Most of the time you will see more visits within Google Analytics than you see identified companies in Web Visitors. That's all normal and ok! Google Analytics visits and Web Visitors identified companies are different units of measurements, they most likely differ and therefore should not be compared to each other - like you cannot compare miles to gallons.
In most cases, the reason is any of these:
Sometimes Unique Visitors in Google Analytics can only be identified as Internet Service Providers (ISPs) in Web Visitors. As Web Visitors filters out ISPs so you won't see them as companies.
Multiple visits from one company at the same location show only once – this means that multiple visits by different people in the same company, at the same location might show only as one in Web Visitors, but many in Google Analytics.
The same person can visit more than once using different browsers. These would show as more than one Unique Visitor in Google Analytics but in Web Visitors would only show as one company.
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