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SEC API pricing and alternatives: company hierarchy API

SEC API's sitellms.txtBest company hierarchy API in 2026

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67% complete: 2 of the 3 key fields we checkSee the 3 fields
$0.00per 1,000 companiesWe rank 40 plans by price. DanskCVRAPI's DKK 599 monthly plan costs the least per 1,000 companies: $0.045.DiscoLike, Bigdata.com and Magellan Data are the best company hierarchy API providers in our benchmark.
Plan: Free one of SEC API's 4 plans
Call: POST /subsidiaries SEC API's only call for this API
API: Company hierarchy API one of SEC API's 5 APIs

About this item

  • A copy at most 1 minute old. You get hierarchies from SEC API's database.
  • 2 of the 3 key fields we check. Parent, Family tree.
  • Nothing to pay. You get 100 requests once. Calls stop once your requests run out.
  • One call. You send query to POST /subsidiaries. You can also send from, size and sort. The call returns the company's parents and family tree.
  • Who can get it: anyone, no credit card required. Keep data: no limit. Use data: with conditions.

SEC API: company hierarchy API alternatives

We list other providers' plans closest to this plan in price per 1,000 companies. Each plan in the table gives live data or data at most an hour old.

This planSEC API, freeInterzoid, free API key, POST /enrich
$ per 1,000 companies$0.00$0.00
Completeness67%67%
Billingfreefree
Pay$0$0
Enough for100 calls, oncenot published
Freshness1 minutelive
Who can get itanyone, no credit card requiredanyone

Every company hierarchy API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-28.

  1. sec-api.io
  2. sec-api.io/docs/subsidiary-api
  3. sec-api.io/policies/terms-of-service
  4. sec-api.io/pricing

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Company, not in the answer
  • Parent
  • Family tree
Price
$ per 1,000 companies$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Overage
Units caphard
Not found
$ per 1,000$0.00
In their words
Their pitchThe Subsidiary API provides access to a database of all current and historical subsidiaries belonging to publicly listed companies on US stock exchanges, from 2003 to present.
Data
Freshness1 minute
Keep datano limit
Use data"Customers enrolled in the free \"Start\" Subscription may only use the Services for personal, non-commercial purposes and may not display or distribute Provider Data to third parties in any manner." "Customer will not, and will not allow third parties under its control to: (i) copy, modify, create a derivative work of, reverse engineer, decompile, translate, disassemble, or otherwise attempt to extract any or all of the source code of the Services [...], [...] (iii) resell or distribute any or all of the Services separately from any integrated Application, (iv) create multiple Applications or Accounts to simulate or act as a single Application or Account (respectively) or otherwise access the Services in a manner intended to avoid incurring Fees or exceed usage quotas [...]" "If Customer distributes Provider Data, Customer must state that the data was provided by Provider and provide a hyperlink to https://sec-api.io." "Customer may not publicly disclose, directly or through a third party, the results of any comparative or compatibility testing, benchmarking, or evaluation (each, a \"Test\") of the Services, unless the disclosure includes all information necessary for Provider or a third party to replicate the Test and includes the right to use the information necessary to replicate the Test. [...]" Pricing page, Usage: Personal & Startups "Personal. For startups: business internal.", Business Internal Use "Business internal only.", Enterprise & Institutions "Business internal + redistribution and reselling."
Plan
Pay$0
You get100 requests
Enough for100 calls, once
Speed
Answerin the call
Median0.09 s
The call
You sendquery. Optional: from, size, sort
MethodPOST
Path/subsidiaries
About the plan
PlanFree
Who can get itanyone, no credit card required
The 9 fields the plan's answer can hold

list ID, accession number, disclosure date, parent CIK, parent ticker, parent name, subsidiary name, subsidiary jurisdiction, total results

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