Who is the best judge of a person's abilities-the person, a knowledgeable informant, or strangers just met in a 3 -min speed date? To test this, we collected ability measures as well as self-, informant-and stranger-estimates of verbal, numerical and spatial intelligence, creativity, and intra-and interpersonal emotional competence from 175 young adults. While people themselves were the most accurate about the majority of their abilities, their verbal and spatial intelligence were only estimable by informants or strangers, respectively. These differences in accuracy were not accompanied by differences in the domains' relevance to people's self-worth or strangers' judgment certainty. These results indicate self-other knowledge asymmetries in abilities but raise questions about the reasons behind these asymmetries.