COMPARISON METHOD
Our method
How Kalyneo chooses the products compared, where the prices come from, how offers are ordered, how ratings are calculated, and what relationship binds us to the merchants listed.
Last updated: 4 September 2026
This translation is provided for your convenience. These documents are governed by French law and, in the event of any discrepancy, only the French version is authoritative.
What Kalyneo compares
Kalyneo compares consumer products (electronics, home appliances, home, garden) along two dimensions: their price at the merchants we follow, and their quality, as we assess it on a criteria grid specific to each category.
Every product page is content we write. Every offer is a price observed at a merchant at a given moment, time-stamped and kept. Those two things are distinct, and the page keeps them distinct: our opinion is not merchant data, and merchant data is not an opinion.
The comparison works market by market. The market determines which merchants are queried, the currency and the prices. A product with no offer available on the market being browsed does not appear in that market’s lists: comparing a price charged in one country with a price charged in another would produce a false ranking.
The default ordering
The ordering criterion depends on the page. None of them involves the remuneration we receive.
| Page | Default order | Other sorts offered |
|---|---|---|
| List of offers on a product page | Ascending price, from cheapest to dearest | None: the order is fixed |
| Category page | Descending score, calculated at neutral weighting | Ascending price; descending buyer rating |
| Search results | Descending score, calculated at neutral weighting | Ascending or descending price; descending buyer rating |
| Category rankings | Descending score, calculated at neutral weighting, ten products at most | None |
| Podium | Descending score, at neutral weighting | None |
| Deals | Descending percentage drop | Descending amount saved; ascending price |
The “score” named in this table is the one described below. “Neutral weighting” gives price and performance exactly the same weight: it is the one every ranking on the site uses.
One point deserves to be spelled out: on a product page, offers are ordered on price alone. Two merchants offering the same price appear one after the other without the order expressing any preference. The commission rate, the age of the partnership or the volume of business play no part anywhere.
The criteria grid
The quality of a product is assessed on at most six criteria, rated from 0 to 100. Each criterion belongs to an axis, which determines its weight in the score calculation, described in the next section.
| Criterion | What it measures | Axis |
|---|---|---|
| Price | Where the product stands against the other products in its category, at comparable specifications, on the market being browsed | Price |
| Speed | Processing performance, measured on standardised tests and brought back to a hundred-point scale | Performance |
| Battery life | Running time observed in mixed use, and not the figure announced by the manufacturer | Neutral |
| Screen | Resolution, brightness and colour accuracy | Performance |
| Camera | The quality of the images produced by day and by night | Performance |
| Durability | Resistance to knocks and water, and ease of repair | Neutral |
A category keeps only the criteria that mean something to it. A fridge has no camera rating. A category may also rename a criterion so that its label matches what it actually measures there: the “speed” of a television is called “motion handling”, that of a fridge “cooling and control”. The label changes, the place of the criterion in the calculation does not. The grid applied to a category is visible on the page of each of its products.
How the criteria are weighted
A product’s score is the weighted average of its ratings on the criteria of its category, rounded to the nearest whole number. A product is never rated on a criterion its category does not keep, and a criterion left blank is excluded from the calculation rather than counted as zero.
The weighting depends on a price ↔ quality setting that is not offered to visitors: every ranking published here uses the balanced position, the one that gives price and performance exactly the same weight. The two other bounds are given below so that the calculation stays verifiable end to end.
| Priority | Price axis | Performance axis | Neutral axis |
|---|---|---|---|
| Price above all | 1.90 | 0.40 | 1.00 |
| Balanced price / quality (applied everywhere) | 1.15 | 1.15 | 1.00 |
| Quality above all | 0.40 | 1.90 | 1.00 |
Intermediate values follow a linear progression between these bounds. At the balanced position, price and performance weigh exactly the same: that is the weighting used for every ranking on the site. At the “price” end, one point of price rating is worth almost five points of performance rating.
Two direct consequences: the same criterion rating does not place a product at the same rank in every category, since the criteria grid differs; and two products with equal scores are shown as equal rather than separated arbitrarily.
The strong point shown on a product card is simply the criterion on which the product gets its best rating. It does not depend on the weighting.
What the prices shown include
The prices shown are the prices of the products excluding delivery charges. They are inclusive of all taxes, and exclude options, extended warranties and any eco-participation levy billed separately.
Offers are therefore ordered on the price of the product alone. Delivery charges vary with the option chosen, the place, the size of the order and whether a subscription exists: we do not fold them into the ranking as long as we cannot establish them with certainty for every visitor. The lowest price shown here is therefore not always the lowest total at checkout; do check the shipping charges at the merchant before confirming.
A price shown is an observed price, not a guaranteed one. Only the price stated by the merchant when you confirm your order is binding. Prices change within a single day, and a product may become unavailable between our reading and your visit.
Kalyneo only shows a price when it has been collected automatically from the merchant, through its programming interface or its catalogue feed, and that price is published together with its collection date. No price is entered by hand, nor copied from a merchant page.
For merchants whose prices are not yet connected, the product page links to the merchant without showing a price. A button with no figure is better than a figure we could not date: a price that ages unnoticed is a false price.
Promotions and reference prices
A struck-through price is never taken from a merchant. It is recalculated by us, from the price history we keep.
The rule applied is the one from the so-called Omnibus directive: the reference price is the lowest price we recorded during the thirty days before the reduction began. A reduction is announced only if the current price is genuinely below that reference, and the percentage shown is the exact gap between the two.
Two things follow from that rule. First, with too little history, no promotion is shown at all: a product we have only just begun to follow will carry no struck-through price, even if the merchant announces one. Second, a reduction that has lasted more than thirty days stops being presented as a promotion: the reduced price has by then become the usual price, and going on striking through the old one would be misleading.
The wording “lowest price recorded” appears only where the current price is actually at or below the lowest price we have ever recorded for that product on that market.
Buyer ratings
Kalyneo writes no reviews and copies none. From each merchant we collect the average rating it publishes for a product and the number of reviews it rests on. The product page shows those lines as they are, merchant by merchant.
A product’s overall rating is the average of those ratings, weighted by the number of reviews: a rating of 4.5 based on a thousand reviews weighs more than a rating of 5 based on three. The total shown is the sum of the review counts of the lines presented: you can add them up and find the same figure. The three places on the site that quote a rating read that same calculation.
Merchant interfaces do not pass us the text of reviews, only the rating and the count. That is why no buyer comment is reproduced here, and why a link points to the source for reading them. We never use the phrase “verified reviews”: we verify nothing, we report what merchants publish, and we say so.
Those buyer ratings are independent of our quality assessment. They are not folded into the score.
Sources and update frequency
Prices and availability come from the programming interfaces and catalogue feeds of merchants and their affiliate platforms. Technical specifications come from manufacturer datasheets, completed and corrected by us. Criteria ratings are established by the Kalyneo editorial team, from standardised tests, published measurements and the comparison of specifications within one category.
Reading frequency: À COMPLÉTER.
Every reading is time-stamped and kept. The time stamp shown beside a price is that of the actual reading, never today’s date: that is what lets you judge how fresh it is. A reading more than 24 hours old is no longer treated as a current price. That limit is also a condition set by certain partner programmes.
The date this page was last updated appears under its title. The date prices were last read, which is a different piece of information, appears on every product page.
How merchants pay us
Yes, there is a paid contractual relationship between Kalyneo and the merchants listed. We are funded by affiliation: when you buy after following one of our links, the merchant pays us a commission, taken from its margin and with no bearing on the price you pay.
That remuneration plays no part in any of the orderings described above. No position, no rating, no verdict and no article is for sale. A merchant that pays us nothing is listed on exactly the same terms as one that does.
The programmes, the attribution windows and the statements each contract imposes are set out on the Affiliation page.
Listing and delisting
A merchant
A merchant is listed once three conditions are met: it offers a catalogue overlapping our categories; it makes available a feed or an interface allowing automatic, reliable reading of its prices and availability; it is authorised to sell on the market concerned. A merchant is registered by country: the same chain present in two countries makes two separate listings, each with its own prices and its own terms.
A merchant stops being listed, without notice and without compensation, if its feed becomes unavailable or lastingly inaccurate, if its announced prices do not match those found at checkout, if error reports about it multiply, or when the contractual relationship ends. Delisting removes its offers; it does not remove the products, which stay compared at the other merchants.
A product
A product is listed when it is available at at least one merchant we follow, when it belongs to a category whose criteria grid exists, and when we have what we need to rate it. The selection is editorial: we favour models genuinely available and representative of their category, and no manufacturer or merchant can have one added for payment.
A product is removed when it is no longer available at any merchant on the market being browsed, when it is replaced by a new generation, or when a matching error is found. A product with no available offer on a market disappears automatically from that market’s lists.
Matching an offer to a product
Attaching a merchant’s offer to the right product is the most delicate operation on a comparison site: a wrongly attached offer shows a false price. Matching is carried out in decreasing order of reliability: product barcode, then manufacturer reference, then approximate matching of the label. An uncertain match is never accepted automatically: it is placed in a queue and settled by hand.
What the comparison does not cover
Kalyneo is not exhaustive and makes no claim to be. We compare only the offers of the merchants we follow, and only for the products we have listed. A product may be sold more cheaply elsewhere, at a merchant we do not follow.
We compare neither second-hand or refurbished offers, nor peer-to-peer marketplaces, nor offers tied to a subscription or to financing. Nor do we compare delivery times, the quality of after-sales service or the financial soundness of merchants: those things count in a purchasing decision, but we have no reliable measure by which to rank them.
Kalyneo sells nothing. The sales contract binds you to the merchant: it is with the merchant that withdrawal, the legal warranty and any complaint must be taken up.
Reporting an error
A price that does not match, an inaccurate specification, a rating that strikes you as unwarranted, a product attached to the wrong page: write to no-reply@kalyneo.com, stating the address of the page and, if you can, the merchant concerned.
Reports about a price are handled first. The reliability of our readings is the only thing that makes this site useful: a false price costs us more than it costs whoever reports it.