Fluxzy is an HTTP proxy for recording, examining, debugging, and changing HTTP/1.1, HTTP/2, and WebSocket traffic over plain or secure connections.
Alternatives to ProxyKit
NetworkSpy is an application-level HTTP/HTTPS debugging tool for capturing and analyzing network traffic.
Moni Proxy captures and inspects HTTP/HTTPS traffic directly on devices, with tools to mock, rewrite, and replay requests.
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Reqable
Reqable is a cross-platform HTTP development and debugging tool for API testing and traffic analysis, available on Android, iOS, Linux, macOS and Windows.
Free planAndroidiOSAPILinux8.1From $49.90 a year - 5
ProxyHawk
ProxyHawk is a native macOS proxy debugger for capturing and inspecting HTTP traffic from selected devices.
Free planAndroidiOSmacOS7.9From ₹3,750 a year - 6

mitmproxy
mitmproxy is a free set of tools for inspecting and changing HTTP/1, HTTP/2, WebSocket, and SSL/TLS traffic as it passes through a proxy.
Free planOpen sourceWebAPILinuxmacOS7.7Free plan - 7
Proxyman
Proxyman is an HTTP debugging proxy for capturing, decrypting, and mocking HTTP(S) requests and responses.
AndroidiOSAPILinux7.7From $99 a year - 8
OWASP ZAP
OWASP ZAP, now identified as ZAP or ZAP by Checkmarx, is a free, open-source web application scanner and proxy for security testing.
Free planOpen sourceAPIExtensionLinuxmacOS7.6Free plan - 9

Fiddler Everywhere
Fiddler Everywhere captures and works with HTTP/S traffic moving across applications, services, and devices.
AndroidiOSLinuxmacOS7.0From $84 a year - 10

HTTP Toolkit
HTTP Toolkit is an open-source tool for debugging, testing, and building with HTTP.
Free planAndroidiOSWebLinux7.0Free plan - 11

Requestly
Requestly is a desktop API client with web access for building, organizing, documenting, and testing APIs.
LinuxmacOSWindows7.0From $10 a month - 12
Rockxy
Rockxy is an open-source debugging proxy for macOS that captures and inspects app and device traffic, then lets users modify, replay, and compare requests.
Free planiOSmacOS6.9From $9 a month - 13
Charles
Charles is a web proxy and HTTP monitor for viewing traffic sent and received by browsers and other internet applications configured to use it.
iOSLinuxmacOSWindows6.8$50 one-time - 14
Probe
Probe is a local HTTP/HTTPS debugging proxy and API client for examining app traffic, adjusting requests and responses, mocking endpoints, and automating API work.
Free planAndroidiOSAPImacOS6.8Free plan - 156.7$25 one-time
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Burp Suite DAST
Burp Suite DAST is an automated dynamic web vulnerability scanner built on the scanning engine used in Burp Suite Professional.
WebAPILinuxSelf-hosted6.4 - 17
HTTP Debugger
Windows6.3 - 18
D Inspector
Free planiOSmacOS5.8Free plan - 19
Inspectr
WebLinuxmacOSWindows5.7From $5 a month - 20
Intercept REST
Free planWeb5.5Free plan - 21
Proxygen
iOSmacOS5.5$39 one-time - 22
Lantern
WebLinuxmacOS4.9 - 23
ZProxy
LinuxWindows4.6

