Imagine buying a newsletter, a SaaS tool, or a small store, and watching the seller launch an identical business the following month, emailing the same audience with a better offer. Without a non-compete clause, there is very little stopping them, and the value you paid for can drain away in weeks. That is why this clause matters far more than its size in the agreement suggests.

A non-compete is a promise by the seller not to compete with the business they sold, for a defined time and within a defined scope. It usually sits alongside a non-solicitation promise, which stops the seller from approaching the customers and staff of the sold business. Together, they protect the goodwill you paid for.

Scope is where most disputes start, so be specific. The clause should name the type of business covered, the products or services included, and the channels affected, such as the same niche, the same audience, or the same platform. A clause that bans all business activity everywhere is unlikely to be enforceable, while a narrow, reasonable clause is far more likely to hold up.

Geography works differently for online businesses than for local shops. A local shop's non-compete might cover a town or region, but an online business competes globally, so the clause should be framed around the market and audience rather than a map. Courts in many places look at whether the restriction is reasonable for the business actually sold.

Duration should match how long goodwill lasts in the niche. One to three years is common for small online businesses, with longer periods for businesses where customer relationships are slow to build. A duration that is far longer than the business cycle looks punitive and may be struck down, leaving you with no protection at all.

The non-solicitation part deserves equal attention. A seller who cannot start a competing product can still email former customers about a different venture, or hire away the contractor who runs the product. A good clause covers customers, subscribers, and key workers, for the same period as the non-compete itself.

Consideration matters: the seller should receive something in exchange for the restriction, and in a sale that something is usually part of the purchase price. Make sure the agreement states that the non-compete is part of what you are paying for, because a clause with no stated consideration is easier to challenge.

Enforceability varies by jurisdiction, and some places restrict or ban non-competes altogether. If the seller lives in a jurisdiction with strict rules, get local legal advice before relying on the clause, and consider alternative protections such as a longer transition, an earnout tied to customer retention, or a consulting agreement that keeps the seller aligned.

Watch for workarounds sellers sometimes use, such as a spouse, business partner, or new company launching the competing product. A well-drafted clause covers businesses the seller owns, controls, or advises, not just businesses in their own name. Ask your lawyer to review this language specifically, because it is where weak clauses fail.

If a seller refuses a non-compete entirely, treat that as a major red flag and price it in. Ask why they refuse: a founder planning a new venture in the same niche will usually hesitate, while a founder genuinely moving on will not mind a reasonable restriction. A refusal, combined with a short transition, often means the seller knows exactly how valuable their next move could be.

Alternatives exist when a full non-compete is not possible. A longer earnout tied to revenue retention, a consulting period that keeps the seller engaged, or a staged payment that rewards them for staying away can all align incentives. These are weaker than a signed clause, but far better than nothing.

Negotiate the non-compete early, not at the end when everyone is tired and eager to close. Raising it late makes it feel like a trap, while raising it in the letter of intent makes it a normal part of the deal. Sellers expect it, reasonable sellers accept it, and the ones who fight it hardest are often the ones you most need protection from.

You are not just buying code, domains, and customer lists; you are buying the right to serve those customers without the previous owner standing in your way. A clear, reasonable, enforceable non-compete protects that right, and no buyer should close without one or a deliberate, priced alternative.