# Sirenic, free: Similar companies API

> Find French companies that look like your best customers: give 2 to 5 customer SIRENs (?exemples=), optionally a region or departement, and get the first page of 100 active legal persons matching the profile deduced from them (NAF codes, workforce brackets, legal forms, creation dates, area), customers excluded, with the exact total.

Sirenic's Free quota plan for the similar companies API costs $0.00 per 1,000 companies. Sirenic's docs list 1 of the 13 fields on our checklist: Revenue.
You get up to 150 pages a month.
We haven't run Sirenic through [our similar companies API benchmark](https://datacircle.dev/best-similar-companies-api.txt) yet.
This plan is free. We rank 146 plans for similar companies APIs by price. Half the plans cost $1.685 per 1,000 companies or less. [See how many similar companies API plans are free.](https://datacircle.dev/best-similar-companies-api.txt)
[PublicWWW's $499 monthly plan](https://datacircle.dev/similar-company-apis/publicwww/499-monthly/llms.txt) is the cheapest paid plan 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/249-monthly-growth-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/sirenic/free
- [Similar companies API: the best of 20+ providers compared](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://api.sirenic.eu/offres?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Request: `GET https://api.sirenic.eu/v1/prospection/sosies`
- API key: with the plan, on https://api.sirenic.eu/offres?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Its API docs: https://api.sirenic.eu/api/prospection-par-sosies-vos-meilleurs-clients?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Sold by: Sirenic (https://api.sirenic.eu?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 8%
- Revenue: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 100
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: 123 other calls: 150 free calls a month

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Find French companies that look like your best customers: give 2 to 5 customer SIRENs (?exemples=), optionally a region or departement, and get the first page of 100 active legal persons matching the profile deduced from them (NAF codes, workforce brackets, legal forms, creation dates, area), customers excluded, with the exact total.

## Data

- Countries: France
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- Enough for: 150 pages a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: exemples. Optional: region, departement
- Method: GET
- Path: /v1/prospection/sosies

## About the plan

- Plan: Free quota
- Who can get it: anyone with an account

## The 16 fields the plan's answer can hold

SIREN, legal name, legal form, NAF code, workforce bracket, status, creation date, head office postal code, head office city, head office department, head office region, fiscal year closing date, revenue, net income, total results, deduced profile

## Sirenic's plans (2)

- [Sirenic, free](https://datacircle.dev/similar-company-apis/sirenic/free/llms.txt): $0.00 per 1,000, 8% complete
- [Sirenic, pay as you go](https://datacircle.dev/similar-company-apis/sirenic/pay-as-you-go/llms.txt): $0.225 per 1,000, 8% complete

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

- `GET /v1/prospection/sosies`: [Sirenic, free](https://datacircle.dev/similar-company-apis/sirenic/free/llms.txt)

## Sirenic's APIs (4)

- [Sirenic: similar companies API pricing, 2 plans](https://datacircle.dev/similar-company-apis/sirenic/free/llms.txt)
- [Sirenic: company enrichment API pricing, 2 plans, GET /v1/entreprise/{siren}](https://datacircle.dev/company-enrichment-apis/sirenic/free-quota-get-v1-entreprise-siren/llms.txt)
- [Sirenic: company enrichment API pricing, 2 plans, GET /v1/eu/entreprise/{pays}/{id}](https://datacircle.dev/company-enrichment-apis/sirenic/free-quota-get-v1-eu-entreprise-pays-id/llms.txt)
- [Sirenic: business verification API pricing, 2 plans, GET /v1/kyb/{siren}](https://datacircle.dev/business-verification-apis/sirenic/free-quota-get-v1-kyb-siren/llms.txt)
- [Sirenic: business verification API pricing, 2 plans, GET /v1/eu/recherche](https://datacircle.dev/business-verification-apis/sirenic/free-quota-get-v1-eu-recherche/llms.txt)
- [Sirenic: business verification API pricing, 2 plans, GET /v1/recherche](https://datacircle.dev/business-verification-apis/sirenic/free-quota-get-v1-recherche/llms.txt)
- [Sirenic: company discovery API pricing, 2 plans, GET /v1/entreprises/requete/lister](https://datacircle.dev/company-discovery-apis/sirenic/free-quota-get-v1-entreprises-requete-lister/llms.txt)
- [Sirenic: company discovery API pricing, 2 plans, GET /v1/prospection](https://datacircle.dev/company-discovery-apis/sirenic/free-quota-get-v1-prospection/llms.txt)

## Sirenic: similar companies API alternatives

- [gtm-api.com, $468 yearly](https://datacircle.dev/similar-company-apis/gtm-api-com/468-yearly/llms.txt): $0.208 per 1,000, 31% complete, live
- [Tomba, $22,491 yearly](https://datacircle.dev/similar-company-apis/tomba/22491-yearly/llms.txt): $0.214 per 1,000, 15% complete, stored
- [Implisense, €49 pack, 500 Implicents, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/49-pack-500-implicents-post-v2-similar/llms.txt): $0.221 per 1,000, 15% complete, 1 day
- [AI Ark, $4,449 monthly](https://datacircle.dev/similar-company-apis/ai-ark/4449-monthly/llms.txt): $0.223 per 1,000, 77% complete, 30 days

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

- https://api.sirenic.eu/api/prospection-par-sosies-vos-meilleurs-clients?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://api.sirenic.eu/en?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://api.sirenic.eu/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://api.sirenic.eu/mentions-legales?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://api.sirenic.eu/offres?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://api.sirenic.eu/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing