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PRH Open Data: YTJ Company API (Finland)

Freeauth: noneCC-BY-4.0#osint#company-registers#finland#business-data#api#government✓ verified Nov 12, 2026

PRH Open Data: YTJ Company API (Finland)

The Finnish Patent and Registration Office (PRH) open-data APIs: basic details of Trade Register companies from the Finnish Business Information System (YTJ), registered Trade Register notifications, and financial statement data, as keyless JSON.

Required Attribution:

Required under CC BY 4.0: credit the Finnish Patent and Registration Office (PRH).

Coverage

Companies registered or pending at the Finnish Trade Register; notifications since 7 November 2014. The service page says: "The data from the PRH open data service are digital and available free of charge. The data are updated once a day." It adds: "Please note that details of private traders or companies’ email addresses and phone numbers are not available."

Verdict

Keyless JSON APIs from PRH. Licensed CC-BY-4.0: "The data are freely available as set out in the terms of the Creative Commons Attribution 4.0 International license." PRH adds: "Services based on the data are not allowed to use the PRH or Finnish Business Information System logos, or in some other manner mix up the services with the PRH’s services by using a similar layout." Rate limits: Not stated. Signal Lab links only.

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