What Is a Non-Disclosure Agreement?

Why It Matters

Businesses routinely share sensitive information — financial projections, customer lists, product designs, source code, or strategic plans — with people outside the company, including potential investors, contractors, and partners. Without some form of confidentiality protection, that information could be shared further or used against the company's interests.

NDAs are one of the most common early-stage documents used in business relationships, often signed before any substantive negotiation or collaboration even begins, precisely because they are meant to protect information exchanged during those very discussions.

How It Works

An NDA generally defines what counts as 'confidential information,' establishes obligations for how that information can and cannot be used or shared, and sets a duration for how long those obligations last. Some NDAs are unilateral (one party is disclosing information and the other is receiving it), while others are mutual (both parties are sharing sensitive information with each other).

Confidentiality clauses of this kind typically include exceptions — for example, information that was already publicly known, information the receiving party already had before the agreement, or disclosures required by law or court order. These carve-outs matter because without them, an NDA could technically restrict information that was never actually secret.

NDAs often also specify remedies if confidentiality is breached, and some include provisions addressing what happens to any materials or copies of confidential information once the relationship or agreement ends.

Key Elements

A typical NDA generally includes several core components that determine how much practical protection it provides.

• Definition of confidential information — what specifically is protected
• Obligations of the receiving party — how the information can be used and who it can be shared with internally
• Exclusions — categories of information not covered, such as public knowledge or independently developed information
• Term — how long confidentiality obligations last, which may extend beyond the end of the broader business relationship
• Remedies — what recourse is available if the agreement is breached

A Business Example

Example: A startup preparing to pitch investors may ask each potential investor to sign a mutual NDA before sharing detailed financial models and product roadmaps. If an investor later shared those materials with a competing company, the NDA could provide the startup with contractual grounds to pursue a remedy, assuming the disclosed information met the agreement's definition of confidential information and no exception applied.

In practice, many sophisticated investors decline to sign NDAs before early pitch meetings, which is why founders often need to think carefully about what information to disclose and when, regardless of whether an NDA is in place.