AmzCompanion — Amazon Stock Checker by AmzCompanion

See every Amazon seller's stock, FBA/FBM split, and price on any product page. 14-day trial — no credit card.

Some features may require payment

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About this extension

Know who you're really competing with — without leaving the Amazon listing.

AmzCompanion is a Chrome extension for Amazon sellers who need to size up competition before they source, price, or list. It overlays live seller and inventory intelligence directly on any Amazon product page — so you get the answer in 2 seconds instead of 20 minutes of manual checking.

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WHAT YOU SEE ON EVERY LISTING

Every seller on the ASIN, with their estimated stock count
FBA vs FBM vs Amazon-direct split (both as counts and percentages)
Price, condition, Prime eligibility, and delivery estimate per seller
Filters for price range, seller type, condition, and stock
The total number of offers counted and the real-stock total

No CSV uploads. No dashboards. No pasting ASINs into a research tool. It's just there, on the page you're already looking at.

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WHAT SELLERS USE IT FOR

Arbitrage & wholesale sellers — Spot low-stock competitors before they restock, so you can time your listing entry to capture the buy box.
Private-label sellers — Check whether any third-party sellers have piggybacked your listing and how much inventory they actually hold.
Agencies & VAs — Screen dozens of source-lead ASINs in the time it used to take to check one.
Anyone doing product research — Answer "is this listing worth entering?" from the seller distribution alone.

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WHY IT'S DIFFERENT

Most Amazon seller tools (Jungle Scout, Helium 10, Keepa) pull you into a separate dashboard and ask you to paste in ASINs or upload files. AmzCompanion runs inline, on the product page itself — because that's where you already are when you're making a sourcing or pricing call.

It's a focused tool that does one thing well. Not a suite. Not a subscription you'll only use 10% of.

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TRIAL & PRICING

Free to install.
14-day trial of all features — no credit card required.
Paid plans from US$12/month. Solo (1 seat), Plus (2 seats), Scale (5 seats).
Cancel anytime.

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WORKS ON

Every Amazon marketplace worldwide — including amazon.com, .co.uk, .com.au, .ca, .de, .fr, .it, .es, .co.jp, .in, .com.mx, .com.br, .nl, .sg, .ae, .sa, .se, .pl, and .com.tr.
Any Amazon product listing page with visible offer data.

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PRIVACY

AmzCompanion only reads the information on Amazon product pages it needs to calculate inventory insights. It does not:

Read your Amazon Seller Central data
Read any personal email, documents, or non-Amazon browsing
Sell or share your personal information
Track you across other sites

If you have an active subscription, the extension contacts our servers to verify your license status. That's it.

Full privacy policy: https://amzcompanion.com/privacy

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SUPPORT

Questions, feature requests, or bugs — open the extension, click Help → Contact support. Or email support@amzcompanion.com.

Built by Amazon sellers, for Amazon sellers.

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Permissions and data

Required permissions:

Access your data for www.amazon.ae
Access your data for www.amazon.com
Access your data for www.amazon.co.uk
Access your data for www.amazon.es
Access your data for www.amazon.nl
Access your data for www.amazon.mx
Access your data for www.amazon.it
Access your data for www.amazon.in
Access your data for www.amazon.de
Access your data for www.amazon.fr
Access your data for www.amazon.cn
Access your data for www.amazon.ca
Access your data for www.amazon.com.au
Access your data for www.amazon.com.br
Access your data for www.amazon.com.mx
Access your data for www.amazon.com.tr
Access your data for www.amazon.co.jp
Access your data for www.amazon.pl
Access your data for www.amazon.sa
Access your data for www.amazon.se
Access your data for www.amazon.sg

Optional permissions:

Access your data for api.amzcompanion.com
Access your data for www.amazon.ae
Access your data for www.amazon.com
Access your data for www.amazon.co.uk
Access your data for www.amazon.es
Access your data for www.amazon.nl
Access your data for www.amazon.mx
Access your data for www.amazon.it
Access your data for www.amazon.in
Access your data for www.amazon.de
Access your data for www.amazon.fr
Access your data for www.amazon.cn
Access your data for www.amazon.ca
Access your data for www.amazon.com.au
Access your data for www.amazon.com.br
Access your data for www.amazon.com.mx
Access your data for www.amazon.com.tr
Access your data for www.amazon.co.jp
Access your data for www.amazon.pl
Access your data for www.amazon.sa
Access your data for www.amazon.se
Access your data for www.amazon.sg

Required data collection, according to the developer:

Authentication information
Website activity
Website content

Optional data collection, according to the developer:

Personally identifying information
Technical and interaction data