A Confidentiality Agreement is a legal agreement that binds one or more parties to non-disclosure of confidentiality or proprietary information. A confidentiality agreement is often used in situations wherein sensitive corporate information or proprietary knowledge is not to be made available to the general public or to competitors. A Non-Disclosure Agreement (NDA) is a particular type of confidentiality agreement.
Source: https://www.investopedia.com/terms/c/confidentiality_agreement.asp