Shelves of Babel
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SHARE OF SHELF FOR AMAZON

Amazon is the shelf.
Do you know your share of it?

Shelves of Babel measures market share where buying actually happens: the search results page. Define your shelf from the keywords that matter, and watch who owns it, every single day.

Start free · first data tonightBrowse the live demo
14-day trial · no credit card · no Amazon account connection required
protein powder · share of shelf · live view, widths are weighted share of search results
Jun 30
★ Optimum Nutrition
13.4
Dymatize
9.5
Premier
8.5
Orgain
6.3
MuscleTech
7.1
Body F.
5.1
Ghost
4.2
Vega
4.3
Long tail · 44 brands
34.6
★ = your brand · every brand resolved from raw search results, deduplicated and canonicalized automatically
LIVE DEMO
Browse a real account
For the next few minutes, you’re Aplenty, a snack brand tracking three shelves. Click anything: switch shelves, flip lenses, investigate a competitor. It all works.
app.shelvesofbabel.com · demo account
Make it yours. Start free
THE PART YOU CAN’T SEE
Right now, you’re a bar on someone else’s chart.
Every day, your position on the shelf shifts: a competitor cuts price, flips to 4.5 stars, takes the Best Seller badge. The share moves weeks before the sales report shows it.
Most brands find out in the quarterly review. By then the shelf has already been re-divided.
your shelf · 6 weeks ago
#2
11.2%
#3
▲ price cut + badge, 5 wks ago
9.8%
#4
← you, quietly passed
8.4%
With a shelf tracked, this is a Tuesday-morning alert, not a quarterly surprise.
HOW IT WORKS
Three steps to a market you can actually see
01
Define your shelf
A shelf is any set of keywords: "protein powder" + "whey protein" is a market. Pick keywords from our network map, or type your own.
02
We collect it daily
Every keyword, scraped every day. Every product resolved to a brand: positions, prices, ratings, badges, sponsored placements.
03
Watch share move
Share of shelf by brand, trends, movers, new entrants, price plays, review threats, and who to investigate when the numbers shift.
INFINITE SHELVES
A long tail of selection warrants a long tail of shelves
A category number only means something if you compete across the whole category. Most brands don’t. You have a niche product, or a few SKUs in a corner of a huge category, so “share of Sports Nutrition” is mostly brands you’ll never line up against.
Cut the shelf down to where you actually show up: plant protein powder and its real neighbors. Build a shelf per pocket of selection you play in, track the broad market alongside it, and regroup any time. The data follows.
Brands and agencies alike: track any shelf. Yours, a client’s, or one you’re about to enter.
Shelf: Protein Powder · the broad market
your share: 14.2% · rank #1 of 54
Shelf: Plant Protein · same data, your niche
your share: 8.7% · rank #3 of 47 · a different fight
EVERY LENS ON ONE SHELF
One shelf, eight ways to read it
▦
Share of Shelf
The headline number: weighted share by brand, trend, movers, new entrants.
▤
Rank Grid
Every ASIN’s daily rank on every keyword, color-banded.
$
Prices
Price vs. share, tiers, and promo detection across the shelf.
★
Reviews
Quality quadrant: fortresses, emerging threats, vulnerable incumbents.
◨
Creative
Main-image archetypes and your listing quality vs. the winners.
SEO
Title terms the winners use that you don’t.
⬡
Keyword Network
See how keywords cluster by shared results. Lasso a cluster, make a shelf.
≡
Reports
A monthly narrative of the shelf: share, threats, prices, demand.
MORNING CHECK-IN
The 6 AM scrape, in your pocket
Every shelf, every morning: share, movers, and who to watch, over coffee. Building and deep analysis stay on desktop; your phone is for knowing the number moved before anyone else does.
PRICING
Priced like a utility. Because it is one.
Launch
$19/mo
for founders with their first products
✓25 tracked keywords · typically 2–3 shelves
✓Unlimited shelves, regrouped any time
✓Daily collection · all eight lenses
✓Organic, sponsored & total share views
Start free trial
MOST POPULAR
Brand
$49/mo
for brands & agencies tracking whole markets
✓100 tracked keywords · a full market map
✓Everything in Launch
✓Monthly shelf reports & watch alerts
✓Keyword network & compare-shelves views
Start free trial
⚡
Launching something? Boost any shelf to hourly collection for $15/mo. Watch ranks move in real time, turn it off when the dust settles.
14-day free trial on both plans · no credit card · cancel anytime
Questions
How is "share of shelf" calculated?
−
We scrape your shelf’s keywords daily, attribute a weighted share to each search position (you choose the weighting curve), resolve every product to a canonical brand, and sum by brand. Organic and sponsored placements are tracked separately; view either, or both.
Do I need to connect my Amazon account?
+
Can I track competitors or markets I don’t sell in?
+
How fresh is the data?
+
What’s with the name?
+
Your shelf is moving right now.
Set it up in two minutes. First numbers tonight.
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