Marayum is a dictionary-making tool funded by the Department of Science and Technology (DOST) that can be used as an online dictionary for Philippine indigenous languages.

Marayum was developed to allow interested language communities to create an online dictionary whose content would be owned by its members and peer-reviewed by language experts. The featured entries and content is a community-based effort done by the people who speak and practice the language.

The website itself is owned and run by a research team from the University of the Philippines Diliman (UPD) and they are working in partnership with select regional universities.