# Firmbase, €15 monthly: Company hierarchy API

> Participating interests as filed: the held company's enterprise number, legal form, the percentage held directly and through subsidiaries, and its equity and net result where the filing states them.

Firmbase's company hierarchy API on its Start plan. It costs $5.627 per 1,000 companies. It returns 1 of the 3 key fields we check: Company.
€5.00 per 1,000 companies is $5.627 at the European Central Bank's rate of $1.1253 for €1.
We haven't run Firmbase through [our company hierarchy API benchmark](https://datacircle.dev/best-company-hierarchy-api.txt) yet.
Half of the 59 plans we rank by price cost $24.75 per 1,000 companies or less. This plan costs less per 1,000 companies than 62% of the 59 plans.
[DanskCVRAPI's DKK 599 monthly plan](https://datacircle.dev/company-hierarchy-apis/danskcvrapi/dkk-599-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: $0.045. DanskCVRAPI's plan covers companies in Denmark only.
[GlobalEntity API's €59 monthly plan](https://datacircle.dev/company-hierarchy-apis/globalentity-api/59-monthly/llms.txt) covers any number of companies in 54 countries only. GlobalEntity API's €59 monthly plan costs less up front than DanskCVRAPI's DKK 599 monthly plan.
[DiscoLike](https://datacircle.dev/company-hierarchy-apis/discolike/99-monthly/llms.txt), [Bigdata.com](https://datacircle.dev/company-hierarchy-apis/bigdata-com/50-monthly/llms.txt) and [Magellan Data](https://datacircle.dev/company-hierarchy-apis/magellan-data/375-pack-25000-credits-post-v1-corporate-families/llms.txt) are the best company hierarchy API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-hierarchy-apis/firmbase/15-monthly
- [Company hierarchy API: the 5 best providers compared](https://datacircle.dev/best-company-hierarchy-api.txt)
- Get it: https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- Request: `GET https://api.firmbase.be/v1/companies/{number}/participations`
- API key: with the plan, on https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- Its API docs: https://firmbase.be/en/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing#get-v1-companies-number-participations
- Sold by: Firmbase (https://firmbase.be?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 33%
- Company: ✓

## Price

- $ per 1,000 companies: $5.627
- Per: call
- Billing: monthly
- $ a month: $16.88

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: 53 other calls

## Overage

- Units cap: hard

## In their words

- Their pitch: Participating interests as filed: the held company's enterprise number, legal form, the percentage held directly and through subsidiaries, and its equity and net result where the filing states them.

## Data

- Freshness: 24 hours
- Countries: Belgium
- Full family tree: no
- Keep data: no limit
- Use data: Use the API for your own product or internal work, within your plan. You may not bypass the limits, overload the service, impersonate the KBO or the National Bank, or republish the data as a competing API. Caching responses for your own users is allowed. [...] The API is for your own product or your own internal work, not for reselling requests or information. You may not share your key, sub-license it or let third parties use it, and you may not offer API responses as a service, a database or an extract to parties outside your own organisation. Showing the data to your own users inside your own product is allowed: that is what the API is for. Querying systematically in order to rebuild a copy of the register or of the annual accounts is not.

## Plan

- Pay: €15
- You get: 100 requests a day
- Enough for: 100 calls a day

## Rate limit

- Per day: 100
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number. Optional: lang, history
- Method: GET
- Path: /v1/companies/{number}/participations

## About the plan

- Plan: Start
- Who can get it: anyone, a payment card is entered at the start of the 7-day trial

## The 21 fields the plan's answer can hold

company number, company name, country, city, postcode, legal form, legal form code, nature of holding, identifier, percentage held directly, percentage held through subsidiaries, number of shares, equity, net result, currency, period end, accounts date, filing deposit ID, held by, result count, snapshot

## Firmbase's plans (9)

- [Firmbase, €15 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/15-monthly/llms.txt): $5.627 per 1,000, 33% complete, 24 hours
- [Firmbase, €25 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/25-monthly/llms.txt): $9.377 per 1,000, 33% complete, 24 hours
- [Firmbase, €29 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/29-monthly/llms.txt): $0.163 per 1,000, 33% complete, 24 hours
- [Firmbase, €35 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/35-monthly/llms.txt): $13.129 per 1,000, 33% complete, 24 hours
- [Firmbase, €79 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/79-monthly/llms.txt): $0.089 per 1,000, 33% complete, 24 hours
- [Firmbase, €149 yearly](https://datacircle.dev/company-hierarchy-apis/firmbase/149-yearly/llms.txt): $4.594 per 1,000, 33% complete, 24 hours
- [Firmbase, €249 yearly](https://datacircle.dev/company-hierarchy-apis/firmbase/249-yearly/llms.txt): $7.677 per 1,000, 33% complete, 24 hours
- [Firmbase, €349 yearly](https://datacircle.dev/company-hierarchy-apis/firmbase/349-yearly/llms.txt): $10.76 per 1,000, 33% complete, 24 hours
- [Firmbase, contact us](https://datacircle.dev/company-hierarchy-apis/firmbase/contact-us/llms.txt): 33% complete, 24 hours

## Firmbase's calls for this API (1)

- `GET /v1/companies/{number}/participations`: [Firmbase, €15 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/15-monthly/llms.txt)

## Firmbase's APIs (5)

- [Firmbase: business verification API pricing, 11 plans](https://datacircle.dev/business-verification-apis/firmbase/free/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, POST /v1/companies/batch](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-post-v1-companies-batch/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/companies/{number}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-companies-number/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/entities/{number}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-entities-number/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/vat/{vat}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-vat-vat/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/autocomplete](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-autocomplete/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/companies](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-companies/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/entities/search](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-entities-search/llms.txt)
- [Firmbase: company hierarchy API pricing, 9 plans](https://datacircle.dev/company-hierarchy-apis/firmbase/15-monthly/llms.txt)
- [Firmbase: people search API pricing, 9 plans, GET /v1/companies/{number}/officers](https://datacircle.dev/people-search-apis/firmbase/15-monthly-start-get-v1-companies-number-officers/llms.txt)
- [Firmbase: people search API pricing, 9 plans, GET /v1/officers](https://datacircle.dev/people-search-apis/firmbase/15-monthly-start-get-v1-officers/llms.txt)

## Firmbase: company hierarchy API alternatives

- [SEC API, free](https://datacircle.dev/company-hierarchy-apis/sec-api/free/llms.txt): $0.00 per 1,000, 67% complete, 1 minute
- [Interzoid, free API key, GET /getparentcompanyinfo](https://datacircle.dev/company-hierarchy-apis/interzoid/free/llms.txt): $0.00 per 1,000, 67% complete, live
- [Sumble, free](https://datacircle.dev/company-hierarchy-apis/sumble/free/llms.txt): $0.00 per 1,000, 67% complete, 1 day
- [Charity Commission, free, Register of Charities, GET /linkedcharity/{RegisteredNumber}/{suffix}](https://datacircle.dev/company-hierarchy-apis/charity-commission/free-register-of-charities-get-linkedcharity-registerednumber-suffix/llms.txt): $0.00 per 1,000, 0% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://api.firmbase.be/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://firmbase.be/en/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://firmbase.be/en/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://firmbase.be/en/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing