Startups

NDA Explained: What Every Startup Founder Needs to Know

February 15, 2026
6 min read

What is an NDA?

A Non-Disclosure Agreement (NDA) — also called a confidentiality agreement — is a legal contract that prevents one or both parties from sharing confidential information with third parties. For startup founders, NDAs are essential tools for protecting your ideas, technology, and business strategies.

Types of NDAs

Unilateral (One-Way) NDA

Only one party shares confidential information. Common when you're sharing your idea with a potential investor, contractor, or employee.

Mutual (Bilateral) NDA

Both parties share confidential information. Common in partnership discussions, joint ventures, or when two companies are exploring a merger.

When Should You Use an NDA?

  • Before pitching to investors (though many VCs won't sign them)
  • When hiring contractors who will work on proprietary technology
  • Before partnership discussions with other companies
  • When sharing trade secrets with vendors or suppliers
  • During M&A due diligence

Key Elements of a Strong NDA

Definition of Confidential Information

Be specific about what's covered. "All information shared" is too broad. Define categories: source code, financial data, customer lists, business strategies, etc.

Exclusions from Confidentiality

Standard exclusions include information that is already public, independently developed by the receiving party, or required to be disclosed by law.

Term

How long does the confidentiality obligation last? Typical terms range from 1-5 years. For truly sensitive trade secrets, consider an indefinite term.

Remedies for Breach

Include a clause allowing injunctive relief — this lets you seek a court order to stop disclosure immediately, without waiting for a full trial.

Common NDA Mistakes

Using a generic template without customization. NDAs need to be tailored to your specific situation and jurisdiction.

Making it too broad. Courts may refuse to enforce overly broad NDAs. Be specific and reasonable.

Forgetting to include return/destruction of information. Specify that confidential materials must be returned or destroyed upon request.

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