There are a variety of synonyms that can be used in place of "am grateful." These include "appreciative," "thankful," "indebted," "obliged," "beholden," "pleased," and "gratified." Each of these words expresses a sense of gratitude or thanks, but they may have slightly different connotations or shades of meaning. For example, "appreciative" might suggest a greater sense of recognition or understanding, whereas "beholden" might imply a greater debt or obligation. It's important to choose the right synonym for your specific context and tone, but any of these words can effectively communicate a sense of appreciation or gratitude.