A letter of intent (LOI) is a non-binding term sheet setting out price, structure, and key terms, which typically grants exclusivity.
In a sale
A letter of intent is non-binding, but it usually grants the buyer exclusivity, and a term it leaves out is hard to win back once exclusivity begins. It is where price, structure, and the key terms are first written down. Comparing letters of intent on take-home and certainty, not on the headline, is how founders choose among them.
Where it comes up
The Go-To-Market Analysis (GTMA) builds the file a buyer would build on your business, before a buyer does.