In most of the cases, the reason is any of these:
- Sometimes Unique Visitors can only be identified as Internet Service Providers (ISPs) and Leadfeeder filters out ISPs so you don't see them as leads in Leadfeeder.
- Multiple visits from one company show only as one lead – this means that e.g. multiple visits by people in the same company might show only as one lead.
- The same person can visit more than once using different browsers. These would show as more than one Unique Visitor but in Leadfeeder would only show as one company.