Most lead purchases fail on one point: the phone number does not belong to a person. Company main lines are cheap to collect and look valid in a spreadsheet, so they fill out files sold by contact count.

A callable record is the unit worth paying for. That means a named person, a title that matches the buying role, an employer that matches the profile, a verified work email and a phone that rings that individual.

Judged that way, the cheap file is usually the expensive one. Half the rows never reach anyone, so the effective price per usable contact doubles before a rep has made a single call.

A one-off purchase suits a single campaign, a test market or an event follow-up. You buy once, work it, and it is gone.

Continuous supply suits a team calling every day. New contacts arrive at the pace reps can work them, the whole account history is deduplicated, and nobody is calling last quarter's export.

Data also decays at two to three percent a month, so a large static file is worth less every week it sits. Fresh delivery sidesteps that entirely.

Seat and credit platforms run roughly $100 to $200 a user per month plus credit bundles, which suits a team that enjoys building lists. Done-for-you delivery removes the seat and the search work and charges by volume.

At LeadNumbers the effective rate runs from about 24.5 cents on the entry plan down to 8 cents at 10,000 a month. Every one of those records carries a phone that reaches a person.

Compare vendors on cost per conversation rather than cost per row, and the ranking changes quickly.

Ask for a sample against your real profile, not a generic file. Five records is enough to see whether the titles, employers and geography hold.

Sort the sample by phone number. Repeats mean shared switchboards. Then call ten and count how many reach the named person.

Finally, ask what happens when a record is wrong. A vendor with no replacement policy is telling you something about its own confidence.