From Legacy SOAP to Modern gRPC: Migrating Enterprise KYC

The Need for ModernizationLegacy SOAP systems are bottlenecks for enterprise KYC, hindering scalability, performance, and real-time fraud prevention in a rapidly evolving digital landscape.

gRPC AdvantagesMigrating to gRPC offers significant benefits, including improved speed, efficiency, and real-time communication capabilities, crucial for dynamic identity verification and compliance workflows.

Streamlined IntegrationModern API-first approaches, especially those leveraging gRPC, simplify integration, reduce development overhead, and enable faster iteration cycles for identity verification solutions.

Didit's Role in MigrationDidit provides an AI-native, modular identity platform with clean APIs, including gRPC support, enabling seamless migration, enhanced security, and cost-effective, high-performance KYC/AML operations.

The Evolution of Enterprise KYC: Why Legacy Systems Fall Short

For years, enterprises relied on SOAP (Simple Object Access Protocol) for their critical backend operations, including Know Your Customer (KYC) and Anti-Money Laundering (AML) processes. While SOAP offered a robust, standards-based approach for distributed applications, its verbosity, XML-based messaging, and inherent complexity have become significant liabilities in today's fast-paced digital environment. Legacy SOAP-based KYC systems often suffer from:

• Performance Bottlenecks: The overhead of XML parsing and larger message sizes leads to slower response times, impacting user onboarding and real-time decision-making.
• Scalability Challenges: As transaction volumes grow, SOAP services struggle to scale efficiently, leading to increased infrastructure costs and reduced availability.
• Developer Complexity: Working with WSDLs and SOAP tooling can be cumbersome, slowing down development cycles and increasing the learning curve for new engineers.
• Limited Real-time Capabilities: SOAP's request-response model is ill-suited for the real-time, streaming data requirements of modern fraud detection and continuous monitoring.

In an era where instant onboarding, seamless user experiences, and robust fraud prevention are paramount, these limitations are no longer acceptable. Businesses need a more agile, performant, and developer-friendly approach to identity verification.

Embracing gRPC: The Future of High-Performance KYC

Enter gRPC – a modern, high-performance RPC (Remote Procedure Call) framework developed by Google. Built on HTTP/2 for transport, Protocol Buffers (Protobuf) for interface description, and supporting various languages, gRPC offers a compelling alternative to legacy SOAP. For enterprise KYC, the advantages are transformative:

• Superior Performance: gRPC's use of HTTP/2 and Protobuf results in significantly smaller message sizes and faster data transfer, leading to dramatic improvements in latency and throughput. This is critical for real-time identity checks, such as Didit's ID Verification, which processes documents across 130+ languages and 4000+ document types with cutting-edge AI and computer vision.
• Enhanced Scalability: HTTP/2's multiplexing capabilities allow multiple concurrent requests over a single connection, making gRPC highly efficient for microservices architectures and distributed KYC systems that need to handle massive loads.
• Developer-Friendly: Protobuf provides a language-agnostic, strongly-typed contract for services, simplifying client and server generation and reducing integration errors. This accelerates development cycles for implementing complex workflows like AML Screening & Monitoring.
• Bidirectional Streaming: gRPC natively supports bidirectional streaming, opening up possibilities for real-time data flows essential for continuous fraud monitoring, passive liveness detection, and dynamic risk assessment.
• Language Agnostic: With support for numerous programming languages, gRPC promotes interoperability across diverse enterprise technology stacks, a boon for complex identity platforms.

Migrating to gRPC is not just about changing protocols; it's about adopting a paradigm that aligns with the demands of modern digital identity, offering the speed and efficiency required for robust fraud prevention and seamless user journeys.

Strategic Migration: A Phased Approach to Modern KYC

Migrating an enterprise KYC system from SOAP to gRPC requires careful planning and execution. A phased approach is often the most effective, minimizing disruption while gradually introducing the benefits of the new architecture:

1. Assess Current State: Catalog all existing SOAP services, their dependencies, and usage patterns. Identify critical path services that would benefit most from early migration, such as those involved in initial user onboarding and ID Verification.
2. Design New gRPC Services: Define Protobuf schemas for your new gRPC services, mapping the functionality of your existing SOAP services. Focus on creating granular, single-purpose services that align with a microservices philosophy. Consider how new capabilities, like NFC Verification for ePassports/eIDs or 1:1 Face Match, can be integrated.
3. Build and Test in Parallel: Develop new gRPC services alongside your existing SOAP services. Implement robust testing, including performance and load testing, to ensure the new services meet enterprise requirements. Didit's developer-first approach, with an instant sandbox and clean APIs, significantly streamlines this phase.
4. Implement Proxy/Adapter Layer: For services that cannot be immediately migrated, create an adapter or proxy layer that translates SOAP requests to gRPC calls and vice-versa. This allows for a gradual transition without a hard cutover.
5. Phased Rollout and Monitoring: Begin diverting a small percentage of traffic to the new gRPC services, closely monitoring performance, error rates, and overall system health. Gradually increase traffic as confidence grows.

This strategic migration path allows organizations to incrementally modernize their identity infrastructure, leveraging the power of gRPC for better performance and scalability without disrupting ongoing operations.

How Didit Helps: Your Partner in Modern KYC Migration

Didit is an AI-native, developer-first identity platform designed from the ground up to address the challenges of modern identity verification. We understand the complexities of migrating from legacy systems and offer a modular, high-performance solution that makes the transition seamless and beneficial.

Didit's architecture is built for speed and efficiency, offering clean APIs that support modern communication protocols, including gRPC. This means you can integrate Didit's robust identity primitives directly into your new, high-performance gRPC-based KYC stack.

Here’s how Didit empowers your migration:

• AI-Native Performance: Our ID Verification solution delivers enterprise-grade document authentication across 130+ languages and 4000+ document types, powered by cutting-edge AI and computer vision. This ensures fast, accurate, and secure identity verification at scale, outperforming legacy systems.
• Modular and Composable: Didit offers a suite of identity modules—from ID Verification (OCR, MRZ, barcodes) and Passive & Active Liveness to 1:1 Face Match, AML Screening & Monitoring, and Proof of Address. Our modular architecture allows you to plug-and-play the exact components you need, orchestrating workflows through a no-code Business Console or directly via APIs. This flexibility is ideal for replacing specific parts of your legacy system or building entirely new verification flows.
• Free Core KYC: Didit stands out by offering Free Core KYC. This allows businesses to start verifying identities without upfront costs, making the migration to a modern system financially accessible and risk-averse.
• Developer-First Approach: With an instant sandbox, comprehensive public documentation, and clean APIs, Didit significantly reduces the development overhead associated with integration. Our platform is designed for developers, by developers, ensuring a smooth and efficient migration experience.
• Global Compliance and Security: Didit is ISO 27001 certified, GDPR compliant, iBeta Level 1 certified for liveness detection, and EU AI Act ready. This enterprise-grade security and compliance infrastructure ensures that your modernized KYC processes meet the highest international standards.

Whether you're looking to enhance performance, improve scalability, or streamline compliance, Didit provides the tools and technology to future-proof your identity verification strategy.

Ready to Get Started?

Ready to see Didit in action? Get a free demo today.

Start verifying identities for free with Didit's free tier.