Marketing data is the information a business uses to decide who to sell to and when — who a company is (firmographic data), how to reach the people inside it (contact data), and whether it needs you right now (intent and trigger data). Get those three questions answered accurately and your outreach works. Get any of them wrong and your salespeople spend the week calling dead numbers.
Simple enough. So why is every guide to marketing data 3,000 words of jargon?
Because the guides are written by the companies selling it. Search the term and the top results belong to contact database vendors — each one defining marketing data as, conveniently, the thing they sell. None of them mention that the UK government publishes some of the most valuable marketing data in the country for free. None of them explain how fast their own product goes stale. And none of them cover the one data type that tells you when a business needs you, not just that it exists.
This guide covers all three. What marketing data actually is, the four types that matter for a UK business, where to get each one — including the free sources — and how to judge quality before you spend a pound.
What Is Marketing Data, Really?
Strip away the vendor language and marketing data answers three questions about a potential customer:
Who are they? Industry, size, location, age of the business. This tells you whether they fit your ideal customer at all. A pest controller wants restaurants and food manufacturers, not accountancy firms.
How do I reach them? Names, job titles, phone numbers, email addresses. Fit means nothing if you can’t get through to the person who signs off suppliers.
Do they need me right now? The question almost nobody’s data answers — and the one that decides whether your call lands as helpful or as noise. A restaurant that failed its hygiene inspection on Tuesday takes a pest controller’s call on Wednesday. The same restaurant six months earlier hangs up.
Most of what’s sold as marketing data answers the first two questions and ignores the third. That’s worth remembering as we go through the types, because it explains why so many purchased lists produce so few conversations.
One note on terms before we start: marketing data is the go-to-market slice of business data — the same company records, contact details and public filings, put to work finding customers rather than checking credit or vetting suppliers.
The 4 Types of Marketing Data That Matter
Vendor taxonomies list five, six, sometimes seven types of marketing data. For a UK business with a small sales team, four matter. Here they are, in order of how fast they go stale.
| Type | What it tells you | Example | Shelf life |
|---|---|---|---|
| Firmographic | Who the business is | Industry, headcount, revenue, location, incorporation date | Months to years |
| Contact | How to reach the people inside it | Names, job titles, direct phones, email addresses | Months — decays fastest |
| Intent | Whether they might be researching a purchase | Content consumption, topic surges, website visits | Days to weeks |
| Trigger | A documented event that creates a need | Failed inspection, new registration, new director, planning application | Days — act within the week |
Firmographic data is the B2B equivalent of demographics: the characteristics that describe a business rather than a person. It’s the foundation of every campaign because it defines fit. It’s also the most commoditised type — much of it sits in public registers, which matters when someone tries to charge you a premium for it.
Contact data is what most people picture when they hear “marketing data”: a spreadsheet of names and numbers. It’s also the most fragile. People change jobs, numbers get reassigned, inboxes get abandoned. A contact record is a snapshot of a moving target.
Intent data tracks what companies are researching online — which topics they’re reading about, which comparison pages they’re visiting — and infers that a purchase might be coming. It’s probabilistic: a signal that someone at the company might be interested. It’s also priced for enterprises, bundled into platforms that start around £12,000 a year, and its coverage of UK trade sectors is thin. If your buyers are restaurant owners and care home managers, intent data barely sees them.
Trigger data is the type the vendor guides skip. A trigger is a documented public event that creates a commercial need: a restaurant rated 2 or below on food hygiene, a new care provider registering with the CQC, a director appointment at a growing company, a planning application for an extension. Unlike intent data, a trigger isn’t a guess — it’s a matter of public record, with a date on it. We’ve written a full comparison of signal data versus intent data if you want the detail.
The four types aren’t competitors. Firmographics define who fits, contact data makes them reachable, and triggers tell you which of them to call this week. The businesses that waste the least money on marketing data are the ones that stop expecting one type to do all three jobs.
Where UK Businesses Actually Get Marketing Data
There are three routes, and most SMEs only ever hear about the first two.
Route 1: Buy a list. UK list brokers sell static CSVs — typically £275–£350 per thousand records — filtered by industry and location. Accurate at the moment of purchase, decaying from that point on, and usually sold to several of your competitors too. We compared the main UK B2B data providers in detail, including what each price tier actually gets you.
Route 2: Subscribe to a platform. ZoomInfo, Cognism, Apollo, Lusha and the rest. Continuously refreshed databases with search tools on top. The good ones are genuinely good — and priced for sales teams of ten or more. For a two-person sales team, £12,000–£25,000 a year is a hard number to justify, and UK coverage of niche trade sectors is thinner than the demo suggests.
Route 3: Public data. The route the comparison articles never mention, because nobody earns a commission on it. The UK government publishes machine-readable data on every registered company, every food business inspection, every care provider, and every planning application — most of it free, much of it updated daily or monthly. It’s the raw material for both firmographic and trigger data, and it’s sitting in the open.
The catch with route 3 is effort. Public data arrives as bulk files and APIs, not as a ready-to-call list. Somebody has to extract it, match it to contact details, and filter it down to the businesses that fit you. That somebody can be you, a script, or a provider who does it for a fraction of platform pricing. Either way, you should know what’s in the public record before you pay anyone for data — because a surprising amount of what’s sold is repackaged from it.
The Free Marketing Data Hiding in UK Public Records
Three sources cover most UK use cases. All are free. None require a licence fee.
Companies House. The register of every limited company in the UK. The Free Company Data Product is a downloadable snapshot of all live companies, refreshed monthly, with names, registered addresses, SIC codes (industry classification), incorporation dates and company status. There’s a free API on top for live queries. This is firmographic data for the entire UK economy at a cost of zero — and it’s the base layer we build our own Companies House data products from. Filter by SIC code and you have every registered accountant, builder or care home operator in the country.
The Food Standards Agency. Every food business inspection rating in England, Wales and Northern Ireland is published as open data, updated daily, with a free API that doesn’t even require registration. For most businesses this is trivia. For a pest controller or commercial cleaning company, a restaurant rated 0–2 is a trigger event: that business must improve before re-inspection, and it needs help now.
The Care Quality Commission. The CQC care directory lists every registered care provider in England — locations, regulated activities, bed numbers, registration dates — republished at the start of each month under the Open Government Licence. A newly registered care home has to hire staff and buy equipment from a standing start. If you’re a healthcare recruiter or medical supplier, each month’s new registrations are a list of businesses that need you, dated to the week.
Beyond those three: planning application portals (construction trades), the FCA register (financial services), and Companies House officer appointments — every new director, publicly filed. New decision-makers review suppliers in their first months, which is why we track appointments as a signal in our Director Tracker.
Notice what these sources have in common. They’re not just free firmographics — they’re dated events. A rating issued on a date. A registration completed on a date. An appointment filed on a date. That’s what makes public data the best trigger data in the country: it doesn’t just tell you a business exists, it tells you what changed and when.
How to Judge Marketing Data Quality Before You Pay
Marketing data has a property that catches every first-time buyer: it rots. B2B contact data decays at 22.5–70.3% per year. Within twelve months, 70.8% of business contacts change at least one data point — two thirds change job title or function, and 42.9% change phone number.
Run the maths on a purchased list. At the measured decay rate of roughly 2.1% per month, a list compiled a year before you bought it has lost about a quarter of its accuracy before your team makes the first call. The cost isn’t the list price — it’s the 27.3% of sales working hours burned chasing numbers that no longer connect.
So before you buy marketing data from anyone, ask three questions:
1. When was this data last verified — not collected? Collection date and verification date can be a year apart. A provider who can’t give you a verification date for your specific segment is selling you a snapshot of unknown age.
2. What event generated this record? The sharpest quality test there is. “This restaurant appeared in a directory scrape” is a weak answer. “This restaurant received a hygiene rating of 1 on 3 July, here’s the public record” is a strong one — because you can check it yourself, and because a dated event can’t be stale in the way a scraped phone number can.
3. Will they prove it before you pay? A provider confident in their data will hand you a sample to verify and sell month to month. One who needs an annual contract before you’ve tested a single record is telling you something about their churn rate.
These three questions filter out most bad providers — whether you’re buying verified lead lists, signal subscriptions, or a one-off CSV for a campaign.
The Compliance Bit (Shorter Than You Think)
UK rules on marketing data are more workable for B2B than most owners fear, but two points matter.
First, B2B marketing to corporate contacts — people at limited companies — can generally rely on legitimate interests under UK GDPR, provided the message is relevant to the person’s role. Sole traders and partnerships are treated like consumers under PECR, so emailing them cold needs consent. Any list you buy should tell you which is which.
Second, buying a list makes you the data controller. If a complaint reaches the ICO, it lands on the business that sent the message, not the broker that sold the data. “I bought it in good faith” is not a defence — you’re expected to have done due diligence on the supplier. That’s another argument for data built from public records: the provenance is checkable, right down to the government register each record came from. We’ve covered the full rules in our guide to compliant B2B data.
Which Type of Marketing Data Does Your Business Need?
Match the data to the sales problem, not the other way round.
You don’t know who’s out there. Start with firmographics. A filtered slice of the Companies House register — by SIC code, region and company age — maps your market for the cost of a download, or a small fee if you want it cleaned and enriched.
You know who fits but can’t reach them. You need contact data, and freshness is everything. Buy verified, buy recent, and buy in quantities your team can work through before it decays.
You can reach them but the timing is always wrong. This is the most common problem and the least diagnosed. Your salespeople aren’t bad at cold calling — they’re calling businesses that have no reason to switch supplier this month. That’s a trigger data problem. Find the public event that predicts demand for your service, and call the businesses that just experienced it.
Most guides to marketing data end by telling you to buy a bigger database. Ours ends differently: the scarcest thing in your pipeline isn’t names. Any register can give you names. It’s knowing which twenty of those businesses need you this week — and the answer to that is sitting in public data, timestamped, waiting for whoever checks first.
That’s the data we sell: not lists, signals. If you want to see what a trigger event looks like in your sector, we’ll send you a free sample — real businesses, real events, real dates — and you can verify every record against the public register yourself.