Every business of a given type, in a given place, with a verified way to reach them.
Google Maps is the most complete public directory of operating businesses that exists — better maintained than any purchased database, because the businesses maintain it themselves to be found. Category, location, phone, website, hours, rating and review count are all published, and the ones that are actually trading are the ones that keep it current.
It is the fastest route from an ideal-customer definition to a list of real companies that match it. Every HVAC contractor in three metros rated above 4.0 with more than 25 reviews and no online booking — that is a query against Maps plus a pass over each website, and it is a far better list than anything you can buy, because it was built this week to your criteria rather than two years ago to somebody else's.
Maps results are rendered dynamically, capped per query, and localised to the requesting location, so a naïve scrape returns a few dozen results and stops. The build tiles the target area into overlapping geographic cells and queries each one, which reaches the full set rather than the first page — then deduplicates across cells so a business sitting on a boundary appears exactly once.
Excel, CSV, JSON, a Google Sheet that refreshes on a schedule, a direct write into MySQL or Postgres, or a REST endpoint your own tools can query.
Five thousand verified businesses in about 24 to 48 hours is a normal run. The real ceiling is how many businesses actually match your criteria — if a niche only contains 800 genuine targets, you get 800 real ones rather than 5,000 padded with junk.
Maps itself rarely publishes them, so the build visits each business website and extracts contact addresses from there, then verifies each one against syntax, domain, MX and mailbox checks. Typical outcome is a verified email on 40 to 70 percent of the list depending on the industry — trades are lower, professional services are higher.
For some jobs that is the right answer and I will tell you so. The API is clean but it caps results per query, omits fields the map itself shows, and gets expensive at volume. Most builds use the API where it is sufficient and page extraction where it is not.
This is B2B data from public listings — business names, addresses, published phone numbers and business email addresses. I do not touch consumer PII or anything behind a login. What you may lawfully do with the list once you have it depends on where your targets are; if the list includes EU or UK businesses I will flag it, though your sending practice is a question for your lawyer rather than for me.
Most one-off lists land between $200 and $700 depending on the number of cities, categories, the depth of enrichment and whether verification is included. Recurring monthly builds are cheaper per run. Fixed price up front.