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// Proprietary venture · PanicWorkz Network

MarketzAmazon Competitor Price Tracking & Sales Data

Competitor price tracking and sales intelligence for Amazon US and eBay US sellers: who cut prices, what sells and how much, whose stock ran out, all in one place. It works in the same space as Helium 10, Jungle Scout and Keepa. Work on Walmart and other marketplaces is under way; local markets are planned.

e-commercedata
Marketz app dashboard
marketz.workz.pw · sign-in required · screenshot: October 2026

Who is Marketz for?

  • Brands and sellers on Amazon and eBay
  • E-commerce teams that price against competitors
  • Founders looking for new products and categories
  • E-commerce agencies building market reports for clients

What you can do with Marketz

Never miss a competitor price move

Price drops and increases, rating changes and stock movements collect in your watchlist as signals. When a competitor cuts prices or runs out of stock, you see it instead of guessing.

Know what each product really sells

Each product's sales badge is combined with its current price to estimate monthly sales value. You see at a glance which brands and sellers take what share of the market.

Act at the right time with price history

Per-product price history reveals a competitor's discount cycle and price floor, so you time campaigns on data rather than hunches.

Spot opportunities early

Market discovery ranks brands and sellers by sales value, and the arbitrage tool surfaces price gaps on the same product. You pick categories with numbers, not instinct.

Compare products side by side

The compare tool puts price, rating and sales data in one table, so you know exactly where your product stands.

One source of truth for the team

Everyone works from the same data: the watchlist, signals and reports are shared. Spreadsheets and manual checks disappear.

How Marketz works

  1. Add products and competitors

    Define the products, brands and sellers you want to watch.

  2. Automatic crawling starts

    A scheduler crawls product pages at regular intervals, recording price, rating, stock and sales badges.

  3. Data gets enriched

    Background workers compute sales-value estimates, price history and brand and seller rankings.

  4. Signals come to you

    Every meaningful change lands in your watchlist as a signal; you only take action.

How it compares

FeatureMarketzHelium 10Jungle ScoutKeepa
Price, stock and sales tracking on Amazon US✓✓✓✓
eBay US tracking✓✗✗✗
Finding price gaps (arbitrage) between Amazon and eBay✓✗✗✗
WalmartIn progress✓✗✗
Amazon marketplaces in other countriesPlanned✓✓✓
Keyword and ad (PPC) tools✗✓✓✗
Browser extension✗✓✓✓
No setup, sign up and start✓✓✓✓

Competitor details are based on each product's public information as of October 2026 and may have changed. ✓ yes, ✗ no.

About the project

Marketz is a data product that PanicWorkz builds and runs itself. Thousands of products are crawled on a schedule, separate workers enrich sales and product data, and a scheduler keeps everything current.

The solution has four areas: workspace (overview, product search, watchlist, market discovery), tracking (price history, portfolio explorer), intelligence (price intelligence, sales analytics) and tools (product compare, arbitrage).

STACKNext.js UI, API and background workers (instant, enrichment, scheduler), Supabase (PostgreSQL, GoTrue, Kong), Docker

Start tracking your competitors on Amazon and eBay

No setup needed: you sign up, search for products and add them to your watchlist, and price, stock and sales signals start coming in. Let's see how your team would use it in a 30-minute call.

Book a 30-minute call ↗Send a message →See it live ↗

Frequently asked questions

How can I track my competitors' prices on Amazon?

Competitor product pages are crawled on a schedule and their price, stock and rating history is stored. Marketz does this automatically and drops a signal into your watchlist when a competitor cuts prices or runs out of stock.

How do you estimate sales on Amazon?

Amazon shows a sales badge on product pages ("X+ bought in past month"). Combined with the current price it gives an estimate of monthly sales value, which Marketz aggregates by product, brand and seller.

What does Amazon arbitrage software do?

It finds profit opportunities where the same product sells at different prices across sellers or channels. Marketz's arbitrage tool highlights these price gaps among tracked products.

Which marketplaces does Marketz cover?

It currently covers Amazon US (amazon.com) and eBay US. Work on Walmart and other marketplaces is under way, and localization for markets such as Türkiye is planned. Everything Marketz shows is based on real data gathered by tracking products on these marketplaces.

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