Identifying Website Visitors Without Cookies, Here’s How It Works

Identifying Website Visitors Without Cookies, Here's How It Works
You invest in SEO, advertising, and content. Traffic grows. But 98% of your visitors remain unidentified. You don't know which companies are showing interest, who returns, or which pages signal buying intent. Without cookieless visitor identification, you miss concrete pipeline opportunities. Marketing sees statistics, but sales needs names. The solution? Identifying website visitors without cookies or personal data – fully GDPR-compliant. Leadinfo has been doing this since 2017 for over 20,000 European companies. In this article, we explain how cookieless identification works, what you see from identified companies, and why this technology is 100% compliant.

Why Companies Want to Identify Website Visitors

Most B2B companies convert less than 2% of their website traffic. The remaining 98% disappears without you knowing who they were.

For marketing, this means: you can’t properly attribute campaigns. For sales, this means: no warm leads, no timing, no follow-up opportunities. You operate on assumptions rather than data.

Traditional tools like Google Analytics show what happens. But they don’t reveal who visits your website. This makes it nearly impossible to follow up effectively or run successful ABM strategies.

Cookieless visitor identification solves this. You get concrete company names instead of anonymous sessions – without cookies, without personal data, without privacy risks.

How Does Cookieless Visitor Identification Work?

Leadinfo uses a combination of network metadata, IP-ASN mapping, and a European business database with 220 million profiles. The technology identifies companies based on their network infrastructure – not based on individual users.

Here’s how it works step by step:

  1. A visitor opens your website from a company network
  2. Leadinfo registers the public IP address (no personal data)
  3. The IP is matched with an ASN (Autonomous System Number)
  4. The ASN is linked to a company via our database
  5. You see the company name, sector, size, and behaviour

No cookies are placed. No device fingerprinting is applied. Leadinfo collects no personal data such as names, email addresses, or browser profiles.

The result: an identification rate of 35-40% without any privacy violation. This is market-leading in Europe for cookieless B2B visitor identification.

The Technology Behind Cookieless Recognition

The core of cookieless identification lies in IP-to-company matching. Every company with its own network has one or more IP ranges linked to a unique ASN.

Leadinfo maintains a database with ASN mappings for millions of European companies. When an IP address is recognised, we retrieve the corresponding company information in real-time: name, sector, locations, turnover, number of employees.

This happens without cross-site tracking or third-party cookies. Leadinfo uses only first-party technology. Data is processed in EU data centres (Ireland and Frankfurt), without transfers to the US or other third countries.

This method complies with GDPR Article 6(1)(f) – legitimate interest. Leadinfo processes exclusively business data, no personal data. This makes the technology legally solid and audit-proof.

What Do You See From Identified Companies?

Leadinfo shows per identified company:

  • Company name and location – including headquarters and branches
  • Sector and size – NACE classification, number of employees, turnover
  • Pages visited – which content, products, or services were viewed
  • Session depth and duration – how intensive the visit was
  • Return visits – frequency and return patterns
  • Buyer intent signals – such as pricing, demo, or integration pages
  • ICP match score – how well the company fits your ideal customer profile
  • Technology stack – CRM, marketing automation, analytics tools (where available)

So you don’t see who within the company visited the site, but you do see which company shows interest and what they do. That’s sufficient to activate marketing and sales – without personal data.

The data is updated in real-time. When a company returns, you see it immediately. When they request a demo or view a pricing page, you receive an alert via Slack, email, or CRM.

Privacy and Compliance: 100% GDPR-Compliant

Cookieless visitor identification is fully GDPR-compliant. Leadinfo adheres to three strict principles:

  1. No personal data – Leadinfo identifies companies, never individuals
  2. No cookies or fingerprinting – No tracking at user level
  3. EU-only hosting – Data remains in Ireland and Frankfurt, no US transfers

Leadinfo is ISO 27001:2022 certified. This means annual audits by LRQA, strict security protocols, and full traceability of data processing.

The legal basis is GDPR Article 6(1)(f) – legitimate interest. This article allows B2B companies to process business data for legitimate business purposes, without explicit consent.

Leadinfo does not process sensitive personal data. Visitors can opt out via the opt-out page. All processing is transparent and according to European legislation.

Key Benefits for B2B Companies

Cookieless visitor identification offers concrete advantages:

Direct pipeline insight – You see which companies visit your website, what they view, and how often they return. Marketing can better attribute campaigns. Sales can follow up warm.

No cookie banners needed – Leadinfo uses no cookies, so you don’t need to ask for consent. This increases the identification rate and simplifies your website.

Automatic CRM sync – Identified companies are automatically sent to HubSpot, Salesforce, Pipedrive, or your own CRM. Including all behavioural data and buyer intent signals.

Higher conversion rates – Through targeted follow-up of warm leads, your conversion rate increases. Instead of cold outreach, you focus on companies already showing interest.

ABM-ready – Account-based marketing requires visibility into target accounts. With Leadinfo, you see precisely when an ICP account visits your site and can take immediate action.

More than 20,000 European companies use Leadinfo for cookieless lead generation. The ROI is measurable: higher MQL quality, shorter sales cycles, and better marketing attribution.

Frequently Asked Questions

Is cookieless visitor identification GDPR-compliant?

Yes, fully GDPR-compliant via legitimate interest (Article 6(1)(f) GDPR). Leadinfo processes exclusively business data, no personal data. The technology is ISO 27001:2022 certified and uses EU-only hosting in Ireland and Frankfurt. No cookies, no fingerprinting, no US data transfers.

What percentage of visitors can you identify without cookies?

Leadinfo identifies 35-40% of B2B website traffic without cookies or personal data. This is market-leading in Europe for cookieless identification. The percentage depends on the availability of network metadata and the geographical spread of your visitors. Companies with their own IP ranges are best recognised.

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Calculate your price

Your price tier is based on the unique companies we identify monthly – roughly 30% of your website visitors.

Don’t worry; after the trial, we’ll send you a tailored proposal. You’ll never pay more than you want! 

Companies identified

Monthly cost

0- 50

€ 49

51 – 100

€ 79

101 – 250

€ 129

351 – 500

€ 149

501 – 750

€ 199

751 – 1000

€ 269

1001 – 1500

€ 399

1501 – 2000

€ 449

1501 – 2000

€ 499

Companies identified

Monthly cost

0- 50

€ 59

51 – 100

€ 99

101 – 250

€ 149

351 – 500

€ 179

501 – 750

€ 259

751 – 1000

€ 339

1001 – 1500

€ 449

1501 – 2000

€ 549

1501 – 2000

€ 599