FiddlerCore vs Whistle
| FiddlerCore | Whistle | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Windows, macOS, Linux | Android, iOS, Linux, macOS, Web, Windows |
| Free plan | No | — |
| Platforms | desktop | — |
| Request/response editing | Yes | Yes |
| Traffic replay | Yes | Yes |
| Response mocking | Yes | Yes |
| WebSocket inspection | Yes | Yes |
| Proxy chaining | Yes | Yes |
Both are listed in Best Web Debugging Proxies. On Samsung Mobile US Press, Whistle scores higher on our published basis.