Question 1

Where does CompanyStack get its data?

Accepted Answer

All data comes from official UK government sources under the Open Government Licence. We source company data from Companies House, food hygiene ratings from the Food Standards Agency, charity data from the Charity Commission, and so on. We do not scrape or use unofficial sources.

Question 2

How often is the data updated?

Accepted Answer

Company profiles are updated in real-time via the Companies House API. Enrichment datasets (financial accounts, food hygiene, ICO, etc.) are refreshed periodically from government bulk data feeds — typically weekly to monthly depending on the source.

Question 3

How do you match enrichment data to companies?

Accepted Answer

We use company registration numbers as the primary key for matching. Where government datasets include company numbers, we link directly. For datasets that use other identifiers, we employ fuzzy name matching, postcode correlation, and manual verification.

Question 4

Is this data free to use?

Accepted Answer

All underlying government data is published under the Open Government Licence v3.0, which permits free use for commercial and non-commercial purposes. CompanyStack adds value through data parsing, enrichment, cross-referencing, and API delivery. Our Free tier includes 1,000 API requests per day.

Question 5

What makes CompanyStack different from Companies House?

Accepted Answer

Companies House provides raw company data. CompanyStack parses, enriches, and cross-references that data with 16 additional government sources — giving you financial accounts, food hygiene ratings, gender pay gap reports, charity status, pollution permits, and more in a single API call.

Question 6

Can I use this data for KYC/AML compliance?

Accepted Answer

CompanyStack provides valuable due diligence data including director checks, PSC ownership, disqualified directors, gazette notices, and financial health scores. While our data supports KYC/AML processes, you should combine it with your own compliance procedures and regulatory requirements.

17 Government Data Sources,
One API Call

Companies House

Officers & Directors

Persons with Significant Control

Financial Accounts (iXBRL)

ICO Data Protection Register

London Gazette Notices

Food Standards Agency Ratings

Charity Commission

Gender Pay Gap Reports

Ofsted Inspections

CQC Healthcare Locations

Index of Multiple Deprivation

Environment Agency Pollution

Disqualified Directors

Government Contracts

No Other Platform Combines All 17 Sources

Frequently Asked Questions

17 Government Data Sources, One API Call