What is the difference in an indentured servant and a vassal?

An indentured servant is a laborer who works for a specified period under a contract called an indenture. A vassal, on the other hand, is a person who pledges loyalty and military service to a lord in exchange for land and protection. Indentured servants typically worked for a set amount of time to pay off debts or secure passage to a new country, while vassals served as part of a feudal system and owed allegiance to a noble or king.