Charles vs Restlet Studio: What are the differences?

What is Charles? HTTP proxy / HTTP monitor / Reverse Proxy. Charles is a web proxy (HTTP Proxy / HTTP Monitor) that runs on your own computer. Your web browser (or any other Internet application) is then configured to access the Internet through Charles, and Charles is then able to record and display for you all of the data that is sent and received.

What is Restlet Studio? The first browser-based IDE for APIs. Packaged as a Chrome extension and accessible from any modern web browser, Restlet Studio instantly provides to any developer powerful API crafting capabilities. Through an intuitive interface, developers can visually define all the elements of a web API, and automatically generate the client SDK and server skeleton of their API.

Charles and Restlet Studio can be primarily classified as "API" tools.

Some of the features offered by Charles are:

• SSL Proxying – view SSL requests and responses in plain text
• Bandwidth Throttling to simulate slower Internet connections including latency
• AJAX debugging – view XML and JSON requests and responses as a tree or as text

On the other hand, Restlet Studio provides the following key features:

• Visual Crafting of APIs
• RESTful APIs Made Easy
• No Wasted Configuration Time