A CSV file tells you nothing about how it was made

Here is an uncomfortable truth about B2B marketing data: at the point of purchase, you cannot tell the difference between a meticulously researched file and one that was scraped from the internet last Tuesday.

Both arrive as a spreadsheet. Both contain names, job titles, company names, and contact details. Both look like data. The difference only reveals itself when you use it — in response rates, in goneaways, in the quality of conversations it generates, and in the reputation you build or damage with every message you send.

What "telephone researched" actually means

When we say our data is telephone researched, we mean that a member of our UK-based research team has called the organisation, spoken to a real person, and verified the details. Not once. Repeatedly, on a rolling cycle.

That call establishes who holds each decision-making role, whether they are still in post, how they prefer to receive marketing communications, and whether the company details — address, size, sector — are still accurate.

It is painstaking work. Over more than 30 years, Corpdata has invested well over a million hours of telephone research into maintaining and verifying UK B2B records. That is not a marketing claim. It is the cumulative output of a permanent, in-house research team doing the same essential work, day after day, year after year.

Why this matters to your campaign

Every inaccurate record in your data costs you money twice: once to reach it, and again in the opportunity cost of not reaching someone who might have responded. A goneaway wastes postage. A wrong name wastes credibility. An outdated job title means your carefully crafted message lands on the desk of someone who cannot act on it.

Researched data reduces this waste systematically. Our average record age is 94 days — meaning the typical contact in a Corpdata selection was verified within the last three months. That freshness is not a product feature. It is the direct result of continuous, human verification.

The guarantee behind the claim

We are confident enough in our data quality to back it with a 2-for-1 Goneaway Guarantee: if you find a company or contact has gone away, we will replace it with two records free of charge. That guarantee has been in place for years, and we still honour it, because the replacement rate is low enough to make it commercially sensible.

Data quality is invisible at the point of purchase. But its effects are measurable in every campaign you run. The effort behind the data is what separates a productive campaign from an expensive disappointment.