Data quality
Where the data comes from and how it is checked.
Data quality varies by field and source. Before purchase we explain the expected coverage and the checks relevant to your order, rather than publishing a single accuracy figure. Business data decays continuously, so the honest measure is how recently a record was confirmed and what we do when it is wrong.
Sources
- Companies House
- Registered names, numbers, incorporation dates, SIC codes, filing status and registered addresses.
- Published business listings
- Trading addresses, switchboard numbers and published business email addresses.
- Business websites
- Website presence, HTTPS status, last observed update and published contact routes.
- Public review platforms
- Where a listing exists, whether it is present and its published rating and review volume.
- Our own checks
- Automated validation applied when a file is prepared. The checks used for your order are stated before you buy.
Checks applied before delivery
- Format validation
- Postcodes, phone numbers and email syntax are checked against UK formats.
- Email format screening
- Email fields are screened for invalid syntax and non-resolving domains. We do not claim deliverability.
- Duplicate removal
- Records are de-duplicated on company number, then on name and postcode.
- Dissolved company removal
- Companies recorded as dissolved or in liquidation are excluded by default.
- Release approval
- A file is only released once the order’s checks have been completed and approved.
Refresh cycles
- Company registry fields are refreshed weekly.
- Website and review signals are re-checked monthly.
- Telephone and email fields are re-verified at the point of order, not from a stale cache.
If a record is wrong
Report incorrect records within 14 days of delivery, with the rows concerned. We credit or replace any record where a supplied field is materially wrong, such as a disconnected number or an email that hard-bounces. Where a business has simply closed since we verified it, the same policy applies.
What we do not claim
- We do not claim a fixed accuracy percentage across every field and sector.
- We do not supply personal consumer data or consented marketing lists.
- We do not guarantee a named decision-maker for every record.
- Volumes shown before ordering are indicative until the list is built.