# Registrum, £49 monthly: Company hierarchy API

> Resolve the PSC ownership chain for a company, traversing corporate entity PSCs recursively.

Registrum's company hierarchy API on its Pro plan. It costs $16.335 per 1,000 companies. Registrum's docs list 2 of the 3 key fields we check: Company, Parent.
£12.25 per 1,000 companies is $16.335 at the European Central Bank's rate of $1.3335 for £1.
We haven't run Registrum through [our company hierarchy API benchmark](https://datacircle.dev/best-company-hierarchy-api.txt) yet.
Half of the 70 plans we rank by price cost $24.75 per 1,000 companies or less. This plan costs less per 1,000 companies than 52% of the 70 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/registrum/49-monthly
- [Company hierarchy API: the 5 best providers compared](https://datacircle.dev/best-company-hierarchy-api.txt)
- Get it: https://registrum.co.uk/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing#pricing
- Request: `GET https://api.registrum.co.uk/v1/company/{company_number}/psc/chain`
- API key: with the plan, on https://registrum.co.uk/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing#pricing
- Its API docs: https://api.registrum.co.uk/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing#/PSC/get_psc_chain_v1_company__company_number__psc_chain_get
- Sold by: Registrum (https://registrum.co.uk?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 67%
- Company: ✓
- Parent: ✓

## Price

- $ per 1,000 companies: $16.335
- Per: call
- Billing: monthly
- $ a month: $65.34

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Create a webhook subscription: 25 companies watched · from the same budget: Search for companies by name · Get enriched company profile · Whole company page in one request · Get company directors with their other appointments · Map connected companies via shared directors · Get structured financial data from filed accounts · Get persons with significant control · Bulk enrich up to 50 companies in one request · Submit a batch of up to 500 companies for async enrichment · Get ECCTA identity verification compliance snapshot · Get a full Know Your Business (KYB) report

## Overage

- Units cap: hard

## In their words

- Their pitch: Resolve the PSC ownership chain for a company, traversing corporate entity PSCs recursively.

## Data

- Countries: United Kingdom
- Full family tree: no
- Keep data: no limit
- Use data: You may use the API for any lawful purpose. You may not: attempt to circumvent rate limits, resell raw API responses without transformation, use the service to build a competing API product, or use the data in a way that violates the Open Government Licence v3.0.

## Plan

- Pay: £49
- You get: 4,000 credits a month
- Enough for: 4,000 calls a month

## Rate limit

- Per day: 400
- Per second: 1.67
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: company_number. Optional: max_depth
- Method: GET
- Path: /v1/company/{company_number}/psc/chain

## About the plan

- Plan: Pro
- Who can get it: anyone

## The 28 fields the plan's answer can hold

company number, company name, owner type, owner name, owner company number, nature of control, nature of control decoded, notified on, nationality, country of residence, identity verified, identity verified on, identity verification status, identity verification deadline, registry number, registry name, registered at Companies House, country registered, legal authority, legal form, place registered, registration number, chain end reason, owners of owner, depth used, companies resolved, unresolved branches, max depth reached

## Registrum's plans (2)

- [Registrum, £49 monthly](https://datacircle.dev/company-hierarchy-apis/registrum/49-monthly/llms.txt): $16.335 per 1,000, 67% complete
- [Registrum, contact us](https://datacircle.dev/company-hierarchy-apis/registrum/contact-us/llms.txt): 67% complete

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

- `GET /v1/company/{company_number}/psc/chain`: [Registrum, £49 monthly](https://datacircle.dev/company-hierarchy-apis/registrum/49-monthly/llms.txt)

## Registrum's APIs (4)

- [Registrum: business verification API pricing, 4 plans](https://datacircle.dev/business-verification-apis/registrum/free/llms.txt)
- [Registrum: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/registrum/free/llms.txt)
- [Registrum: company enrichment API pricing, 4 plans, POST /v1/enrich](https://datacircle.dev/company-enrichment-apis/registrum/free-post-v1-enrich/llms.txt)
- [Registrum: company enrichment API pricing, 4 plans, GET /v1/company/{company_number}](https://datacircle.dev/company-enrichment-apis/registrum/free-get-v1-company-company-number/llms.txt)
- [Registrum: company enrichment API pricing, 4 plans, POST /v1/batch](https://datacircle.dev/company-enrichment-apis/registrum/free-post-v1-batch/llms.txt)
- [Registrum: company enrichment API pricing, 4 plans, GET /v1/company/{company_number}/bundle](https://datacircle.dev/company-enrichment-apis/registrum/free-get-v1-company-company-number-bundle/llms.txt)
- [Registrum: company hierarchy API pricing, 2 plans](https://datacircle.dev/company-hierarchy-apis/registrum/49-monthly/llms.txt)

## Registrum: company hierarchy API alternatives

- [Firmbase, €35 monthly](https://datacircle.dev/company-hierarchy-apis/firmbase/35-monthly/llms.txt): $13.129 per 1,000, 33% complete, 24 hours
- [Skrapp, $349 monthly, Enterprise 50K, GET /api/v3/companies/enrich](https://datacircle.dev/company-hierarchy-apis/skrapp/349-monthly-enterprise-50k-get-api-v3-companies-enrich/llms.txt): $13.96 per 1,000, 33% complete, stored
- [Katalis, £299 monthly](https://datacircle.dev/company-hierarchy-apis/katalis/299-monthly/llms.txt): $16.002 per 1,000, 67% complete
- [Apollo, $588 yearly, Basic, GET /organizations/enrich](https://datacircle.dev/company-hierarchy-apis/apollo/588-yearly-basic-get-organizations-enrich/llms.txt): $19.60 per 1,000, 100% complete, 1 month

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-06.

- https://api.registrum.co.uk/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://api.registrum.co.uk/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://api.registrum.co.uk/v1/plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://registrum.co.uk?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://registrum.co.uk/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing#pricing
- https://registrum.co.uk/bulk-enrichment?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://registrum.co.uk/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing