AmzCompanion — Amazon Stock Checker

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

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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.

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.

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.

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

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.