Why finding the SIREN of an e-commerce website is difficult

The natural first instinct is to look up the server IP address and cross-reference it with a company database. This approach does not work.

On Shopify, WooCommerce, PrestaShop Cloud or any other SaaS solution, the server IP belongs to the platform's infrastructure — not to the merchant. A Shopify store at mystore.fr shares the same IP as thousands of other Shopify stores. The IP tells you nothing about the legal entity operating the site.

The second approach is to search for a textual mention of the SIREN or SIRET on the page. This is closer to the truth, but insufficient: the pages of an e-commerce site contain dozens of numeric codes (product references, postal codes, VAT numbers, APE codes, internal identifiers) that look like a SIREN without being one. A simple 9-digit regex produces unusable results.

The 4-step method

The correct method relies on four successive steps.

Step 1 — Verify the destination domain. First, confirm that the URL being analysed is the actual destination domain and not an alias or parked domain. A domain that redirects to another belongs to the entity that owns the target domain.

Step 2 — Extract legal notices and T&Cs. Legal notices are mandatory for any French commercial website. They must contain the company name, SIREN or SIRET, and the registered office address. These are the pages to analyse first: /mentions-legales, /cgv, /legal, footer links.

Step 3 — Identify the SIREN using AI, filtering out false positives. Once the legal pages are extracted, identifying the SIREN requires distinguishing the actual identifier from the other numeric codes present. A language model trained on thousands of French legal notice examples identifies the SIREN with far greater precision than a simple regex.

Step 4 — Cross-reference with the INPI. The extracted SIREN must be validated: does the entity exist? Is it active (not struck off, not in insolvency proceedings)? Is its registered office address in France? Cross-referencing with INPI or Pappers answers all three questions and qualifies the result.

Use cases: who needs to identify the SIREN of an e-commerce website?

B2B prospecting teams

To build a prospecting database from a list of e-commerce sites, the SIREN is the enrichment key. It provides access to official data (exact company name, executive, headcount, incorporation date) and eliminates duplicates — a list of domains is not enough: you need the SIRENs to deduplicate (some companies manage multiple domains), enrich with registry data (size, revenue, executive), and ensure that the targeted companies are genuinely active French entities.

Logistics providers and payment processors

Before integrating a new merchant, verifying their legal identity is a standard due diligence step. The SIREN allows cross-referencing with solvency scores, ongoing insolvency proceedings and the company's legal history.

Analysts and M&A teams

Building an e-commerce acquisition target universe requires linking each domain to its legal entity. Without the SIREN, it is impossible to cross-reference with official financial data available through INPI or Infogreffe.

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Frequently asked questions

How do I find the SIREN of a website manually?

Navigate to the site's legal notices (link usually in the footer). The SIREN or SIRET must be listed there for French companies. Cross-reference this number with INPI or Pappers to verify the entity. This method works on a single site but is not scalable.

Can I find the SIREN of a website through its IP address?

No. The server IP does not reflect the company's identity. On Shopify or any SaaS solution, the IP belongs to the platform's infrastructure, not the merchant. This method produces results with no value for identifying a company.

What is the difference between SIRET and SIREN?

SIREN (9 digits) identifies the company. SIRET (14 digits) identifies a specific establishment (registered office, warehouse, store…). To identify an e-commerce company, SIREN is the relevant identifier; SIRET is useful if you need to locate a specific establishment.

What if a website has no legal notices?

The absence of legal notices is a violation for any French commercial website. In practice, it may indicate a foreign entity not registered in France, a negligent micro-entrepreneur, or a ghost site. The lebot.in system detects this absence and flags it — which is itself a useful qualification signal.

Can I identify the SIREN of a Shopify or WooCommerce store?

Yes, provided the site displays legal notices. The CMS platform has no bearing on detection: whether it is Shopify, WooCommerce, PrestaShop or any other solution, the process analyses the site's legal pages, not its technical infrastructure.

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