About StackPatrol

Most websites have no idea what they actually load. Marketing tags, fonts, embeds, CDNs, RUM beacons and analytics pile up, often added by different teams over years. Few people can list them all, and fewer still can say where the data goes.

Existing tools are either heavy compliance suites priced for enterprises, or browser extensions aimed at end-users. We wanted something in between: a fast, free, technical scan that gives a European startup, agency or consultant a clean overview in under a minute.

• Transparency over magic. Our methodology page explains exactly what we measure and how the score is computed.
• Scanning is always free. No account, no credit card, no scan limit. If you find value in the tool, consider upgrading to Pro for scan history and monitoring.
• European alternatives matter. For every common US-owned vendor we surface a curated list of European or independent alternatives, so teams can make informed choices.
• Privacy by default. We don’t track visitors with third-party analytics. Scan results are saved so you can share a report link. If you’re signed in, scans are saved to your personal dashboard for your eyes only.
• Open methodology, not legal advice. StackPatrol is a technical scanner. It does not certify GDPR compliance and it is not a substitute for a privacy lawyer or DPO.

• A consent-management platform.
• A GDPR / DSA compliance certification service.
• A pen-testing or security scanner.
• An advisory firm: we have no commercial relationship with any of the vendors we list.

The vendor database is hand-curated. Each entry contains the vendor name, country and ownership region, what it does, and curated European alternatives. We add new vendors continuously as we encounter unmatched third-party domains.

Browse the full list in the vendor directory.

StackPatrol is a paid product. Scanning is always free and unlimited, no account needed. Pro (€39/month) adds a personal scan history dashboard and weekly monitoring for up to 5 sites. Agency Starter (€89/month), Agency (€149/month) and Agency Pro (€299/month) scale up to 10, 30 and 100 monitored sites, with white-label PDF reports on the Agency tiers. A one-time PDF audit report is also available for €79, no subscription needed.

The free tier (no account required) will always exist. We have no commercial relationship with any vendor we list, and we don’t sell scan data.

Found a wrong classification, missing vendor, or a bug? Want to partner, embed or self-host? We’d love to hear from you.

Use our contact page or email us directly at Andreas@stackpatrol.eu.