See every third party your website loads
Scripts, trackers, cookies, CDNs and non-European vendors. Mapped, scored and audit-ready before your next customer, audit or client review.
Who StackPatrol is for
Built for European teams that care about what their website depends on.
European startups
Indie founders and SaaS teams who want to understand their stack.
SaaS teams
Engineering and ops teams mapping vendor dependencies.
Web agencies
Audit client sites quickly and propose European alternatives.
Privacy consultants
Get a fast technical overview before deeper review.
Small businesses
See which external services your site relies on.
In-house IT
Maintain a living map of front-end third parties.
Most websites don't know what they're loading
The average page makes requests to dozens of third-party domains. Few teams can list them all.
Hidden dependencies
Marketing tags, fonts, embeds and CDNs pile up, often without anyone keeping track.
Unclear data flows
It's hard to know which vendors are US-owned, EU-based, or somewhere in between.
No simple overview
StackPatrol gives you a clean, technical map of your front-page vendor footprint.
How it works
Paste a URL. We do the rest.
Enter your URL
Paste any public website address. No account needed.
We scan two pages for free
Headless Chromium loads your front page and one additional internal page, recording every request.
Get a region-aware report
Vendors classified by region with EU Independence Score and European alternatives.
What you get
A clean, shareable report built for technical teams. Free, no signup.
Detect every third-party script
Trackers, analytics, tag managers, fonts, CDNs and embeds. A headless browser loads your actual pages and records every outbound request.
Map vendors by region
US, EU, EEA, UK or Unknown for every vendor found.
Discover EU alternatives
Curated European replacements for the most common US tools. Fewer transfer-mechanism questions to answer.
Know the moment your stack changes
StackPatrol re-scans your sites every week. If a new vendor sneaks in (a rogue analytics tag, an unplanned pixel, a new CDN) you get an email alert the same day. No more surprises at the next audit.
From one free scan to a recurring audit business
Most users start with a free scan, then turn it into an ongoing workflow. Here's the path.
Scan it free
Paste any URL. We crawl 2 pages with a real browser and return a full vendor map in under a minute. No signup.
Monitor weekly
Pro turns the scan into weekly re-checks with email alerts, custom paths and an automatic post-consent pass that catches trackers loading only after the cookie banner. Find out the same day a new tracker appears on your site.
Document it
Order a 20-page PDF audit you can hand to your DPO, your board or your client. Branded versions included on Agency plans.
Sell it as a service
Audit up to 100 client sites, run white-label PDFs under your own brand, and turn one-off audits into a monthly retainer.
Frequently asked questions
Is StackPatrol a GDPR compliance tool?
No. StackPatrol is the technical map your DPO needs before the legal review. It surfaces the third-party services your website loads and where those vendors are based, so legal analysis starts from facts. We don't give legal advice or certify compliance.
How is StackPatrol different from BuiltWith?
BuiltWith is a sales-intelligence tool focused on identifying technology stacks for B2B prospecting. StackPatrol is built for digital sovereignty: it classifies vendors by ownership region (US, EU, China, etc.), explains the jurisdictional picture, and suggests European alternatives. No signup required, and we don't sell the data.
What does the free scan cover?
Scanning is completely free and unlimited. No account, no credit card needed. Any scan loads your front page and one additional internal page using a real browser. You get a full vendor report, EU Independence Score and EU alternatives instantly.
What's the difference between free and Pro?
Scanning is always free for everyone. Pro (€39/month) adds a personal dashboard with full scan history, plus automatic weekly monitoring with email alerts when new vendors appear or disappear. Monitor up to 5 sites on Pro, 10 on Agency Starter (€89/month), 30 on Agency (€149/month) or 100 on Agency Pro (€299/month).
What is the one-time PDF report?
The paid PDF (€79, one-time) crawls up to 20 pages across your site and delivers a complete vendor audit as a formatted PDF. Useful as documentation for DPOs, dev teams or clients. Order it from any scan results page after running a free scan.
How is the EU Independence Score calculated?
It starts at 100. Each non-EU vendor reduces the score by a base jurisdiction risk (e.g. 8 for US, 14 for China) multiplied by how sensitive the vendor's category is. A tag manager scores higher than a font. A separate ratio penalty applies when non-EU vendors dominate the stack. Unmatched domains reduce the score further. The score card shows the full breakdown.
Do you store my scan?
Yes. Scan results are saved so you can share a link to your report. If you're signed in, scans are also saved to your personal dashboard. We don't use the data for advertising or sell it to third parties.
A note on this report
StackPatrol is the technical map your DPO needs before the legal review. It surfaces the third-party services your site loads and where those vendors are based, so the legal analysis starts from facts, not guesswork.
What we provide is a technical signal: ownership region, observed network requests, vendor metadata. Legal applicability — whether a specific vendor or data flow is lawful for your use case — depends on your contracts, DPAs, sub-processors, data categories, and legal basis. We don’t give legal advice.
Vendor database verified June 2026.
Free scan · Pro monitoring
Know exactly what
your website loads.
Start with a free scan. Upgrade to Pro for weekly monitoring and instant alerts when your vendor stack changes.