How to Build SaaS Integrations That Comply with EU Data Residency Requirements (GDPR)

EU data residency and GDPR compliance present significant architectural challenges for SaaS companies integrating with various third-party platforms. The General Data Protection Regulation (GDPR) mandates strict safeguards for storing, processing, transferring, and accessing personal data from EU users, which complicates traditional integration architectures that often replicate data across different systems. To address these challenges, modern SaaS products are adopting architectural patterns that minimize data persistence and reduce cross-border transfers, such as real-time pass-through integrations. This approach ensures data is accessed directly from the source system at request time, eliminating the need for intermediate storage and significantly reducing the compliance burden. Unified exemplifies this model by operating with a real-time, pass-through architecture that keeps customer data within the original SaaS provider's region, thus simplifying GDPR compliance. By utilizing regional infrastructure, encryption, least-privilege authorization, and webhook-driven synchronization, Unified allows companies to integrate seamlessly with numerous applications while maintaining strict data protection standards.