Defamation Between Business Competitors: Comparative Advertising, Posts and Rumors
Business competition is legitimate and desirable — but sometimes a competitor crosses the line: spreading false rumors, publishing a misleading and harmful comparison, or writing fake reviews under a false identity. Harm from a competitor is especially dangerous because it is deliberate, targeted and sometimes ongoing. This guide explains when publication between competitors constitutes defamation or a separate commercial tort, the legal tools available to a business harmed by a competitor, and how to act.
1. Competitor Publication — Defamation and Beyond
When a competitor publishes false, degrading facts about you — that your product is dangerous, that you defraud customers, that you are in financial difficulty — this is defamation under the Defamation Act, 1965. But harm from a competitor may give rise to additional causes of action: the Commercial Torts Law, 1999, prohibits a 'false description' — publishing false information about a competitor's business or product. So a business harmed by a competitor may sue both under defamation and under a commercial tort, broadening the tools and remedies available to it.
2. Comparative Advertising — When It Crosses the Line
Comparative advertising ('our product is better than X') is not prohibited per se, and in some cases is even permitted. The problem begins when the comparison is based on false facts, deliberately misleading, or presents the competitor's product in a false and harmful light. The distinction: a factual, true comparison ('we are cheaper') vs. a false description ('their product is dangerous/defective') without basis. A false comparative publication may constitute both defamation and a commercial tort. It is important to document the comparative publication and examine whether the factual claims in it are true.
3. Fake Reviews and Rumors Under a False Identity
A common and improper tactic: a competitor writing fake negative reviews about your business under a fake profile, or spreading false rumors in groups. This is a combination of defamation and impersonation. The challenge: identifying the source, which is sometimes anonymous (see the limitations discussed in the guide on unmasking an anonymous user). Nonetheless, patterns can sometimes be identified — timing, style, identifying details — and a link to the competitor established. In such cases, alongside content removal, action can be taken against the competitor both under defamation and under a commercial tort, and in serious cases even a criminal aspect.
4. How to Protect the Business From a Harmful Competitor
Acting against harm from a competitor requires a strategy: document every suspicious publication, rumor or review, including timing and context. Gather evidence linking the publication to the competitor. Approach the platforms for content removal. A demand letter to the competitor, detailing both causes of action (defamation and a commercial tort), is a strong step — an identified competitor with a tangible business is more exposed than an anonymous user. In cases of ongoing harm or significant loss, a claim and injunction may be considered. Systematic documentation is the basis for any action.
Checklist
- Document every suspicious publication/rumor/review, including timing and context
- Gather evidence linking the publication to the competitor
- Check whether two causes of action apply — defamation and a commercial tort
- For comparative advertising — examine whether the factual claims are true
- Approach the platforms for content removal
- Consider a demand letter detailing both causes of action
Common Pitfalls
- Ignoring the commercial-tort cause of action (Commercial Torts Law) alongside defamation
- Failing to document the link between the publication and the competitor
- Assuming comparative advertising is always prohibited — it is permitted if factual and true
- Failing to identify patterns linking fake reviews to the competitor
- Waiting while the competitor continues the ongoing harm
שאלות ותשובות
A competitor spreads false rumors about me — what can I do?
You may have two causes of action: defamation and a commercial tort (false description). Document, gather evidence linking to the competitor, approach for removal and consider a demand letter or claim.
Can a competitor publish a comparison between the products?
A factual, true comparison is permitted. The problem is when the comparison is based on false facts or presents your product in a false and harmful light — then it is defamation and/or a commercial tort.
I suspect a competitor writes fake reviews about me — what do I do?
Document the reviews and patterns (timing, style). Identifying an anonymous source is complex, but a link to the competitor can sometimes be established. You can act for removal and sue under both causes of action.
What's the difference between a defamation claim and a commercial tort?
Defamation protects reputation; the Commercial Torts Law prohibits a false description of a competitor's business/product. In harm from a competitor, both causes of action sometimes apply together.