# Nondisclosure agreement (NDA)

URL: https://aidataforsale.com/glossary/nondisclosure-agreement
Publisher: AI Data For Sale (Marketing Signals Ltd)
Updated: 2026-11-10

A contract in which parties agree to keep shared information confidential and use it only for an agreed purpose.

## The NDA's role in AI data deals

An NDA is usually signed before a seller shares a data sample or detailed description with a buyer. It limits the buyer to evaluating the sample, bans other use, and requires deletion if no deal follows.

## What a sample NDA should say

- **Purpose:** evaluating the sample for a possible license, nothing else
- **No training:** the sample may not be used to train or fine-tune any model
- **Access:** only named people may see it
- **Deletion:** destroy the sample if no deal is signed, with written confirmation
- **No re-identification:** no attempt to identify people in the data
- **Mutual terms:** if the buyer shares confidential needs, both sides are protected

## What an NDA does not do

An NDA does not grant rights to use data commercially. That needs a [data license](https://aidataforsale.com/glossary/data-license). It also does not make it safe to share personal information; samples should still be [de-identified](https://aidataforsale.com/glossary/de-identification).