Fiddler Alternatives

HTTP proxy / HTTP monitor / Reverse Proxy

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.

Open Source

NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.

Try for free paid Free Trial

The Collaboration Platform for API Development

Open Source

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.

Open Source $49.0 / Annually

Horangi is a leading cyber-security solution that provides instant response and threat detection for companies who lack the time and expertise to monitor their system.

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.

Open Source freemium €7.0 / Monthly (for a Pro subscription)

Network security & identity management

Intruder is a security monitoring platform for internet-facing systems.

paid Free Trial

Audit your website security and web applications for SQL injection, Cross site scripting and other...

mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP.

Open Source

Penetration testing solution for risk validation.

Skybox Vulnerability Control is an industry-leading cyber-security management solution that allows threat-centric vulnerability prioritization and scan-less vulnerability assessments in order to address security challenges within large and complicat…

Netsparker Security Scanner is a simple-yet-powerful web-based security scanner that automatically identifies XSS, SQL Injection, and all the other vulnerabilities and security flaws in sites, web apps, and web services.