Naming a competitor directly in your ad is legal in the US. Getting the comparison wrong is what gets you sued, not the act of comparing.
This lesson covers the actual legal test, so "we compared honestly" has substance behind it instead of being a hope.
Comparative advertising is allowed, on purpose
The FTC has long encouraged truthful comparative advertising because it gives consumers useful information and pushes competition on real product differences. You can name a competitor, show their price, and claim you're faster, cheaper, or better, as long as the claim is true and provable.
The risk isn't the comparison itself. It's the gap between what you can prove and what your ad implies.
Comparative claims get more scrutiny than general puffery. Saying "the best coffee in town" is unprovable opinion, generally safe. Saying "50% less caffeine than Brand X" is a specific, checkable factual claim, and now you need data to back it up if challenged.
The Lanham Act test
Section 43(a) of the Lanham Act is the federal law competitors use to sue each other over false advertising, and it's the main legal exposure for a comparative campaign. To win, a competitor has to prove five things.
- The ad makes a false or misleading statement of fact about a product, not just an opinion.
- The statement deceived or had the capacity to deceive a meaningful share of viewers.
- The deception is material, meaning it's likely to actually influence a buying decision.
- The products are in interstate commerce, almost always satisfied for any national brand.
- The plaintiff has been or is likely to be injured by the claim, usually via lost sales or reputational harm.
Notice what's absent: intent. You don't need to prove the advertiser meant to deceive, only that the claim was false or misleading and mattered to buyers. That's a lower bar than fraud, which is exactly why Lanham Act suits between competitors are common.
What "literally true but misleading" means
The most important nuance in comparative-ad law is that a technically accurate statement can still lose in court if it creates a false impression.
In the 2019 "corn syrup" case, Anheuser-Busch ran Super Bowl ads stating Miller Lite and Coors Light are "brewed with corn syrup," while Bud Light is not. That statement was literally true, corn syrup is used during brewing. Molson Coors sued, arguing the ads implied corn syrup was present in the finished beer, which it is not (it burns off during fermentation).
The Seventh Circuit ultimately sided with Anheuser-Busch, ruling the ads never claimed the competitors' beer "contains" corn syrup, only that it's used in brewing. The case is a useful lesson in both directions: precise, literally true wording can survive a challenge, but it takes years and real legal cost to find out, and a slightly sloppier version of the same ad could have gone the other way.
Where these claims commonly fail
Marketers get burned by a handful of repeat patterns.
- Cherry-picked test conditions. Comparing your product's best-case result against a competitor's average or worst-case scenario.
- Outdated competitor data. Citing an old price, formulation, or feature set the competitor has since changed.
- Implied claims beyond the literal words. Visuals or context that suggest more than the text technically says, courts look at overall impression, not just the sentence.
- No substantiation on file. The FTC and courts expect you to have the data before you run the ad, not scramble to find support after a challenge.
Keep a substantiation file for every comparative claim before it launches, the source data, testing methodology, and date. If you can't produce backup within a day of a challenge, that delay itself looks bad in litigation.
Two paths a challenge can take
A competitor who thinks your ad crossed the line has two venues, and they behave very differently.
- Lanham Act lawsuit: federal court, can seek injunctions and damages, slow and expensive, but a real financial threat if you lose.
- NAD (National Advertising Division) challenge: industry self-regulatory body, faster and cheaper than litigation, no binding legal power but non-compliance can be referred to the FTC and creates reputational pressure.
Many disputes start at NAD precisely because it's faster; a company that loses there often pulls or amends the ad rather than risk it becoming exhibit A in a federal case.
A practical checklist before you name a competitor
- Confirm every factual claim has current, documented testing or data behind it.
- Have someone outside the creative team read the ad and describe what they think it's claiming, not what you intended.
- Avoid comparing your best conditions to their worst, or an old competitor spec to your current one.
- Route any claim naming a specific competitor through legal review before media buys, not after launch.
Comparative advertising can be a genuinely strong tactic, it's memorable and specific. Just make sure the claim can survive the same scrutiny you'd apply if the roles were reversed.