A letter of intent (LOI) is similar to a memorandum of understanding (MOU) in that is is a common agreement between businesses (including startups) and potential customers to define commitment, interest, terms, and pricing in writing prior to delivering the good or service. This document is used to clarify understanding of both the customer and founder and often used to show investors. LOI and MOU agreements are used interchangeably and usually non-binding. At times, in working with customers on large projects with multiple phases where the customer and business work together before payment and services are exchanged a MOU may be used before a LOI is used to define pricing and terms. Also see Memorandum of Understanding (MOU).