rainbow
Skip itA small market ($26K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Brand share
Great48%top-5 brand share — no brand owns this niche
Competition
Great38%top-5 click share — an open shelf
Review moat
Good888.37avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Conversion
Okay2.0%search→purchase rate — share of searches ending in a sale
Avg price
Bad£8.67avg listing price — sweet spot $15–$100
Growth
Bad-20.6%90-day search growth — must beat 0% to launch
Price range
Bad£0.64–£17.26cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad£26K£26K/yr · 148K searches
According to Flapen's Amazon United Kingdom niche tracking, rainbow is a £26K/yr Amazon United Kingdom market (148K searches/yr). The top 5 brands hold 48% of demand. Demand peaks in Dec. Verdict: Skip it — 45/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
rainbow market data
- Units sold / yr
- 3K–4K
- avg 100–250/product
- Revenue / yr
- £26K–£35K
- units × avg price
- Conversion rate
- 2.0%
- Avg BSR
- #424
- Page quality
- 0%
- Prime
- 98%
- Sponsored
- 86%
- Out of stock
- 4.8%
- Avg brand age
- 35 months
- Avg seller age
- 180 days
Competition & brand share
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.Brands
37 falling
Sellers
91
Top-5 brand share
48%
Top 20: 85%
Top-5 click share
38%
Top 20: 72%
Open market
49%
- ZIMPLI28%
- AURORA6%
- Sahunfri6%
- mtuihfo5%
- Elfinbay4%
- Kiuiom3%
Demand & seasonality
Weekly Amazon search volume, last 82 weeks — -20.6% search growth over the last 90 days.Peak months: Dec · busiest ÷ quietest = 2.1×
Top rainbow search terms
- rainbow110K/yr
- rainbow gifts17K/yr
- rainbow bath bombs for kids8K/yr
- rainbows6K/yr
- rainbow bath bomb8K/yr
Top rainbow 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ZIMPLI - Large Cloud Rainbow Baff Bombz Create a Rainbow Effect fizzing bathtime Adventure Bath Bomb Fizzing Fun for Children 4 5 6 7 8 9
ZIMPLI£3.344.5★1,229 rev
ZIMPLI - 3 x Large Cloud Rainbow Baff Bombz Create a Rainbow Effect fizzing bathtime Adventure Bubble Bath Bomb Fizzers Xmas Gift for Kids
ZIMPLI£7.424.5★1,622 rev
Aurora 33577 Palm Pals Vivi Rainbow 5In Soft Toy Pink Purple Yellow
AURORA£6.544.6★489 rev
3 Pairs Rainbow Socks Pride Striped Calf Socks Breathable Casual Fashion Colourful LGBTQ Accessories for Women Girls Men Gifts
mtuihfo£4.984.4★41 rev
Sahunfri 4 Pairs Rainbow Socks Unisex Comfortable Pride Socks with Reinforced Heel Pride Gift for Men Women Celebration Support Casual Wear (UK Alpha One Size Regular Regular 2 Balck+2 White)
Sahunfri£6.914.8★32 rev
Newest
by launch date
Rainbow Dumpling Squishy Big Mystery Dumplings Squishies Box Cute Bao Bun Fidget Real Office Desk Decor Soft Sensory Squeeze Ball with Steamer for Anxiety Stress Relief Surprise Gift (Rainbow)
nnOuOnn£8.3636 rev
KAKU NANU Girls Pyjamas Set Kids Childrens Pjs Girls Gifts Pink Rainbow 3 4 Years
KAKU NANU£11.2918 rev
3 Pairs Rainbow Socks Pride Striped Calf Socks Breathable Casual Fashion Colourful LGBTQ Accessories for Women Girls Men Gifts
mtuihfo£4.9841 rev
Sahunfri 4 Pairs Rainbow Socks Unisex Comfortable Pride Socks with Reinforced Heel Pride Gift for Men Women Celebration Support Casual Wear (UK Alpha One Size Regular Regular 2 Balck+2 White)
Sahunfri£6.9132 rev
Elfinbay Cloud Rainbow Bath Bombs for Girls 2 Large Handmade Bath Bombs for Kids Bubble Bath Safe Kid Bath Bomb Creates Multi-Colour Special Effect Birthday Gifts for Women Kids Stocking Fillers
Elfinbay£7.38715 rev
Trending
90-day click momentumRainbow Dumpling Squishy Big Mystery Dumplings Squishies Box Cute Bao Bun Fidget Real Office Desk Decor Soft Sensory Squeeze Ball with Steamer for Anxiety Stress Relief Surprise Gift (Rainbow)
nnOuOnn£8.362.5★
Ceruwum Unicorn Hoodies for Girls Unicorn Hooded Sweatshirt Oversized Hoodie Blanket for Kids (Light Rainbow 10-11 Years)
Ceruwum£15.864.7★
Marchare Girls Seamless Crew Cotton Socks Kids Casual Socks School Socks Rainbow Stripes Color A 5 Pack 6-8 Years
Marchare£13.414.5★
JOYIN Rainbow Beach Balls(12 Pack) 12/30 cm Inflatable Swimming Pool Toys for Summer Water Games Kids Birthday Party Supplies Combo Set Include Inflatable Beach Balls
JOYIN£7.864.4★
Piefry Unicorn Dressing Gown for Girls - Soft Hooded Robe Sleepwear With Slippers Gifts for Girls (Rainbow Stars 10-11 Years)
Piefry£17.264.6★
What buyers say about rainbow
What buyers praise and complain about, mined from review topics.What buyers love
“Looks like it is beautifully made”
“Good bye for the money, smells lovely, present for granddaughter She loves them”
“Vibrant colours”
“Fun gift”
“Good value”
“Good fun”
“As described”
“Great size”
“Kind and gentle to skin”
“are very strong”
What buyers complain about
“Colour rubs off”
“just not the right size for what we were wanting it for”
“very deceiving video”
“Build quality is basic”
“just fell apart”
“didn't work very well - expected it to fizz around to make the rainbow line”
“Theyre expensive”
“Smell is not strong at all as others have described”
“In reality, once the unicorn has hatched out, and you have kept it in the water to grow, once you take it out it shrinks back down”
“The string came out the holes within 24 hours”
Top return reasons
Common questions
- Is rainbow profitable to sell on Amazon United Kingdom?
- The niche generates £26K/yr across 49 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is -20.6%. Flapen's verdict: Skip it (45/100).
- How competitive is the rainbow niche?
- 37 brands and 91 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 48% of demand.
- What do buyers complain about in rainbow?
- Top complaints mined from reviews: Color, Size-Overall, Advertised Vs Actual Product. The return rate is 0.3%.
- When does demand for rainbow peak?
- Demand peaks in Dec; the busiest month runs 2.1× the quietest.
- What does it cost to enter the rainbow niche?
- Listings span £0.64–£17.26; the average listing price is £8.67 (sweet spot $15–$100). The average incumbent carries 888 reviews — the moat a new listing must climb.