Business data services
Every file comes with what it could not fill.
First the universe is defined, then it is measured, then it is built. Values that look plausible but cannot be sourced are dropped. Output is cut to the structure your tooling expects, tested in advance.
Prior-contact exclusion
Taking out anyone already written to, from lists you supply as well as our own record.
Coverage by field
Which fields are populated and how often, reported per segment instead of as one average.
Count reconciliation
Producing the figure by the same route the final selection takes, so the two cannot disagree.