Naming Your Rival in an Ad: When It Works, and When It Backfires
Comparative advertising — naming or clearly pointing at a competitor — is a challenger's weapon that can make your claim unforgettable, but it only works when the comparison is specific, verifiable and fair; done carelessly it advertises your rival and invites a legal or reputational backlash.
It's legal — within limits
In the UK and across the EU, comparative advertising is allowed, but it is fenced. Under the long-standing EU comparative advertising rules (Directive 2006/114/EC) and the UK's CAP/BCAP advertising codes, a comparison must not be misleading, must compare products meeting the same needs, must compare material and verifiable features, and must not denigrate or create confusion with a competitor's trademark. In plain terms: you can say you're cheaper or better, but you must be comparing like with like, and you must be able to prove it.
This is why the genre skews towards price and specification — numbers are verifiable — and away from vague swipes, which are both weaker and legally riskier.
Why it works — when it works
The reason brands keep reaching for comparison is that it does three things no other format does as efficiently. It borrows the rival's salience, letting a smaller player punch up into a conversation they'd otherwise be shut out of. It makes an abstract claim concrete — 'better value' is forgettable, 'cheaper than their basket' is not. And it forces the comparison into the customer's head at the decision moment, pre-framing the choice in your favour.
The classics endure for a reason: Avis's 'We try harder' turned being number two into a virtue; decades of challenger campaigns have used a market leader as a free backdrop. Aldi's UK price-comparison work and Kaufland's current attack on the discounters in Germany are the same move — a challenger annexing the leader's ground.
Why it backfires
The first trap is that attacking a rival also advertises them. If you are the market leader, naming a smaller competitor simply hands them the oxygen of your audience — which is why comparison is almost always a challenger's tactic, not a leader's.
The second trap is the cherry-pick. The moment customers sense your comparison is selective — the one SKU where you win, the feature that flatters you — the campaign flips from confident to weaselly, and trust drains faster than any sales bump you bought. The third is escalation: a rival can respond, and a public slanging match often shrinks the category's dignity without moving share.
A simple test before you launch
Marketing Minute's rule of thumb is three questions. One: are you the challenger here? If you're the leader, think very hard before gifting a rival your reach. Two: would your claim survive a sceptic with a spreadsheet — is it specific, like-for-like and genuinely representative, not just technically true? Three: does it make you look confident or petty? The best comparative work has a smile in it; the worst reads as insecurity.
Pass all three and comparison can be the most capital-efficient attention you'll ever buy. Fail any one and you've paid to promote your competitor and hand them a comeback.
Quick FAQ
Is it legal to name a competitor in an advert in the UK?
Yes. Comparative advertising is legal in the UK and EU provided the comparison is not misleading, compares like-for-like products on verifiable features, and does not denigrate or cause confusion with the competitor's brand.
Should a market leader use comparative advertising?
Rarely. Naming a smaller rival gives them free exposure to your audience. Comparison is almost always a challenger's tool for borrowing the leader's salience.
I love a well-judged comparative ad and I wince at a clumsy one. The test I give clients is simple: are you the underdog, can you prove the claim to a cynic, and does it make you look confident rather than bitter? Miss any of those and you've just bought advertising for your competitor. — Daniel Nikolla, Founder of Merx Marketing
Comparison is a challenger's weapon: specific, provable and good-humoured, it's the cheapest attention you can buy — vague or cherry-picked, it promotes your rival for you.
Is there a comparison in your category you could make — and genuinely defend — that would reframe the choice in your favour?
If you would like to know more about this topic, please contact us on danieln@merxmarketing.co.uk
Sources: EU Directive 2006/114/EC; UK CAP/BCAP Codes; Marketing Minute analysis.
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Written by Daniel Nikolla, Founder of Merx Marketing Ltd and Marketing Minute
