# OpenMercantil, free: Similar companies API

> Empresas publicadas de la misma provincia y división CNAE de 2 dígitos, ordenadas por proximidad de actividad BORME. No implica relación.

OpenMercantil's similar companies API on its Gratuito plan. It costs $0.00 per 1,000 companies. OpenMercantil's docs list none of the 13 key fields we check: Match, Description, Industry and type, Images and 9 more.
We ran OpenMercantil in [our similar companies API benchmark](https://datacircle.dev/best-similar-companies-api.txt). We didn't score any OpenMercantil plan.
This plan is free. We rank 135 plans for similar companies APIs by price. Half the plans cost $1.33 per 1,000 companies or less.
[PublicWWW's $499 monthly plan](https://datacircle.dev/similar-company-apis/publicwww/499-monthly/llms.txt) costs the least per 1,000 companies: $0.000055. PublicWWW charges for each page of results. We count 1,000,000 companies on each page to get the $0.000055 price.
[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 up front than PublicWWW's $499 monthly plan.
[ScrapeAtlas](https://datacircle.dev/similar-company-apis/scrapeatlas/19-pack/llms.txt), [LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt) and [Tomba](https://datacircle.dev/similar-company-apis/tomba/449-monthly/llms.txt) are the best similar companies API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/similar-company-apis/openmercantil/free
- [Similar companies API: the best of 20+ providers compared](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://openmercantil.es/precios?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Request: `GET https://openmercantil.es/api/v1/company/{slug}/similar`
- API key: not needed
- Its API docs: https://openmercantil.es/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing#/Companies/getCompanyBySlugSimilar
- Sold by: OpenMercantil (https://openmercantil.es?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 0%

## Price

- $ per 1,000 companies: $0.00
- Per: page of 20
- Billing: free

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Empresas publicadas de la misma provincia y división CNAE de 2 dígitos, ordenadas por proximidad de actividad BORME. No implica relación.

## Data

- Countries: Spain
- Keep data: no limit
- Use data: 2. Uso permitido: Consulta personal o profesional de fichas individuales de empresas y personas. Uso programático de la API pública respetando el rate-limit (60 req/min por IP). Reutilización de los datos bajo licencia CC BY 4.0 citando la fuente: BOE/BORME y OpenMercantil como intermediario técnico. Inclusión de fragmentos en investigación, periodismo y análisis con la atribución correspondiente. 3. Uso prohibido: Scraping masivo o automatizado por encima del rate-limit publicado. Reventa o redistribución del dataset presentándolo como «fuente oficial». Construcción de perfiles comerciales o publicitarios sobre personas físicas (RGPD art. 5.1.b). Cualquier intento de explotar vulnerabilidades, evadir limitaciones o degradar el servicio. Uso del servicio para finalidades ilícitas o contrarias al ordenamiento jurídico español.

## Plan

- Pay: €0
- You get: 200 requests a day
- Enough for: 200 pages a day

## Rate limit

- Per day: 200
- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: slug. Optional: limit
- Method: GET
- Path: /api/v1/company/{slug}/similar

## About the plan

- Plan: Gratuito
- Who can get it: anyone

## The 12 fields the plan's answer can hold

slug, legal name, CIF, province, CNAE code, CNAE section, registered capital, first seen, last seen, acts count, matched alias, aliases

## OpenMercantil's plans (4)

- [OpenMercantil, free](https://datacircle.dev/similar-company-apis/openmercantil/free/llms.txt): $0.00 per 1,000, 0% complete
- [OpenMercantil, €57 monthly](https://datacircle.dev/similar-company-apis/openmercantil/57-monthly/llms.txt): $0.021 per 1,000, 0% complete
- [OpenMercantil, €197 monthly](https://datacircle.dev/similar-company-apis/openmercantil/197-monthly/llms.txt): $0.0074 per 1,000, 0% complete
- [OpenMercantil, contact us](https://datacircle.dev/similar-company-apis/openmercantil/contact-us/llms.txt): 0% complete

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

- `GET /api/v1/company/{slug}/similar`: [OpenMercantil, free](https://datacircle.dev/similar-company-apis/openmercantil/free/llms.txt)

## OpenMercantil's APIs (2)

- [OpenMercantil: similar companies API pricing, 4 plans](https://datacircle.dev/similar-company-apis/openmercantil/free/llms.txt)
- [OpenMercantil: business verification API pricing, 4 plans, GET /api/v1/company/{slug}](https://datacircle.dev/business-verification-apis/openmercantil/free-gratuito-get-api-v1-company-slug/llms.txt)
- [OpenMercantil: business verification API pricing, 4 plans, GET /api/v1/search](https://datacircle.dev/business-verification-apis/openmercantil/free-gratuito-get-api-v1-search/llms.txt)

## OpenMercantil: similar companies API alternatives

- [Cleanlist, $89 monthly](https://datacircle.dev/similar-company-apis/cleanlist/89-monthly/llms.txt): $0.00034 per 1,000, 15% complete
- [PublicWWW, $49 pack](https://datacircle.dev/similar-company-apis/publicwww/49-pack/llms.txt): $0.0049 per 1,000, 15% complete, stored
- [CompanyPulse, £99 monthly](https://datacircle.dev/similar-company-apis/companypulse/99-monthly/llms.txt): $0.0088 per 1,000, 0% complete
- [ScrapeAtlas, $249 pack](https://datacircle.dev/similar-company-apis/scrapeatlas/249-pack/llms.txt): $0.013 per 1,000, 8% 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 2026-11-06.

- https://openmercantil.es/api/documentacion?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://openmercantil.es/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://openmercantil.es/precios?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://openmercantil.es/reutilizacion-y-atribucion?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://openmercantil.es/terminos-de-uso?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://openmercantil.es/uso-razonable?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing