1. A computer-implemented system for grouping documents, the system comprising: a non-transitory document storage system comprising computer memory configured to store a plurality of documents, wherein each document of the plurality of documents comprises distinct character types; a computerized matching unit comprising one or more hardware processors, wherein the computerized matching unit is configured to access the non-transitory document storage system and generate: a first indicator of a common character count between a first document of the plurality of documents and a second document of the plurality of documents, wherein the common character count corresponds to a number of distinct character type occurrences in both the first document and the second document; a second indicator of a character variance count between the first document and the second document, wherein the character variance count corresponds to differences in a number of occurrences of distinct character types in both the first document and the second document; a third indicator of a missing character count between the first document and the second document, wherein the missing character count corresponds to a number of distinct character type occurrences in the first document and not in the second document; a single indicator by combining at least the first indicator, the second indicator, and the third indicator, wherein the computerized matching unit is configured to compare the single indicator to a threshold indicator to determine whether there is a match between the first document and the second document; and a grouping based at least in part on the single indicator; and a matching reporting unit configured to report the grouping generated by the computerized matching unit to a user.