NDA vs Confidentiality Agreement: Is There a Difference?

The short answer

NDA stands for non-disclosure agreement. A confidentiality agreement is the same instrument: a contract that restricts what one or both parties may do with information they receive. Lawyers use the two terms interchangeably, and courts treat them as the same category.

The reason both names exist is history, not law. "NDA" became the common term in venture and employment contexts; "confidentiality agreement" stayed common in commercial and professional services contracts. You will also see "confidential disclosure agreement" (CDA) and "proprietary information agreement" (PIA) — all the same thing.

What actually differs

The differences that matter are not in the name but in four choices inside the document.

• Direction — one-way (only one side discloses) or mutual (both disclose). Mutual is standard for partnerships and freelance engagements.
• Scope — blanket ("all information disclosed") versus marked ("information marked confidential"). Blanket is broader but harder to enforce; marked is precise but easy to work around.
• Term — how long confidentiality lasts. Two to five years is typical for commercial information; trade secrets can be protected indefinitely.
• Purpose — an NDA is often a standalone document signed before talks, or a clause inside a larger contract. The clause version is usually narrower and applies only to information shared under that contract.

Which one you need

If you are about to share pricing, roadmaps, source code or a client list with someone who is not yet a client, use a standalone mutual NDA. It is short, and either side can sign it without negotiating a bigger agreement.

If you are signing a services agreement anyway, do not add a second standalone NDA. Put a confidentiality clause inside the main contract instead — two documents that overlap create conflicts about which controls.

If you are receiving information from a company as a contractor, expect a one-way NDA drafted in their favour. Read the definition, the term, and whether there is a non-solicit hidden inside it.

What to check in either version

• Definition — is it blanket or marked, and are oral disclosures covered?
• Exclusions — public information, prior knowledge, independent development, and legally required disclosure.
• Term and survival — how long, and does the trade secret carve-out exist?
• Return or destruction — what happens at the end, and can you keep one archival copy?
• Residuals — if you are the receiver, a residuals clause lets you use what stays in your memory; without it, you are exposed.
• Non-solicit or non-compete smuggled in — these are different obligations and should be priced and negotiated separately.

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