By the Seovoro Team · Last updated October 27, 2026
Key takeaways
- Track price, stock, shipping and promotions for your top 20 products first.
- Set a floor price before you start. Do not match every drop.
- Check public pages at a gentle rate, and respect each site's terms and robots.txt.
- Treat a competitor's stock-out as an opportunity, not just their price changes.
Online shoppers compare prices fast. If a competitor drops theirs on Monday and you find out on Friday, you have probably lost sales. Monitoring prices automatically removes that delay.
In this guide
- What to track
- Start small
- Three ways to monitor
- How to use the data
- Play fair and stay safe
- Beyond price
- An example of simple price rules
- Handling stock-outs
- What to measure
- FAQ
- Sources
What to track
- Price of your top products, not your whole catalog.
- Stock status (in stock, low stock, sold out). A competitor running out is a chance for you.
- Shipping cost and delivery time. Shoppers compare the total, not just the price.
- Promotions such as bundles and discount codes.
Start small
- Pick your 20 best-selling products.
- For each, find 2 or 3 direct competitors that sell the same item.
- Record the product page links in a sheet.
- Decide how often to check: daily for fast-moving markets, weekly for slower ones.
Three ways to monitor
- By hand: free, but slow, and you will stop doing it after a week.
- Browser alerts: some tools notify you when a page changes. Fine for a handful of links, noisy for more.
- A monitoring bot: reads a list of product pages on a schedule, records price and stock, and exports the history. Our E-commerce Price and Product Monitoring Bot does this, and you can browse more in our monitoring bots.
How to use the data
- Do not match every drop. A race to the bottom ruins your margin. Decide a floor price for each product first.
- Compete on more than price: faster delivery, better returns, bundles, clear product pages.
- Watch for patterns: sales on certain weekends, price rises after stock runs out.
- Use stock-outs: when a competitor sells out, make sure your ads and listings are live.
Play fair and stay safe
- Monitor only public product pages.
- Check pages at a reasonable rate. Do not hit a site hundreds of times a minute.
- Read the site's terms and robots.txt, and respect them.
Beyond price
You can also watch competitor product pages for new products, changed descriptions and new reviews. Pair this with a regular SEO check of your own product pages so your listings are as strong as your pricing.
An example of simple price rules
Suppose you sell a kettle for 49. Your cost is 31, and you want to keep at least a 20 percent margin. Your floor price is then about 39. You decide: if two competitors drop below 45, review the product; if one drops below 39, do not match, and instead highlight faster delivery or a longer guarantee. Rules like this stop you from reacting to every small change.
Handling stock-outs
- When a competitor sells out of a popular product, make sure your listing, your ads and your stock are ready.
- When you are about to sell out yourself, check whether a price rise makes sense instead of discounting.
What to measure
- How often competitors change prices.
- How much they usually change them by.
- Whether changes follow a pattern (end of month, holidays, new product launches).
- Whether your sales change after theirs do.
After a month of data, you will know which competitors to watch closely and which to ignore.
FAQ
How often should I check prices?
Daily for competitive products such as electronics. Weekly is enough for slower categories.
Will this break any rules?
Reading public prices is common practice. Keep the request rate low and follow each site's terms.
Should I always match the lowest price?
No. Set a minimum margin first. Many shoppers pay more for trust, speed and good service.
Sources
- Google Search Central: Introduction to robots.txt
- IETF: RFC 9309: Robots Exclusion Protocol
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Written by Seovoro SEO Team
SEO, AEO & AI Search specialists at Seovoro. View author profile