Price monitoring: watch competitor prices to decide fast
Price monitoring means continuously tracking your competitors' prices across your sales channels, marketplaces and comparison engines like Google Shopping. It turns scattered prices into usable data: where you stand, when to react, and what price keeps you competitive without giving up your margin.
A seller running 12,000 references across Amazon, Cdiscount, Fnac and Google Shopping cannot check competitor prices by hand. By the time the spreadsheet is done, half the prices have already moved. Alberto Cavallo's work (NBER, 2018) backs this up: under online competition, the average life of a retail price fell from about 6.7 months to 3.65 months between 2008 and 2017. Prices now change nearly twice as fast as before.
That is where price monitoring starts: stop guessing who is undercutting you, and see it. This guide covers what monitoring actually watches, how the technology works, how it feeds repricing, and where to strike the balance between competitiveness and margin. The goal is not the lowest price. It is to decide fast, with real data.
What is price monitoring?
Price monitoring is the continuous surveillance of the prices your competitors charge for the same products as you, channel by channel. In French it is called veille tarifaire. It answers three simple questions: who sells the same product, at what price, and where your offer sits in that distribution.
It differs from two related practices. Competitive intelligence watches a competitor's whole activity, not just prices. Market watch follows a category's trends. Price monitoring is the most operational of the three: it focuses on one data point, the price, and leads to one precise decision, yours. It answers a now-common buying reflex: according to FEVAD (Chiffres cles du e-commerce 2025), 85% of shoppers say they use online tools to compare prices before buying.
How price monitoring works
A price monitoring tool starts from your catalog. You connect it through a feed (a sales-channel connection, a CSV file, a URL or FTP), then the tool looks up, for each reference, the matching offers at your competitors. That is the matching step, the trickiest one: with no EAN, on complex products, only matching by title, image and attributes ties the right offer to the right listing.
Once products are paired, the tool checks prices at a frequency you choose. Not every reference needs the same cadence: a hotly contested product is watched several times a day, a stable one once a day is enough. In practice, that frequency is allocated through a credit system, to concentrate monitoring where it counts, across more than 250 marketplaces and comparison engines like Amazon, Cdiscount or Google Shopping.
What monitoring reveals is your position in the price distribution: the lowest, the median, the highest, and the gap between you and the Buy Box.
Monitoring places your offer within the spread of competitor prices. The decision stays yours: chase the Buy Box, hold the margin, or raise where you are alone.
What to watch: prices, competitors and the market
Price is only an entry point. Useful monitoring also surfaces your offer's rank (first, fifth, tenth), the number of sellers on each marketplace, and how prices move over time. These signals tell you whether a market is contested, thinning out, or whether a competitor is clearing stock.
The number of sellers changes everything. A reference study (Baye, Morgan and Scholten, Journal of Industrial Economics, 2004) measured, on a comparison site, that the gap between the two lowest prices falls from 23% with two merchants to 3.5% with seventeen. The more sellers a product has, the tighter the pricing room and the margin become: monitoring is what spots these situations before you set a price.
One case matters for private labels and manufacturers. When you are the only seller of your reference, classic price monitoring finds nothing. Similar-product matching then identifies equivalents from other brands, and finally gives competitive context to a catalog that had none. A maker of organic private-label cosmetics went from zero data to automated tracking, with price changes visible within the day rather than after hours of manual searching.
From monitoring to repricing: watching is not enough
Watching does not change a price. Price monitoring is only worth it when it feeds a decision: that is what repricing does. From the prices it collects, your position and your costs, a repricing engine proposes a new price within the rules you set.
The system monitors, matches offers and proposes; the operator sets the rules and validates. Monitoring feeds the decision, it does not take it for you.
The principle to keep: the system monitors, matches offers and proposes; you set the rules and you validate. Monitoring does not decide for you, and a good tool never drops below the price floor you defined. Repricing does not mean matching the cheapest, either: a study presented at the WWW 2016 conference (Chen, Mislove and Wilson) identified more than 500 Amazon sellers using algorithmic repricing and showed they win the Buy Box more often without always showing the lowest price. One high-tech seller with a thousand references let automatic repricing apply its rules to the 70% of stable products, to concentrate fast repricing on the 30% that actually fight for the Buy Box. Reaction time dropped from several hours to a few minutes.
At catalog scale, the money adds up. According to McKinsey (2017), well-designed dynamic pricing brings a retailer 2 to 5% sales growth and 5 to 10% margin improvement. These are market-level figures, not a promise. They show that price, managed well, moves margin by whole points.
Manual watch, monitoring tool or automated repricing
Three maturity levels coexist. The manual check, the monitoring tool that collects prices for you, and repricing that goes all the way to adjusting the price. The right level depends on your catalog and your channels.
| Criterion | Manual watch | Price monitoring tool | Automated repricing |
|---|---|---|---|
| Coverage | A few competitors tracked by hand | 250+ marketplaces and comparison engines | Same sources, price adjusted at the end |
| Frequency | Occasional, quickly outdated | Scheduled, up to several times a day | Continuous, near real time |
| Product matching | Manual, error-prone | AI-automated, even without EAN | Automated, costs included |
| Operator effort | High, unsustainable past a few hundred references | Low: you read, you decide | Low: you set the rules, the system applies them |
| Pricing decision | You, by hand | You, informed by the data | The system proposes, you validate and bound |
| Margin protection | No guarantee | Visible, not automatic | Price floor applied to every adjustment |
| For whom | Very small catalog, one or two channels | Mid-size catalog, several channels | Large multichannel catalog, strong competition |
No level is better in absolute terms. A fifty-reference catalog on one store is watched by hand; twelve thousand references across five marketplaces can no longer be run without automation.
Competitiveness and margin: the Google Shopping case
On Google Shopping and comparison engines, price is a visibility factor as much as a conversion one. Google says so in its own documentation: the Merchant Center benchmark price is the average price that typically leads to better auctions, impressions, clicks or conversions. Cutting to be seen erodes the margin; staying too expensive drives clicks away. Price monitoring is what finds that balance, product by product, rather than blindly across the whole catalog.
Two mechanisms stand out from client cases. First, the share of the catalog with no competitor: at one garden specialist, 45.4% of references had no direct competitor. On those products, raising the price where the market allows lifts profitability without losing sales, and steering ads toward already well-positioned references lifted clicks by 34%. Second, the real margin. One home-equipment retailer made each of its ten marketplaces individually profitable by folding in every cost (commissions, logistics, returns, customer service) and setting a minimum margin floor on each sale. myMarket monitoring and myPricing margin protection answer both needs.
Choosing your pricing strategy from monitoring
Monitoring feeds a pricing policy, it does not replace it. Two broad approaches structure most online pricing strategies. The reference strategy starts from the market: you position yourself against a competitor price, with a chosen offset. The cost strategy starts from your margin. You set a profitability floor and ceiling, and the price settles inside.
Most sellers combine the two, reference by default and cost as a guardrail, with rules per product or per collection. A market data point sometimes changes the whole equation: one parapharmacy used its inverted pricing reports, which work back from the market selling price to the target purchase price, to renegotiate its supplier terms. Its online share of revenue, which stood at 5 to 10% of the total, reached 50%. The detail is in this parapharmacy's story.
Price monitoring and the law: what is allowed
Collecting the public prices your competitors display is legal. In France, prices are set freely by competition (article L410-2 of the commercial code), and observing a public price deprives no one of anything. Price monitoring does nothing else: it reads information already available to any buyer.
Two limits are worth knowing. First, the data must be collected fairly, respecting sites' terms of use and without disrupting their operation. Second, monitoring must never serve to agree on prices with competitors: cartels are prohibited (article L420-1 of the commercial code). Watching the market to decide your own price alone is allowed; coordinating with other sellers is not. A professional tool that collects public prices stays on the right side of that line.
Setting up price monitoring: the method
Price monitoring is set up in five steps.
- Connect your catalog. Import your references through a channel connection, a file or a URL, with your costs if you want to steer margin.
- Check the matching. Make sure products are properly paired, especially without an EAN. One motorcycle-parts seller reached 99% accuracy across 200,000 references by adding matching instructions for its niche attributes.
- Set the frequency. Give high-frequency monitoring to contested products, leave stable ones on a low cadence.
- Set your rules. Define the strategy (reference or cost), the price floor and the bounds, channel by channel.
- Decide and measure. Read the position, adjust or let the system propose, then track the effect on your sales and your margin.
This is the logic of myMarket competitive intelligence and myPricing repricing: monitoring informs, the operator decides. To see how price steering supports advertising, look at this garden retailer's case.
In short
Price monitoring continuously tracks your competitors' prices to place your offer and decide fast. It rests on good product matching, a monitoring frequency that fits, and an honest read of your position. It comes into its own when it feeds repricing, within rules you set and a margin floor you do not cross. On Google Shopping as on marketplaces, it holds the balance between competitiveness and margin, product by product. The system monitors and proposes; you keep the decision.
Frequently asked questions
Price monitoring is the continuous surveillance of the prices your competitors charge for the same products as you, channel by channel. It shows who sells what, at what price, and where your offer sits, so you price with real data rather than guesswork.
Competitive intelligence watches a competitor's whole activity: offer, channels, communication. Price monitoring focuses on one data point, the price, and leads to one precise decision, yours. It is the more operational of the two.
No. Winning the Buy Box does not depend on price alone: a WWW 2016 study shows sellers win it without being the cheapest. Better to place yourself with monitoring, hold a margin floor, and cut only where it helps.
AI matching ties your products to competitor offers by title, image and attributes, even without an EAN. On complex catalogs, accuracy reaches 99% by adding matching instructions for niche attributes.
By arbitrating product by product rather than across the whole catalog. Monitoring places your price; you cut where visibility is at stake and raise where you are alone, keeping a margin floor. That balance is what monitoring makes visible.
Yes. Collecting the public prices of your competitors is legal in France, where prices are set freely. Two rules: collect the data fairly, respecting sites' terms, and never use it to agree on prices with competitors.
For a few dozen references on one channel, a manual check is enough. Past a few hundred products across several marketplaces, manual monitoring is no longer sustainable: software collects the prices for you and flags where to react.
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