Data Sovereignty in MarTech

When I visited the Nordics in February, data sovereignty in MarTech came up in almost every serious marketing technology conversation. Not as a theoretical legal topic, but as a practical business issue: where is our customer data stored, who can access it, under which law, and what happens if two legal regimes disagree?

That concern is understandable. GDPR governs how personal data is processed and transferred from the EU. The US CLOUD Act gives US authorities routes to request data from US-based providers, including data held outside the US. The EU Data Act, applicable from 12 September 2025, adds further protections against unlawful third-country government access to non-personal data stored in the EU.

For marketing teams, this matters because modern MarTech runs on identifiable, behavioural and often sensitive customer data. Personalisation, journey orchestration, segmentation, analytics and AI all depend on data moving between platforms. The question is no longer just “is the platform compliant?” It is “can our operating model prove compliance when the data moves?”

Data sovereignty in MarTech is a board issue

Data residency and data sovereignty are related, but they are not the same. Residency is about where data is stored. Sovereignty is about which laws, authorities and contractual controls apply to that data. A European data centre helps, but it does not automatically remove jurisdictional exposure if the vendor, support teams, sub-processors or encryption controls sit elsewhere.

Marketing organisations should consider:

• Which customer data is collected, processed and activated
• Whether data is personal, pseudonymised, aggregated or non-personal
• Where production data, backups, logs and support data are stored
• Whether support access can be limited to specific regions
• Who controls encryption keys
• Which sub-processors are involved
• How consent, deletion, suppression and subject access requests flow across systems
• Whether AI features reuse, replicate or transfer data outside the agreed region
• What happens during incident response, migration or disaster recovery

The hardest part is usually not a single MarTech platform. It is the wider ecosystem: CDPs, campaign tools, web analytics, email, SMS, identity resolution, call centre integrations, data warehouses and BI layers. A compliant platform can still become risky if data is exported into unmanaged spreadsheets, copied into global sandboxes, or pushed into a third-party activation tool without a transfer assessment.

This is where privacy by design becomes operational rather than aspirational. Purple Square has previously written about the need to make privacy engineering transparent, including what data is captured, how it is used, where it is stored and how customers can manage consent and preferences. Read the article here https://purplesquarecx.com/privacy-by-design-enhances-customer-experiences/

What the major MarTech vendors are doing

The large vendors are responding, but in different ways.

Salesforce is leaning into regional infrastructure through Hyperforce. Its EU Operating Zone is positioned around keeping customer data in the EU, with EU-based support and controls designed for data residency requirements.

Adobe is taking a sovereignty-led approach for parts of its Experience Cloud estate. Adobe has announced Digital Sovereignty for Adobe Experience Manager Managed Services, and has also announced AEM Managed Services availability on AWS European Sovereign Cloud for customers with EU data residency and operational autonomy needs.

HCL Unica has a different strength: deployment flexibility. Unica is cloud-native but can be deployed across public, private or hybrid environments, giving organisations more control over where the platform and data sit. HCL’s GDPR guidance also includes utilities to help customers generate SQL scripts for deleting personal data from Unica system tables.

Bloomreach offers regional choices for Engagement, with documented Google data centre regions including EMEA locations in Belgium and London, North America and APAC. Its documentation also notes that workspaces can separate data by region for compliance.

Iterable has made a clear European move. Its European Data Center is in Ireland, supports storage and processing, and Iterable states that it does not send data to the US for EDC-hosted projects.

Optimove also gives customers regional choice. Its GDPR and CCPA guidance says Optimove operates a European data centre in Frankfurt, Germany, and customers can choose to store data in Frankfurt or the US. Optimove also states that it will not transfer storage or processing of customer personal data outside the country where it is hosted, in line with controller instructions.

imagino takes a governance-led position around customer engagement and CDP use cases. Its public materials emphasise role-based access, permissions, audit controls and built-in governance for scaling engagement across brands, markets and teams. That does not replace a formal data residency assessment, but it is relevant for marketing teams trying to control who can access customer data and how it is used.

Pega is also moving in this direction, particularly for regulated and enterprise environments. Pega now provides Pega Blueprint in regional cloud environments covering the US, UK, EU, Australia, Japan and Singapore. Its materials state that Blueprint data and uploaded documents are stored and processed within local jurisdictions, although some network monitoring and provisioning activities may occur inside or outside the selected region depending on subscribed services.

What marketing leaders should do next

The right response is not to reject global platforms. It is to become more precise in selection, contracting and architecture.

Start by mapping your customer data flows across the full marketing lifecycle: collection, enrichment, segmentation, activation, reporting, retention and deletion. Then classify which flows are high risk. Anything involving behavioural profiles, financial vulnerability, health indicators, children, regulated sectors or AI-driven decisioning deserves extra scrutiny.

In vendor selection, ask for evidence, not reassurance. Request data flow diagrams, subprocessors, support access models, region availability, backup locations, encryption options, deletion processes and AI data-use terms. For US-headquartered vendors, ask how they handle government access requests and whether customer-managed keys, regional support or sovereign cloud options are available.

For existing stacks, focus on the gaps. Many organisations already have strong legal paperwork but weak operational control. Check whether test environments contain live personal data, whether exports are monitored, whether campaign teams understand regional restrictions, and whether consent changes are synchronised quickly enough across platforms.

The Nordic conversations felt like an early signal of a broader shift. Marketing teams still need speed, personalisation and performance, but trust is becoming part of the architecture. Data sovereignty in MarTech is not just a compliance issue. It is becoming a buying criterion, a design principle and, increasingly, a competitive differentiator.

Useful Links:

https://digital-strategy.ec.europa.eu/en/policies/data-act  [European Commission – Data Act]

https://www.justice.gov/criminal/cloud-act-resources [US Department of Justice – CLOUD Act overview]