Automating European Data Sovereignty Verification with EuroSeal

Practical Summary and Purpose

EuroSeal is a verification tool designed to audit the infrastructure footprint of SaaS platforms to ensure they remain free of US-jurisdiction dependencies. As of October 2026, with the enforcement of the EU Data Act, procurement teams increasingly require verifiable proof of European jurisdiction. EuroSeal addresses this by scanning domains from an external perspective, mapping hosting, CDN, DNS, email, analytics, and sub-processor configurations. The tool provides a public, timestamped report and a live, embeddable badge that updates automatically if the infrastructure stack drifts, allowing companies to demonstrate compliance without manual audits or sales-led documentation.

Prerequisites and Infrastructure Scope

To utilize EuroSeal, a company must operate a web-based service that relies on infrastructure components capable of being verified for geographic and jurisdictional location. The tool is specifically built to monitor the following categories: hosting providers, Content Delivery Networks (CDN), DNS services, email infrastructure, analytics platforms, and declared sub-processors. Because EuroSeal performs external scans, no agents or code changes are required within the internal server environment. The service is intended for organizations that need to prove their stack is free of US-jurisdiction ownership and CLOUD Act exposure to satisfy procurement requirements or regulatory standards like the EU Data Act.

Documented Workflow and Setup

The EuroSeal workflow is structured into three primary steps. First, the user provides their domain to the service. EuroSeal then maps the public infrastructure footprint of that domain, simulating how a skeptical customer or auditor would evaluate the service. Second, the system performs daily automated scans to check the identified components against criteria related to US-jurisdiction ownership and potential CLOUD Act exposure. Third, upon passing the scan, the user embeds a live badge into their website footer. This badge serves as a dynamic indicator of compliance, linking directly to a public, timestamped report that provides transparency for potential buyers or auditors.

To implement the badge, users insert the following script into their website footer:

< script src = "https://euroseal.eu/badge.js"    data-domain = "your-saas.eu" ></ script >

Reading the Output and Compliance Reporting

The output of the EuroSeal process is a public, timestamped report accessible via the embedded badge. This report is designed to be read by procurement teams and compliance officers without requiring an NDA or a sales call. The report details the findings of the daily scan, confirming whether the infrastructure remains 100% EU-sovereign. If the infrastructure stack drifts—for example, if a US-based dependency is introduced—the badge will automatically reflect this change within 24 hours. For higher-tier plans, such as the Agency plan, users can export this evidence as a PDF, which is intended to assist in vendor questionnaires, Data Protection Agreements (DPAs), and formal Data Act compliance reviews.

Limitations and Operational Considerations

While EuroSeal provides automated verification, it is important to recognize its operational boundaries. The tool is an external scanner; it does not have access to internal server configurations or private codebases. It relies on public infrastructure data, meaning it can only verify what is visible from the outside. Furthermore, the service is not affiliated with the European Commission. Users should be aware that the badge status is dynamic; if a service provider changes their ownership structure or if a new sub-processor is added that falls under US jurisdiction, the badge will downgrade. Users must monitor their email for 24-hour drift alerts to maintain continuous compliance status.

Choosing the Right Verification Plan

EuroSeal offers tiered pricing based on the number of domains and the level of reporting required. The Solo plan is designed for single-domain operations, providing daily scans and the live badge. The Studio plan supports up to five domains and includes sub-processor tracking and custom badge styling. The Agency plan supports up to 25 domains and adds the capability to export PDF evidence for procurement purposes, along with priority re-checks and support. Organizations should select a plan based on their portfolio size and the depth of documentation required for their specific regulatory or procurement environment. Detailed information on these options can be found at https://euroseal.pages.dev.