What Is a Non-Disclosure Agreement?
A non-disclosure agreement (NDA) is a legally binding contract in which one or more parties agree to keep specified information confidential. Once signed, an NDA creates an enforceable obligation of secrecy — if the receiving party leaks your trade secrets, product roadmap, or customer list, you have grounds to seek damages or an injunction. NDAs are also called confidentiality agreements or secrecy agreements; the legal effect is the same.
Unilateral vs Mutual NDA: Which Do You Need?
A one-way agreement covers a single direction of disclosure, while a two-way agreement protects both sides. Use the comparison below to decide.
| Feature | Unilateral NDA | Mutual NDA |
|---|---|---|
| Direction of disclosure | One party shares | Both parties share |
| Best for | Hiring contractors, pitching a vendor | Partnerships, mergers, joint ventures |
| Who is bound | The receiving party only | Both parties equally |
| Common example | Founder shares an app idea with a developer | Two startups explore a data-sharing deal |
Key Clauses Every NDA Should Include
- Definition of confidential information — spell out exactly what is protected, from source code to financial projections.
- Exclusions — information already public, independently developed, or lawfully obtained elsewhere should not be covered.
- Obligations of the receiving party — describe how the information must be stored, used, and shared internally.
- Term and duration — state how long confidentiality lasts, commonly two to five years.
- Return or destruction of materials — require the recipient to hand back or delete files when the relationship ends.
- Remedies and jurisdiction — clarify what happens on a breach and which law governs the agreement.
When Should You Use an NDA?
- Sharing a product concept with a developer, designer, or agency.
- Presenting financials to potential investors or acquirers.
- Onboarding employees who will access trade secrets.
- Evaluating a supplier or manufacturer that will see your specifications.
- Exploring a merger, acquisition, or joint venture.
Tip: Ask for the NDA to be signed before you reveal anything sensitive. Once the idea is out, an unsigned NDA offers no protection.
Common NDA Mistakes to Avoid
- ❌ Vague definitions — if confidential information is not clearly described, a court may refuse to enforce it.
- ❌ Unreasonable duration — a perpetual NDA can be struck down; keep terms reasonable and specific.
- ❌ Missing exclusions — without carve-outs for public information, the agreement can look overreaching.
- ❌ No governing law — skipping jurisdiction makes enforcement slow and expensive.
- ❌ Using the wrong type — a unilateral NDA in a mutual situation leaves one party unprotected.
This article is for general information only and is not legal advice.
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