Filifactor alocis is a Gram-positive asaccharolytic, obligate anaerobic rod of the phylum Firmicutes, strongly associated with periodontitis. In this study, we performed the whole proteomic analysis of an F. alocis type strain (ATCC 35896; CCUG 47790), as well as nine clinically isolated strains at the Clinical Oral Microbiology Laboratory, Umeå University, for identification and deeper characterization of this species. Label-free quantification was used to compare the proteomic differences between different strains.