Finding businesses in a broad category is usually only the first step. If you need companies that offer a particular service, directory categories and search results can provide candidates, but their websites often need checking before the list is useful.
The workflow is discovery, identity resolution, service verification, exclusions, and delivery. Each step answers a different question.
Describe the service in the customer's language
List the phrases businesses use for the service, including relevant synonyms and exclusions. “Commercial HVAC maintenance” is different from equipment sales, residential repair, and a blog discussing commercial buildings.
Specify whether you need a currently advertised service, evidence of completed projects, or a particular certification. These require different sources and levels of verification. A service mention should not automatically establish a license or qualification.
For an illustrative supplier search, the requirement might be businesses advertising commercial refrigeration maintenance within an agreed service area, excluding manufacturers and residential-only providers.
Discover candidates from more than one route
Potential sources include business directories, trade association listings, search results, and client-supplied company lists. Select sources based on coverage and suitable access, rather than assuming one platform contains every relevant business.
Record which source found each candidate. If a category is sparse, that may reflect the source's coverage or wording rather than an absence of businesses. Geographic queries also need care: a business located outside a city may still serve it.
Search-result counts are not a reliable total-addressable-market measurement. Use collection coverage notes and known exclusions when describing the output.
Verify the service on the company website
Look for dedicated service pages, service-area pages, relevant project descriptions, and clear company statements. Record the supporting URL and what it establishes. Reject keyword matches that describe someone else's business or an unrelated educational topic.
Separate service availability from company location. A registered address, a storefront, and an advertised service territory can describe different things. Preserve that distinction in the delivered fields.
If evidence is unclear, return an unknown or review status. Do not invent an offering because the business belongs to a broad industry category.
Resolve duplicates at the intended level
One company may appear in several directories or under several branches. Decide whether the list should contain one company, one website, or one operating location. Preserve useful branch detail even if outreach will happen at company level.
Be cautious with shared franchise domains and brands operating through several legal entities. Automatic domain deduplication can remove records you intended to keep.
Deliver an inspectable list
Useful fields include business name, domain, location, relevant service, qualification status, supporting URL, source, and checked date. Add published company contact details only where available and relevant to the brief.
Review a representative sample before expanding collection. It is easier to correct a definition on a small sample than to clean thousands of poorly matched companies later.
See Google Maps business discovery and our broader lead data service. Send the service, territory, and exclusions you have in mind to define the search.
