Automated hashtag suggestions are provided to categorize a communication. A communication application initiates operations to categorize a communication in response to a detected input to categorize the communication with a hashtag. A hashtag source is queried for suggested hashtag(s). The suggested hashtag(s) is received from the hashtag source and stored in a hashtag cache. The suggested hashtag(s) is also presented upon retrieval of the suggested hashtag(s) from the hashtag cache.