KrakenD

KrakenD is a high-performance, open-source API Gateway designed to simplify the adoption and management of microservices. It acts as a stateless, distributed gateway that can connect, secure, aggregate, transform, and filter data from various backend services. Its architecture prioritizes speed, enabling it to handle thousands of requests per second with consistent performance, even under heavy loads. The product is ideal for organizations and developers building and managing complex microservice architectures who need a robust, scalable, and efficient way to expose their APIs. It helps solve common microservice concerns like API aggregation, traffic management, and authentication, allowing development teams to focus on core business logic. KrakenD emphasizes a GitOps approach, where the gateway's configuration is managed through a single binary and version control, reducing infrastructure complexity and costs. It also offers transparent pricing with unlimited requests and APIs across all plans. KrakenD is built for performance-critical environments, evidenced by its ability to achieve over 80,000 requests/second on commodity hardware. It integrates with various services beyond just REST APIs, including message queues (RabbitMQ, Kafka), GraphQL, gRPC, and serverless functions (Lambda). The platform also provides extensive features for data manipulation, monitoring through OpenTelemetry, and automatic documentation generation via OpenAPI.