A Mutual Non-Disclosure Agreement (MNA) between companies is a legally binding agreement that protects confidential information shared between two or more companies from being disclosed to any third parties. It is a form of contract used to protect trade secrets, confidential business information, and sensitive data from being used without authorization. The agreement also limits the use of the information disclosed and establishes a confidential relationship between the parties. There are three types of Mutual Non-Disclosure Agreements between Companies: Unilateral, Bilateral and Multilateral. Unilateral: This type of agreement is between one party and another. The one party agrees to keep information confidential and not to disclose it to any third parties. Bilateral: This type of agreement is between two parties. The parties agree to keep information confidential and not to disclose it to any third parties. Multilateral: This type of agreement is between multiple parties. The parties agree to keep information confidential and not to disclose it to any third parties. All types of Mutual Non-Disclosure Agreements between Companies should contain provisions for what information is considered confidential, how long the agreement will last, how the parties will handle the confidential information, and what the consequences will be if the agreement is breached.