredible$2.8M$2.8M/yr · 986K searches
Avg price
Good$109.75avg listing price — sweet spot $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+10.5%90-day search growth — must beat 0% to launch
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Conversion
Okay2.6%search→purchase rate — share of searches ending in a sale
Returns
Bad5.1%return rate — above 5% kills the launch gate
Review moat
Bad5,288.72avg incumbent reviews — the moat a new listing must climb
Price range
Bad$34.84–$422.62cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Bad96%top-5 brand share — brand-locked demand