Kong vs Azure API Management: Key Differences and Features
Your underlying infrastructure often dictates your tooling choices. For example, if you are evaluating API management platforms and you have roots in the Microsoft ecosystem, you will likely gravitate toward Azure API Management. It fits the existing ecosystem well and unifies services with minimal friction.
But modern architectures rarely stay within one cloud. They span AWS, Google Cloud, and on-premise servers. So another option might be Kong. It brings NGINX speed to every environment, regardless of the hosting provider.
In this article, we compare Kong and Azure API Management across the features they offer, their performance posture, and how they charge customers. In the end, you will be able to determine which solution suits your deployment strategy and understand how WSO2 offers the best of both worlds under the umbrella of a unified platform.
What is Kong?
Kong is a lightweight, open source API gateway. It acts as the entry point to your applications, managing traffic from your users to your backend services.
The platform is built on top of NGINX. This foundation makes it extremely fast and efficient. It handles high performance workloads with low latency, which is why many engineers choose it for microservices.
You don't need to write code for every function. Instead, you use plugins. These Lua-based components handle common tasks like authentication, rate limiting, and logging. You can even write custom plugins in Lua, Go, or Python if the standard ones don't fit your needs.
Kong runs anywhere. You can deploy it on bare metal, in containers, or natively on Kubernetes. This flexibility makes it ideal for hybrid deployments and multi cloud environments.
Core Offerings
Kong provides a set of tools to handle API lifecycle management:
- Kong Gateway: The core engine that processes traffic. It handles security, routing, and integration for your APIs.
- Kong Konnect: A managed SaaS control plane. It gives you a central dashboard, analytics, and a developer portal to manage your gateways.
- Kong Mesh: An enterprise service mesh based on Kuma. It secures the traffic flowing between your internal services.
- Insomnia: A desktop application for developers to design, debug, and test REST APIs and GraphQL endpoints.
What is Azure API Management?
Azure API Management is a fully managed service that helps you publish, secure, and analyze APIs. It sits between your backend services and your internal or external users, acting as a central control point for all API traffic.
Though native to the Azure cloud, it supports hybrid deployments across multi cloud environments and on-premises systems. It abstracts your backend architecture so you can modernize legacy services or integrate diverse Azure services without changing code.
Azure API Management uses policies to handle cross-cutting concerns.You can configure authentication and throttling rules at the gateway, in lieu of implementing into each microservice. Same goes for rate limiting, security policies, and request transformation; they can be enforced on the fly through simple configuration steps.
The platform scales to fit your needs, whether it be a serverless model or a premium multi-cloud tier.
Primary Components
Azure API Management consists of three main components that work together:
- API Gateway: The endpoint that accepts API calls and routes them to backends. It performs key verification, low latency routing, and caching for high performance.
- Management Plane: The administrative interface where you set up your API program. Here, you define schemas, apply policies, and view analytics to track usage and health.
- Developer Portal: A customizable developer portal where developers can discover APIs, read API documentation, and test endpoints. It handles user onboarding and key management automatically.
- Self-Hosted Gateway: A containerized version of the API gateway that you can deploy anywhere, on-premises or in other clouds, to keep traffic local while managing it from Azure.
Kong vs. Azure API Management: Key Features
Kong and Azure API Management both provide the requisite tools for API lifecycle management. However, the specific features vary based on their architecture. The following table breaks down the primary features of each solution:
| Feature | Kong | Azure API Management |
|---|---|---|
| Architecture | Lightweight open source API gateway built for Kubernetes and containers | Fully managed PaaS solution native to the Azure cloud |
| Deployment | Runs anywhere: on-premise, multi cloud, or hybrid | Best for Azure but supports hybrid deployments through self-hosted gateways |
| Extensibility | Uses custom plugins (Lua, Go, Python, JS) to extend functionality | Uses XML policies to transform data and apply policies |
| Protocols | REST, gRPC, GraphQL, TCP/UDP, Kafka | REST, SOAP, WebSocket, GraphQL |
| Observability | Connects with external analytics tools like Prometheus and Datadog | Native integration with Azure services like Azure Monitor |
| Developer Portal | Available in enterprise tiers and Kong Konnect | Built-in customizable developer portal included in most tiers |
Kong vs. Azure API Management: Performance
Kong, by design, runs locally as a proxy next to your services. Azure API Management sits at the network edge as a managed service. Here are some more details about how these architectures affect performance:
| Feature | Kong | Azure API Management |
|---|---|---|
| Latency | Low latency (often sub-millisecond) owing to local NGINX processing | Higher latency resulting from network hops; "Consumption" tier has cold starts owing to its serverless model |
| Throughput | High performance, handling tens of thousands of requests per second | Varies by tier; requires adding expensive "units" to match high loads |
| Scalability | Scales instantly with Kubernetes (HPA) based on traffic spikes | Scales by provisioning units; auto-scaling is slower than container-native |
| Global reach | Runs in multi-cloud regions or edge locations through simple replication | Premium tier supports multi-region, but costs increase significantly |
| Resource usage | Lightweight; efficient enough to run as a sidecar in every pod | Managed infrastructure; you don't manage resources but the capacity units |
Kong vs. Azure API Management: Pricing
| Feature | Kong | Azure API Management |
|---|---|---|
| Free options | Open Source API Gateway is free forever (you pay for infrastructure) | Consumption tier offers 1M free calls/month per Azure subscription; Developer tier is low-cost for testing |
| SaaS / Cloud | Kong Konnect (SaaS) charges based on usage (API requests and services) | Consumption tier is pay-per-call; Basic, Standard, and Premium are fixed monthly fees |
| Enterprise / Scale | Enterprise plans are custom quotes based on services and support | Premium tier is a high fixed monthly cost (~$2,800/mo) for features like multi-region and VNETs |
| Hidden costs | Operational costs for self hosted instances (compute, storage, DevOps time) | Data transfer fees and cost of additional "units" to scale throughput |
| Support | Community support (free); Enterprise support paid separately | Included in Azure support plans (Basic to Premier) |
When to Choose Kong
Select Kong when your architecture necessitates speed and flexibility across diverse environments. This open source API gateway shines in modern, containerized setups.
Consider Kong if your requirements check the following:
- Prioritize performance: Kong runs on NGINX. So high-traffic systems will greatly benefit from its low-latency request processing.
- Kubernetes ecosystem: Engineering teams often prefer Kong for its native Kubernetes integration. It fits into GitOps workflows and makes use of Kong Ingress Controller to manage traffic.
- Require custom logic: You can write custom plugins in Lua, Go, or Python. It allows you to tailor traffic handling to your exact specific needs.
- Manage hybrid architectures: Kong deploys anywhere. You can run it on-premise, in the cloud, or across multi cloud environments without altering your operational model.
When to Choose Azure API Management
Select Azure API Management if your organization has already invested heavily in the Microsoft ecosystem. It simplifies integration with existing Azure services and offers a mature, managed experience.
Opt for Azure API Management if you:
- Already use Azure services: This solution connects naturally with Azure Logic Apps, Azure Functions, and Azure Service Bus. It unifies your cloud infrastructure.
- Prefer configuration over code: You manage security policies and traffic rules through XML configuration. This approach suits teams that want to apply policies without writing backend code.
- Need integrated security: It integrates directly with Azure Active Directory (Entra ID). This feature streamlines authentication and access control for your enterprise users.
- Want a managed service: Microsoft handles the underlying infrastructure. You focus on API design and strategy rather than server maintenance or patching.
WSO2: The Best of Both Worlds
WSO2 API Manager combines the modular nature of independent software with the strong governance of a managed enterprise suite. It is engineered to address both standard API management requirements and intricate system integration challenges within a single platform, offering integrated analytics and strong security features.
Why Choose WSO2?
- True Multi-Gateway Federation: You control third-party gateways, including Azure APIM and AWS, under a single, unified control plane. This way, you unify your multi cloud environments. You gain visibility across your entire architecture without replacing your existing infrastructure.
- Unified AI governance: The platform prepares you for the next wave of technology with unified AI governance. It manages traffic for standard APIs and AI/LLM models alike. It includes out-of-the-box readiness for the Model Context Protocol (MCP), which secures your AI adoption.
- Zero vendor lock: The solution is built on an open-source core (Apache 2.0). You deploy on-premises, in the cloud, or in hybrid deployments without proprietary restrictions. It adapts to your specific needs rather than forcing you into a specific ecosystem.
- Comprehensive developer portal: WSO2 offers a highly customizable, integrated developer portal for easy API discovery, testing, and subscription. Its user-friendly interface allows creating branded experiences and fosters a strong internal and external developer ecosystem.
- Bespoke monetization and analytics: WSO2 offers built-in monetization and integrates with Moesif for more enhanced API monetization, and AI-driven, robust API analytics, facilitating immediate tracking of adoption, usage, and revenue.
- API lifecycle management: WSO2 provides a sophisticated API gateway that surpasses more basic alternatives by offering detailed API lifecycle states (Created, Published, and Deprecated). Enterprises can thereby manage their entire API lifecycle and large-scale API ecosystems with high precision.
- Robust security and compliance support: The platform integrates advanced security, including OAuth access control, fine-grained API security policies, and threat protection.
Conclusion
The decision between these two platforms ultimately boils down to your deployment strategy. Azure API Management makes perfect sense if you inhabit the Microsoft ecosystem and value tight integration over configurability. But if you favor mobility, choose Kong. It travels anywhere your containers go and delivers the lowest latency for microservices.
WSO2 presents a unique albeit powerful solution that governs your Azure and Kong gateways from a centralized location. You gain unified AI control and open-source liberty without ripping out your current stack. WSO2 manages the complexity of multi-cloud environments while you retain the freedom to run workloads anywhere.
