Systems and methods for matching and scoring sameness. In some embodiments, a computer-implemented method is provided, comprising acts of: identifying an anchor value X from the digital interaction; identifying, in a record of the digital interaction, a data structure associated with an anchor type T of the anchor value, wherein a plurality of anchor values of the anchor type T are divided into a plurality of buckets of anchor values; identifying a bucket B of the plurality of buckets of anchor values, wherein the anchor value X falls into the bucket B; and operating on the data structure associated with the anchor type T to indicate that at least one anchor value from the bucket B has been observed in connection with the digital interaction.