OpenAPI vs WSO2: What are the differences?

Introduction

OpenAPI and WSO2 are two widely used technologies in the field of API management. Both offer various features and functionalities that can be utilized to develop and manage APIs effectively. However, there are several key differences between OpenAPI and WSO2 that are worth noting.

1. Definition and Purpose: OpenAPI, formerly known as Swagger, is a specification that allows developers to design, document, and consume RESTful web services. It provides a standard way to describe APIs and allows for easy integration with different programming languages and tools. On the other hand, WSO2 API Manager is a comprehensive platform that enables organizations to create, publish, manage, and secure APIs. It offers a range of additional features such as API monetization, analytics, and developer portal, making it a complete API management solution.

2. Vendor Dependency: OpenAPI is an open standard that is maintained and governed by the OpenAPI Initiative, which includes a community of contributors from various organizations. It is not tied to a specific vendor and can be implemented using different tools and frameworks. WSO2, on the other hand, is a commercial product developed and supported by WSO2 Inc. As such, it requires the use of WSO2 products and tools to fully utilize its capabilities. This vendor dependency can have implications in terms of cost, support, and flexibility.

3. API Development Lifecycle: OpenAPI primarily focuses on the design and documentation aspects of API development. It provides a structured way to define the API contract, including endpoints, input/output parameters, data models, and authentication requirements. WSO2 API Manager, on the other hand, offers a comprehensive set of tools and features to manage the entire API lifecycle, from design and development to deployment, monitoring, and governance. It includes features such as API versioning, lifecycle management, and automated testing, which are not provided by OpenAPI alone.

4. Security and Authentication: OpenAPI provides a standard way to document and specify the security requirements of an API, such as authentication methods, scopes, and roles. However, it does not offer built-in security capabilities. WSO2 API Manager, on the other hand, provides advanced security features out of the box, such as OAuth 2.0, JWT token-based authentication, throttling, and rate limiting. It also supports integration with various identity and access management systems, making it easier to implement secure APIs.

5. API Gateway and Proxy: OpenAPI does not provide a built-in API gateway or proxy. It is primarily focused on API design and documentation. However, it can be integrated with third-party API gateways and proxies to expose and manage APIs. WSO2 API Manager, on the other hand, includes a built-in API gateway and proxy component. It provides a secure and scalable runtime environment for APIs, allowing organizations to enforce policies, perform traffic management, and monitor API usage in real-time.

6. Integration and Extensibility: OpenAPI is designed to be language-agnostic and can be implemented using different programming languages and frameworks. It provides a simple, yet powerful, way to describe APIs. WSO2 API Manager, on the other hand, is built on top of the WSO2 Integration Platform, which offers extensive integration capabilities. It supports various protocols and standards, such as HTTP/S, WebSockets, REST, SOAP, and MQTT, making it easier to integrate APIs with different systems and technologies.

In summary, OpenAPI is a specification that focuses on API design and documentation, while WSO2 API Manager is a full-fledged API management platform that provides additional features for the entire API lifecycle, including versioning, security, and runtime governance. WSO2 API Manager also includes a built-in API gateway and proxy, advanced security capabilities, and extensive integration options, making it a comprehensive solution for API management.