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Spring Cloud Gateway vs. Netflix Zuul 2: Which API Gateway Should You Use in 2025?
- Spring Cloud Gateway (SCG) and Netflix Zuul 2 are key API gateways in Java for microservices architecture, offering different strengths.
- Performance-wise, SCG boasts lower latency, higher throughput, and lower CPU usage compared to Zuul 2.
- Feature-wise, SCG supports HTTP/2, WebSockets, and offers more modern protocol support, while Zuul 2 excels in fine-grained filters and dynamic server-side load balancing.
- SCG is cleaner for declarative routing, integrates better with Spring Boot Actuator, and is future-proof with WebFlux and HTTP/2 support.
- In 2025, it's recommended to use SCG if on Spring Boot/Cloud for high throughput and low latency, while Zuul 2 is ideal for Netflix OSS-heavy environments with complex request manipulation needs.
- Migration tips from Zuul to SCG include replacing Groovy filters with WebFlux GatewayFilter and utilizing Spring Cloud LoadBalancer.
- Detailed benchmark setups between SCG and Zuul 2 show SCG's superiority in performance, especially in throughput, latency, and resource usage.
- For most use cases in 2025, Spring Cloud Gateway emerges as the preferred choice, offering speed, modernization, and strong integration with Spring ecosystems over Zuul 2.
- Conclusion: Spring Cloud Gateway is recommended in 2025 for its performance and modern features, while Zuul 2 remains suitable mainly for legacy Netflix OSS setups.
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