# PRH, free: Business verification API

> Search for basic details of companies in the Finnish Business Information System at ytj.fi. The companies are registered at the Finnish Trade Register.

PRH's business verification API on its Free plan. It costs $0.00 per 1,000 companies. It returns 6 of the 11 key fields we check: Registered name, Entity number, Entity type, Status, Formation date, Principal address.
You get as many calls as you like.
Half of the 523 plans we rank by price cost $5.00 per 1,000 companies or less. This plan and 37 others tie for the lowest price per 1,000 companies of the 523 plans.

- This page: https://datacircle.dev/business-verification-apis/prh/free
- Get it: https://avoindata.prh.fi/en/info/swagger-ui
- Request: `GET https://avoindata.prh.fi/opendata-ytj-api/v3/companies`
- API key: not needed
- Its API docs: https://avoindata.prh.fi/en/ytj/swagger-ui
- Sold by: PRH (https://avoindata.prh.fi/en)
- Checked: 2026-10-31

## In the answer

- Completeness: 55%
- Registered name: ✓
- Entity number: ✓
- Entity type: ✓
- Status: ✓
- Formation date: ✓
- Principal address: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Search for basic details of companies in the Finnish Business Information System at ytj.fi. The companies are registered at the Finnish Trade Register.

## Data

- Freshness: 1 day
- Keep data: no limit
- Use data: "The data are freely available as set out in the terms of the Creative Commons Attribution 4.0 International license. Mention the original source when you use the data. 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. [...] Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use."

## Plan

- Pay: $0
- Enough for: no limit

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: name, location, businessId, companyForm, mainBusinessLine, registrationDateStart, registrationDateEnd, postCode, businessIdRegistrationStart, businessIdRegistrationEnd, page
- Method: GET
- Path: /companies

## About the plan

- Plan: Free
- Who can get it: anyone

## The 57 fields the plan's answer can hold

total results, business ID, business ID registration date, business ID source, EU ID, EU ID source, name, name type, name registration date, name end date, name version, name source, main business line code, main business line description, main business line code set, main business line registration date, main business line source, website URL, website registration date, website source, company form type, company form description, company form registration date, company form end date, company form version, company form source, company situation type, company situation registration date, company situation end date, company situation source, registered entry type, registered entry description, registered entry registration date, registered entry end date, registered entry register, registered entry authority, address type, street, post code, post office city, municipality code, language code, post office box, building number, entrance, apartment number, apartment ID suffix, care of, country, free address line, address registration date, address source, trade register status, status, registration date, end date, last modified

## PRH's plans (1)

- [PRH, free](https://datacircle.dev/business-verification-apis/prh/free/llms.txt): $0.00 per 1,000, 55% complete, 1 day

## PRH's calls (1)

- `GET /companies`: [PRH, free](https://datacircle.dev/business-verification-apis/prh/free/llms.txt)

## PRH's APIs (1)

- [PRH: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/prh/free/llms.txt)

## PRH: business verification API alternatives

- [OpenSOSData, free, POST /v1/lookup](https://datacircle.dev/business-verification-apis/opensosdata/free-post-v1-lookup/llms.txt): $0.00 per 1,000, 100% complete, live
- [RIK, free](https://datacircle.dev/business-verification-apis/rik/free/llms.txt): $0.00 per 1,000, 45% complete, live
- [Scavio, free](https://datacircle.dev/business-verification-apis/scavio/free/llms.txt): $0.00 per 1,000, 45% complete, live
- [RPO, free](https://datacircle.dev/business-verification-apis/rpo/free/llms.txt): $0.00 per 1,000, 36% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-31.

- https://avoindata.prh.fi/en
- https://avoindata.prh.fi/en/info/swagger-ui
- https://avoindata.prh.fi/en/ytj/swagger-ui
- https://avoindata.prh.fi/opendata-ytj-api/v3/companies?name=nokia
- https://avoindata.prh.fi/opendata-ytj-api/v3/schema?lang=en
- https://creativecommons.org/licenses/by/4.0/deed.en