Antitrust claims versus unfair competition claims
In the United States, competition litigation can mean two different things. Antitrust claims address harm to competition in a market, such as agreements among competitors or exclusionary conduct by a firm with market power, and they generally require showing injury to competition rather than just to one business. Unfair competition claims are narrower and more direct, including false advertising under the Lanham Act, misappropriation of trade secrets, and passing off one's goods as another's. New York's common law of unfair competition often centers on bad-faith misappropriation of another's labor or goodwill. Which category fits shapes the evidence, the court, and the remedies.
The evidence these cases demand
Antitrust cases depend heavily on economic proof: how the market is defined, what share the defendant has, and how the conduct affected prices, output, or innovation. That usually means economists and substantial data, and these cases tend to be long and costly. False advertising and trade secret cases rely more on documents, customer testimony, and evidence of the specific statements or information at issue. Keep copies of the competitor's advertisements, communications from customers who mention them, records of lost accounts, and anything showing how your confidential information may have been taken. If you are the defendant, preserve your own marketing and pricing records and pause routine deletion.
Starting a competition dispute
In a first consultation we look at what the competitor did, how it affected your business, and what you need most, whether a fast court order to stop ongoing conduct or compensation for past harm. Some matters can be addressed through a cease-and-desist letter or an industry self-regulatory process before litigation. Others call for an early motion for a preliminary injunction, which requires prompt action and solid evidence, since delay can undercut the claim of urgency. We also consider the risk of counterclaims and the cost of discovery into your own business. The aim is to match the claim to the harm rather than reach for the largest theory available.
