# Extruct, free, GET /v1/companies/{company_identifier}/similar: Similar companies API

> Find companies similar to a reference company.

Extruct's similar companies API on its Free plan. It costs $0.00 per 1,000 companies. It returns 6 of the 13 key fields we check: Match, Description, Industry and type, Employees, Headquarters, Domain.
We rank 107 plans by price. [Cleanlist's $89 monthly plan](https://datacircle.dev/similar-company-apis/cleanlist/89-monthly/llms.txt) costs the least per 1,000 companies: as little as $0.00034. Cleanlist's $89 monthly plan covers up to 2,592,000 pages a month at no extra cost. Each page holds 100 companies.
[ZoomInfo's $45 pack](https://datacircle.dev/similar-company-apis/zoominfo/45-pack/llms.txt) covers any number of companies. ZoomInfo's $45 pack costs less to start than Cleanlist's $89 monthly plan.
[LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt), [Extruct](https://datacircle.dev/similar-company-apis/extruct/149-monthly-pro-post-v1-companies-company-identifier-similar/llms.txt) and [DiscoLike](https://datacircle.dev/similar-company-apis/discolike/99-monthly/llms.txt) are the best similar companies API providers in our benchmark.

- This page: https://datacircle.dev/similar-company-apis/extruct/free-get-v1-companies-company-identifier-similar
- [Best similar companies API in 2026](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://www.extruct.ai/pricing
- Request: `GET https://api.extruct.ai/v1/companies/{company_identifier}/similar`
- API key: with the plan, on https://www.extruct.ai/pricing
- Its API docs: https://docs.extruct.ai/api-reference/lookalike-search
- Sold by: Extruct (https://www.extruct.ai)
- Checked: 2026-10-20

## In the answer

- Completeness: 46%
- Match: ✓
- Description: ✓
- Industry and type: ✓
- Employees: ✓
- Headquarters: ✓
- Domain: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 25
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Semantic search

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Find companies similar to a reference company.

## Data

- Freshness: stored
- Keep data: "As a user of the Services, you agree not to: [...] Systematically retrieve data or other content from the Services to create or compile, directly or indirectly, a collection, compilation, database, or directory without written permission from us." "Customer shall not [...] (c) use the Service to build or train a competing database, model, or service."
- Use data: "We grant you a non-exclusive, non-transferable, revocable license to: access the Services, and download or print a copy of any portion of the Content to which you have properly gained access, solely for your internal business or professional use. Except as set out in this section or elsewhere in our Legal Terms, no part of the Services and no Content or Marks may be copied, reproduced, aggregated, republished, uploaded, posted, publicly displayed, encoded, translated, transmitted, distributed, sold, licensed, or otherwise exploited for any commercial purpose whatsoever, without our express prior written permission." "The Services may not be used in connection with any commercial endeavors except those that are specifically endorsed or approved by us." "Customer shall not [...] (b) resell, sublicense, publish, or redistribute data obtained from the Service in bulk, or (c) use the Service to build or train a competing database, model, or service."

## Plan

- Pay: $0
- You get: 25 credits a month
- Enough for: 25 pages a month
- Expires: unused credits do not roll over: credits reset each month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: company_identifier. Optional: filters, offset, limit
- Method: GET
- Path: /v1/companies/{company_identifier}/similar

## About the plan

- Plan: Free
- Who can get it: anyone at least 18 years old, for internal business or professional use

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

company ID, domain, name, short description, full description, products and services, use cases, target audience, other considerations, founded year, employee range, country, state, city, full address, social profiles, website authority score, website authority tier, website authority tier label, relevance score, reference company

## Extruct's plans (4)

- [Extruct, free, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/free-get-v1-companies-company-identifier-similar/llms.txt): $0.00 per 1,000, 46% complete, stored
- [Extruct, $49 monthly, Starter, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/49-monthly-starter-get-v1-companies-company-identifier-similar/llms.txt): $0.392 per 1,000, 46% complete, stored
- [Extruct, $149 monthly, Pro, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/149-monthly-pro-get-v1-companies-company-identifier-similar/llms.txt): $0.298 per 1,000, 46% complete, stored
- [Extruct, contact us, Team & Enterprise, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/contact-us-team-enterprise-get-v1-companies-company-identifier-similar/llms.txt): 46% complete, stored

## Extruct's calls for this API (2)

- `GET /v1/companies/{company_identifier}/similar`: [Extruct, free, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/free-get-v1-companies-company-identifier-similar/llms.txt)
- `POST /v1/companies/{company_identifier}/similar`: [Extruct, free, POST /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/free-post-v1-companies-company-identifier-similar/llms.txt)

## Extruct's APIs (3)

- [Extruct: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/extruct/free/llms.txt)
- [Extruct: similar companies API pricing, 4 plans, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/free-get-v1-companies-company-identifier-similar/llms.txt)
- [Extruct: company discovery API pricing, 4 plans, GET /v1/companies/search](https://datacircle.dev/company-discovery-apis/extruct/free-get-v1-companies-search/llms.txt)
- [Extruct: company discovery API pricing, 4 plans, POST /v1/companies/search](https://datacircle.dev/company-discovery-apis/extruct/free-post-v1-companies-search/llms.txt)

## Extruct: similar companies API alternatives

- [Tomba, $1,791 yearly](https://datacircle.dev/similar-company-apis/tomba/1791-yearly/llms.txt): $0.298 per 1,000, 15% complete, stored
- [The Companies API, $2,950 yearly](https://datacircle.dev/similar-company-apis/the-companies-api/2950-yearly/llms.txt): $0.983 per 1,000, 92% complete, stored
- [CompanyEnrich, $549 monthly, Scale, POST /companies/similar, Find similar](https://datacircle.dev/similar-company-apis/companyenrich/549-monthly-scale-post-companies-similar-find-similar/llms.txt): $5.49 per 1,000, 85% complete, stored
- [Ocean.io, $3,000 yearly](https://datacircle.dev/similar-company-apis/ocean-io/3000-yearly/llms.txt): $10.00 per 1,000, 92% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

- https://docs.extruct.ai/api-guides/search/lookalike-search.md
- https://docs.extruct.ai/api-reference/introduction.md
- https://docs.extruct.ai/api-reference/lookalike-search
- https://docs.extruct.ai/llms.txt
- https://www.extruct.ai
- https://www.extruct.ai/pricing
- https://www.extruct.ai/terms-of-service/