1. Purpose: HTTP Toolkit is primarily designed for intercepting, debugging, and mocking HTTP/HTTPS traffic, making it a preferred choice for developers who require in-depth analysis and modification of network requests. Swagger Inspector, on the other hand, focuses on testing and documenting APIs, offering a user-friendly interface for creating and executing API requests without needing to set up a separate environment.

2. Features: HTTP Toolkit provides features such as request/response inspection, client mocking, and TLS validation, enabling users to closely monitor and manipulate network traffic. In contrast, Swagger Inspector offers functionalities like automated testing, API documentation generation, and schema validation, catering to users looking for streamlined API testing and documentation tools.

3. Integration: HTTP Toolkit can be integrated seamlessly with various programming languages and frameworks like Node.js, Java, and Python, allowing developers to incorporate it into their existing workflow effortlessly. On the other hand, Swagger Inspector seamlessly integrates with Swagger Hub, a platform for API development and collaboration, ensuring a smooth transition from testing to API documentation.

4. Customization Options: HTTP Toolkit offers extensive customization options for intercepting and modifying requests, including setting breakpoints, modifying headers, and altering response payloads, providing developers with granular control over network communication. Swagger Inspector, however, focuses more on predefined testing scenarios and automated workflows, limiting customization options to streamline the testing process.

5. Pricing Model: HTTP Toolkit offers a free version with limited features and a paid Pro version with advanced functionalities for professional users or teams requiring additional capabilities. In comparison, Swagger Inspector is available for free with basic testing features, while premium features and advanced capabilities are available through SwaggerHub subscription plans, making it more suitable for users already utilizing Swagger tools.

6. User Interface: HTTP Toolkit provides a more technical and detailed interface tailored for developers who require deep insights into network traffic, with features like detailed request/response information and visualization tools. In contrast, Swagger Inspector offers a user-friendly and intuitive interface suitable for users with varying levels of API testing experience, simplifying the testing and documentation processes.

In Summary, HTTP Toolkit and Swagger Inspector offer distinct features and functionalities catering to different aspects of API development, with HTTP Toolkit focusing on in-depth network traffic analysis and debugging, while Swagger Inspector prioritizes API testing and documentation automation.