Price Monitoring
Competitor Price Monitoring
Know every competitor price change before it costs you a sale
I build competitor price monitoring for e-commerce sellers: prices, discounts and stock collected from competitor stores and marketplaces on a schedule, matched to your own SKUs, stored as history and pushed to Google Sheets, a database or your pricing tool, with an alert when a price moves or a source stops returning valid data.
Key takeaways
- A one-off price pull is quoted at $250 - $900; a monitored daily pipeline at $1,200 - $4,500 plus a monthly fee.
- The hard part is not collecting prices, it is matching the same product across stores. Matching runs on SKU, GTIN or model number first and title second.
- A failed scrape is flagged as failed. A missing value never silently becomes $0 or "out of stock".
- Where a platform offers an official API or feed, it is used first; where a site's terms rule collection out, you hear that before any work starts.
What I build
- Scheduled collection of price, sale price, stock and shipping from competitor stores and marketplaces
- Product matching to your own catalog by SKU, GTIN, model number and title
- Price history kept per product, not overwritten each day
- Alerts when a competitor price moves past a threshold you set
- Failure detection: a source that breaks or returns partial data raises an alert
- Delivery to Google Sheets, a database, a dashboard or your repricing tool
- Source code, deployment and documentation handed over, so you are not locked in
What it costs
Web scraping - one-off pull
$250 - $900
2 - 5 days
One source, cleaned and delivered as CSV or Sheets
Web scraping - monitored pipeline
$1,200 - $4,500 + monthly
2 - 4 weeks
Several sources, scheduled runs, alerting, maintenance
Ranges exclude VAT and third-party costs. Every project gets a fixed quote after a scoping call. All pricing · The full guide
Projects I built
KSP.co.il Full Catalog Scraper
curl_cffi + browser-impersonation scraper that dumps the full Israeli KSP catalog to JSON + Excel-friendly CSV.
Dell Guest Checkout Automation
End-to-end Dell.com add-to-cart + guest checkout automation with anti-bot humanization and failure artifacts.
Multi-Country Real Estate & Cars Scraper
8 scrapers across 4 countries (Chile, Mexico, Puerto Rico, Spain) feeding two unified JSON schemas.
How it works
A short scoping call
What hurts today, what you already use, and what "done" looks like.
A written fixed-price quote
Scope, price and timeline in writing, approved before any work starts.
Built in stages, on your real data
You see a working first version early, not a demo at the end.
Handover with documentation and monitoring
You own the code and the data, and a support window follows launch.
Working with me from the US or Europe
- Most of my client work is for companies in the US, UK, Germany, the Netherlands and Australia.
- Calls are in English and scheduled in your time zone. My working day covers most of the European one and the US East Coast morning.
- A fixed price in US dollars, agreed in writing before any work starts.
- Pay me directly, or hire me through Upwork if you prefer to work through a platform.
- You own the code and the data, with documentation and a support window after launch.
Guides on this
Practical guides from real client work.
Competitor Price Monitoring for E-commerce (Web Scraping Guide)
How online stores use web scraping to track competitor prices, stock, and promotions automatically - what you can monitor, how it works, DIY tools vs a custom setup, whether it is allowed, and what it costs.
Amazon Marketplace Monitoring for Sellers: Building an Alert System That Works
Checking your listings manually catches problems days late. This is how to build monitoring that tells you within the hour when you lose the Buy Box, a hijacker appears, your listing content is altered, or a competitor undercuts you.
Marketplace Monitoring for Amazon & Online Sellers
How online sellers track marketplace listings, prices, Buy Box, ranking and stock automatically - what to monitor, the compliant route, and what it costs.
Scraping Google Shopping for Price Comparison
Pull product offers and prices from Google Shopping across sellers into one comparison dataset - for repricing, market research, or a comparison feature. The compliant route and cost.
How to Build a Price-Comparison Website
A comparison site is a scraping pipeline with a nice front-end: collect offers from many sources, normalize them, and present the best. What it takes to build one and keep it running.
How to Scrape Websites Without Getting Blocked: A Practical 2026 Guide
A practical 2026 developer's guide to scrape websites without getting blocked: proxies, rate limits, TLS fingerprints, Playwright stealth, Cloudflare and silent-block monitoring.
Web Scraping vs API: Which Should Your Business Use?
A practical decision guide to web scraping vs API: when an official API is enough, when scraping is the only option, and the cost and legal trade-offs.
In-House vs Hiring a Freelancer to Build a Web Scraper: The Real Cost
The build vs buy web scraper decision is rarely about the first run. I break down the real cost of in-house, SaaS, and hiring a freelancer.
How Much Does Web Scraping Cost? (2026 Price Guide)
What web scraping actually costs in 2026: one-off projects ($250-$1,000), ongoing monitoring retainers ($150-$800+/mo), what drives the price up, DIY tools vs a developer, and the ongoing costs most quotes hide.
Frequently asked questions
Which stores and marketplaces can you monitor?
Most public online stores, including Shopify and WooCommerce stores, custom storefronts, and marketplaces. JavaScript-heavy sites are handled with a real browser (Playwright). Before quoting I check each source for an official API or feed and for terms that rule collection out, and tell you which sources are in and which are not.
How do you match my products to a competitor's listing?
By identifiers first - SKU, GTIN/EAN/UPC or manufacturer model number - and by normalized title and attributes when a store does not publish an identifier. Matches that are not certain are flagged for you to confirm once, and the confirmation is remembered.
How often does it run?
Daily is the usual schedule; several times a day is possible for a smaller product set. The frequency is agreed per source so the target site is not overloaded.
What does competitor price monitoring cost?
A one-off pull is quoted at $250 - $900, and a monitored daily pipeline at $1,200 - $4,500 plus a monthly fee that covers hosting and fixing a source when its layout changes. The number of sources, how dynamic they are and how many products you track set the price. You get a fixed quote after a short scoping call.
Why not use an off-the-shelf price tracking tool?
Often you should, and I will say so on the call. A custom pipeline earns its cost when the tools do not cover your competitors, cannot match your catalog reliably, or charge per product at a volume where owning the pipeline is cheaper.
Sources
Official documentation you can verify the claims on this page against.
Let us scope your project
Tell me what you need and I will give you an honest scope, price, and timeline.