Comparison sites as an SEO trick

Anyone looking for software, tools, platforms or services today will almost inevitably come across comparison sites. “Tool A vs. tool B”, “The best alternatives to …”, “Comparison: provider X, Y and Z”. At first glance, this content appears neutral, objective and advisory. In fact, in many cases it is a targeted marketing tool: the comparison is not an end in itself, but a means to an end. The aim is to intercept search queries, keep users on your own site and position your own product or service as the supposed winner.

In terms of SEO, this model works extremely well. Legally, however, it is much trickier than many start-ups, agencies and marketing teams assume. This is because there is no clear line between permissible comparison, misleading advertising, trademark infringement and anti-competitive behavior, but rather a risk area that depends heavily on design, tonality and context.

This article classifies when comparison sites are permissible, where advertising begins, when trademark or naming rights are infringed and at what point competition law applies. At the same time, it shows how comparison formats can be designed to be legally compliant – without sacrificing SEO impact.

The SEO background: Why comparison sites are exploding right now

Comparison sites are not a new phenomenon. What is new, however, is their systematic use as a traffic magnet for competitor keywords. Anyone searching for a well-known provider no longer necessarily ends up on their website, but on a third-party site that compares the provider “neutrally” with others – often with the result that the site operator itself appears to be a better alternative.

This is understandable from an SEO perspective. Search queries with specific brand names have a high purchase or closing intention. Intercepting these users at an early stage controls the decision-making process. Comparison articles extend the dwell time, reduce bounce rates and make it possible to present your own advantages in a targeted manner without appearing overtly promotional.

Legally, however, this creates an area of tension: the content is perceived as an editorial comparison, but is actually advertising in disguise. This is precisely where the legal checks come in.

Comparison or advertising? The legal classification of the format

The first key point is the classification of the comparison as a commercial act. As soon as a comparison serves to promote the sale of your own products or services, it is advertising – regardless of whether the word “advertisement” or “promotion” is used.

This in itself is not prohibited. It only becomes problematic if the advertising character is concealed or the comparison gives the impression of objective neutrality, which it does not actually fulfill. This is precisely where the prohibition of misleading advertising under competition law comes into play.

Comparative advertising is generally permitted. It may even explicitly name competitors and compare products. However, the comparison must be factual, verifiable and not disparaging. In addition, it must not mislead about the company’s own market position or attribute characteristics that are not objectively true.

Many SEO comparison sites operate at this limit. Typical risk factors are selective criteria that are specifically tailored to your own strengths, unbalanced weightings or the deliberate omission of relevant disadvantages of your own offer. It is not the comparison itself that is legally problematic, but the suggestive effect: the user should believe that they have received an objective decision-making aid, although they have actually been guided by marketing.

The stronger this impression of objective neutrality is created, the higher the legal requirements for transparency and accuracy.

Trademark and name mentions: When the line is crossed

The use of third-party brand and company names is a particularly sensitive area. Comparison sites thrive on mentioning well-known brands in order to be visible in search engines. In principle, this is permissible. The naming of a third-party trademark for comparison purposes does not in itself constitute a trademark infringement.

However, it becomes problematic if the impression is created that there is an economic connection, cooperation or special proximity between the compared companies. It is equally critical if the third-party trademark is used beyond what is necessary, for example in domain names, URL structures or particularly emphasized graphic elements.

The context is also decisive. If a trademark is only used to identify the object of comparison, this is generally permissible. However, if it is used specifically to profit from or weaken the reputation of the trademark, this may constitute unlawful exploitation of reputation or damage to reputation.

Comparison sites that use formulations that suggest a rating without being able to objectively prove it are particularly risky. Statements such as “better than”, “safer than” or “the only real alternative to” can be legally challenged if they are not based on clearly comprehensible and verifiable criteria.

Negative comparisons are also tricky. Although criticism may be voiced, it must remain factual. Sweeping devaluations, abbreviated descriptions or the deliberate highlighting of individual weaknesses without an overall context can be anti-competitive.

Competition law: misleading, disparaging and surreptitious advertising

Under competition law, the focus is on three key questions: Is the consumer being deceived? Is a competitor being unfairly disparaged? Is advertising disguised as editorial content?

A comparison is particularly misleading if essential information is missing or distorted. This also includes the omission of relevant comparison criteria or the concealment of one’s own disadvantages if these are significant for the purchase decision. The same applies to the impression of completeness if only a selection is actually compared that happens to maximize one’s own advantage.

Disparagement occurs when competitors are not criticized objectively, but devalued or ridiculed. This can also be done subtly, for example through a suggestive choice of words or graphic representation. In legal terms, an inappropriate tone is sufficient to constitute an infringement of competition law.

Another critical point is surreptitious advertising. If the commercial purpose of a comparison is not clearly recognizable, this can also be anti-competitive. This applies in particular to sites that present their own provider as a “test winner” or “editor’s recommendation” without disclosing that this is self-promotion.

The more the comparison imitates journalistic or independent formats, the higher the requirements for transparency. If you want to appear neutral, you have to be neutral – or reveal that you are not.

How comparison sites can be designed to be legally compliant

Comparison sites are not illegal per se. On the contrary: if implemented correctly, they can be a legitimate marketing tool. The decisive factor is proper legal design.

First of all, this includes a clear line of content. A comparison should use comprehensible criteria that are relevant to the market and explain these criteria transparently. Subjective evaluations are permissible, but must be recognizable as such.

The language used is just as important. Superlatives, absolute statements and blanket devaluations significantly increase the risk. A factual, differentiated presentation is legally more robust – and often comes across as more credible.

From a legal perspective, it also makes sense to clearly identify your own role. If you are a provider yourself, you should not hide this. Being open about your own interests reduces the risk of being classified as misleading or unfair.

Finally, contractual and organizational aspects also play a role. Agencies that create comparison sites for clients should secure themselves contractually. The same applies to start-ups that operate such sites: Liability issues, indemnification and responsibilities should be clearly regulated internally before disputes arise.

Conclusion: SEO comparisons are permitted – but not a legal vacuum

Comparison sites are a powerful SEO tool. They work because they target search intentions and engage users in the decision-making process. Legally, however, they operate in a sensitive area between permissible comparative advertising and unfair competition.

Anyone who uses these formats without reflection risks warnings, injunctive relief and damage to their image. On the other hand, those who use them in a structured, transparent and legally sound manner can use them effectively and sustainably.

For start-ups, this means that comparison sites are not just a marketing issue, but a cross-section of marketing, contract design and competition law. This is precisely where it is decided whether an SEO trick will work in the long term or become expensive in the short term.

Author: Marian Härtel

Marian Härtel ist Rechtsanwalt und Fachanwalt für IT-Recht mit einer über 25-jährigen Erfahrung als Unternehmer und Berater in den Bereichen Games, E-Sport, Blockchain, SaaS und Künstliche Intelligenz. Seine Beratungsschwerpunkte umfassen neben dem IT-Recht insbesondere das Urheberrecht, Medienrecht sowie Wettbewerbsrecht. Er betreut schwerpunktmäßig Start-ups, Agenturen und Influencer, die er in strategischen Fragen, komplexen Vertragsangelegenheiten sowie bei Investitionsprojekten begleitet. Dabei zeichnet sich seine Beratung durch einen interdisziplinären Ansatz aus, der juristische Expertise und langjährige unternehmerische Erfahrung miteinander verbindet. Ziel seiner Tätigkeit ist stets, Mandanten praxisorientierte Lösungen anzubieten und rechtlich fundierte Unterstützung bei der Umsetzung innovativer Geschäftsmodelle zu gewährleisten.