Why did Crustdata return fewer people than I expected?
The Crustdata help pages give 3 common reasons. The first to rule out: A person who is not yet in Crustdata's dataset comes back as not found, so lookups for very new or rare profiles can return nothing.
What causes it?
A person who is not yet in Crustdata's dataset comes back as not found, so lookups for very new or rare profiles can return nothing.
In the Crustdata help:
`not_found` means the profile is not in the dataset yet.
Person Enrichment API, read 2026-11-12.In a batch lookup, some people can come back empty while the request as a whole still succeeds, so a lower count is easy to miss.
In the Crustdata help:
If some identifiers fail to match, their `matches` array will be empty, but the request still succeeds for the others.
Person Enrichment API, read 2026-11-12.Live lookups accept fewer filters than searches of the indexed data, so the same search run both ways can return different people.
In the Crustdata help:
They take a different request format and fewer filters, so use the indexed database for searches with many conditions.
Data updates, read 2026-11-12.
How do I check it myself?
Match the entries in a response to the people you sent, since each entry stands for one identifier.
In the Crustdata help:
Each entry corresponds to one input identifier.
Person Enrichment API, read 2026-11-12.Count the entries whose matches came back empty to see how many people were not found.
In the Crustdata help:
When there is no match, the `matches` array is empty.
Person Enrichment API, read 2026-11-12.
How does Crustdata work with Feder?
- Connect Crustdata to Feder and it joins your Interest apps.
- When you connect Crustdata, Feder checks the connection straight away and shows Connected only when that check passes. If a reading cannot be taken later, Feder shows it as not read, never as zero.
Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.
See whether you can trust the numbers in Crustdata, one of your Interest apps. Feder only reads. It never changes anything in Crustdata.
What else goes wrong with these numbers?
- Why did my Crustdata company search return a different number of companies?Crustdata
- Why did my Crustdata credit use jump when I ran the same lookups?Crustdata
- Why did Google Analytics stop collecting data?Google Analytics
- Why aren't my key events showing in Google Analytics?Google Analytics
- Why does Google Analytics show (not set)?Google Analytics
See every question.
Where do these answers come from?
Every cause and check on this page comes from the Crustdata help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.