Open-source alternatives to Goreplay

Proxypin is a cross-platform HTTP and HTTPS proxy debugger designed to capture, inspect, and modify network traffic. It functions as a man-in-the-middle interceptor, allowing developers to analyze application data flows and validate network communication during development and testing. The tool distinguishes itself through its focus on mobile and remote device integration, utilizing QR-code-based configuration synchronization to simplify the setup of proxy settings and security certificates. It includes an event-driven scripting engine that enables programmatic manipulation of requests and re

Wireshark is a network protocol analyzer and traffic inspector used for capturing and inspecting network traffic. It functions as a packet capture tool that intercepts live data from network interfaces and a TCP/IP dissector that decodes network protocol layers to translate raw binary packets into human-readable fields. The system provides capabilities for protocol stream reconstruction, grouping related packets into cohesive conversations between endpoints. It also operates as a packet file converter, allowing for the reading, modification, and conversion of network capture files across vari

Suricata is an open-source network intrusion detection and prevention engine that analyzes live network traffic in real-time to identify and alert on malicious activity. It operates as a rule-based threat detection system, matching traffic against user-defined signatures to detect known attack patterns and policy violations, and can be placed inline to actively block malicious packets before they reach their target. The engine inspects a wide range of application-layer protocols including HTTP, DNS, TLS, SMB, and MQTT, and supports high-performance packet capture through specialized hardware a

Moloch is a full packet capture system and network forensics platform designed for large scale network traffic recording and indexing. It functions as a distributed packet indexer that stores raw data in PCAP format for deep packet analysis and security investigations. The system distinguishes itself through a decentralized architecture that distributes capture and viewing components across multiple nodes to handle high volumes of network traffic. It utilizes a web-based management interface for browsing network sessions and provides a programmable API for exporting captured traffic and metad

mcp-use is a development framework designed for building, deploying, and managing servers, clients, and autonomous agents using the Model Context Protocol. It provides a comprehensive toolkit for creating servers that expose custom tools, data resources, and prompts to compatible AI agents. The project distinguishes itself by offering a complete lifecycle for protocol-based applications, including a dedicated hosting platform for production servers and a compliance validator to ensure servers meet marketplace publishing requirements. It also features an observability suite for tracing protoco

Ethical-Hacking-Labs is a comprehensive cybersecurity training curriculum and lab suite designed for learning penetration testing, network analysis, and offensive security techniques. It provides a structured environment for practicing the full attack lifecycle, from initial reconnaissance and scanning to exploitation and post-compromise analysis. The project provides instructional materials and guided exercises that cover specific technical domains, including open source intelligence research and network security courseware. It includes a practical workbook for identifying system vulnerabili

This project is a comprehensive educational guide and framework for building web scrapers using Python. It provides a course-based approach to data extraction, combining a Python crawler framework with tutorials on web reverse engineering and network traffic analysis. The project distinguishes itself by covering advanced extraction challenges, including the decryption of obfuscated JavaScript and the bypass of anti-scraping measures. It specifically addresses mobile application scraping through the simulation of user interactions and the interception of network traffic. The capability surfac

Tproxy is a set of command-line utilities designed for throttling bandwidth, simulating network latency, proxying TCP traffic, and analyzing connection stability. It provides a toolset for redirecting network traffic from local ports to remote destinations while monitoring the resulting connection behavior. The project differentiates itself by combining traffic manipulation with diagnostic monitoring. It can introduce configurable packet delays and cap upload and download transfer speeds to simulate constrained or low-bandwidth network environments. Beyond traffic control, the utilities incl

rpcx is a high-performance remote procedure call framework for building scalable microservices in Go. It functions as a binary protocol RPC system and a service mesh, providing the necessary infrastructure for low-latency inter-service communication and distributed cloud environments. The project features a cross-language service gateway that provides an HTTP entry point, allowing clients written in any programming language to invoke Go remote services via protocol translation. It also includes a specialized RPC traffic analyzer for capturing and analyzing binary packets to debug network comm

Hetty is an HTTP intercepting proxy and web security research toolkit used to capture, inspect, and modify traffic between a browser and a server. It functions as an HTTP request editor for creating and replaying manual requests to test server behavior and as a project-based traffic logger that isolates network logs across different security research engagements. The tool provides a request-response interception loop that pauses outgoing requests and incoming responses in transit, allowing for manual editing or cancellation. It includes a manual request replay engine to construct and transmit

PCAPdroid is an Android network traffic analyzer and packet capture tool that operates without requiring root access. It functions as a VPN-based firewall and network controller, capable of recording traffic in PCAPng format and blocking connections to specific domains or malicious hosts. The project distinguishes itself through a proxy-based system for decrypting TLS traffic and routing device network traffic through SOCKS5 proxies or the Tor network. It further allows for the modification of live HTTP requests and responses via custom scripts. Its capabilities cover application connection

Strix is an automated security research and vulnerability scanning platform that leverages language models to orchestrate complex security analysis tasks. It functions as a comprehensive framework for penetration testing and continuous security integration, allowing users to embed automated vulnerability research directly into development pipelines or execute it within isolated, containerized environments. The platform distinguishes itself through a multi-agent orchestration engine that coordinates specialized autonomous agents to perform parallel security assessments. By integrating LLM-agno

Scapy is a network packet manipulation tool and protocol analysis suite designed for crafting, sending, sniffing, and dissecting network traffic. It functions as a framework for building custom network tools that interact directly with low-level packet headers and payloads, enabling users to perform security research and network diagnostics. The system distinguishes itself through a layer-based construction model that allows users to define protocols as stacked objects, which automatically handle checksums and field offsets. It utilizes dynamic field reflection to map packet structures to bin

This application is a desktop network traffic analyzer that provides real-time monitoring and forensic inspection of data packets. By interfacing directly with low-level system drivers, it captures raw network traffic from physical or virtual adapters to identify communication patterns, track bandwidth usage, and diagnose connectivity issues. The system distinguishes itself through an immediate-mode graphical interface that rebuilds the display state every frame, ensuring high responsiveness during live data updates. It maintains performance by using asynchronous message passing to decouple t

Keploy is an automated testing platform that leverages kernel-level traffic interception to generate and maintain regression test suites for microservices. By capturing live network traffic and system calls via eBPF, the platform automatically creates deterministic test cases and mocks external dependencies without requiring manual code instrumentation. This approach allows developers to validate application behavior and API contracts by replaying production-like traffic in isolated environments. The platform distinguishes itself through its use of machine learning to perform test maintenance

Bettercap is a modular framework designed for network reconnaissance, security testing, and the execution of man-in-the-middle attacks. It functions as a comprehensive utility for surveying wired and wireless network segments, identifying connected devices, and analyzing communication protocols through real-time traffic interception and manipulation. The platform distinguishes itself through an event-driven architecture that coordinates network state changes and packet-level data through a centralized message pipeline. It provides a programmable scripting engine and an API for orchestrating s

This project is a command-line utility designed for HTTP load testing and network stress testing. It functions as a benchmarking tool that generates high volumes of concurrent traffic to evaluate the performance, reliability, and throughput capacity of web applications and APIs under sustained load. The tool allows for precise control over traffic generation by enabling users to configure request parameters, including custom headers, authentication credentials, and specific HTTP methods. It manages load through a worker-pool system that regulates request frequency, allowing for both time-boun

nghttp2 is a suite of low-level C libraries and tools designed for implementing the HTTP/2 protocol. It provides a memory-efficient implementation of the protocol's core logic, including framing, stream multiplexing, and flow control. The project includes a dedicated library for HPACK header compression and decompression to reduce network bandwidth. It also provides a toolset for analyzing network traffic and benchmarking server performance, including throughput and latency measurements. Its broader capabilities cover protocol implementation and traffic management, including ALPN connection

uBlock is a browser content blocker and web privacy tool designed to prevent advertisements and tracking scripts from loading. It functions as a network request filter, a DOM element hider, and a script execution controller to manage how web pages load and render. The project distinguishes itself through a combination of network-level request interception and cosmetic filtering. It uses declarative filter lists and pattern-based matching to block trackers and pop-ups, while employing CSS selectors and wildcard entity matching to remove visual components across multiple regional domain variant

ESP32Marauder is a suite of specialized firmware images and tools designed for wireless network auditing, packet sniffing, and Bluetooth scanning on ESP32 hardware. It functions as a wireless penetration tool used to analyze network security and monitor signal traffic. The project includes capabilities for capturing wireless handshakes and simulating access points to test infrastructure resilience. It also features a Bluetooth low energy scanner used to identify hardware signatures and detect unauthorized signals or skimming devices. The firmware supports broader security operations includin

This project is a comprehensive Python network request framework designed for both synchronous and asynchronous HTTP communication. It provides a high-performance client capable of executing non-blocking requests within event-driven applications, while also supporting standard blocking calls for simpler scripts. The library is built to operate natively across diverse asynchronous runtimes, automatically detecting and utilizing the underlying event loop for concurrency. What distinguishes this library is its modular architecture, which decouples request construction from network execution thro

This project is a service mesh platform designed to manage, secure, and observe service-to-service communication within Kubernetes clusters. It functions as a control plane that orchestrates transparent sidecar proxies, which intercept and manage network traffic to provide reliable connectivity for microservices. By automating the injection of these proxies, the platform ensures that infrastructure-level policies are applied consistently across all workloads without requiring manual configuration changes. The platform distinguishes itself through its focus on zero-trust security and cross-clu

Axios is an isomorphic, promise-based HTTP client designed for making asynchronous network requests across different JavaScript execution environments, including the browser and Node.js. It functions as a JSON API client that serializes JavaScript objects into JSON and parses server responses into structured data. The project features a system for managing reusable client instances with shared configurations, such as base URLs and default settings. It includes a mechanism for intercepting outgoing requests and incoming responses globally, allowing data to be transformed before it reaches the

VictoriaMetrics is a high-performance, scalable time series database and observability platform designed for long-term storage and analysis of metric, log, and trace data. It functions as a unified backend for monitoring ecosystems, offering full compatibility with industry-standard protocols and query languages. The system is built to handle massive data volumes through a distributed architecture that supports horizontal scaling and efficient data lifecycle management. The platform distinguishes itself through a storage engine that utilizes consistent hashing for data sharding and log-struct

Vector is a high-performance observability data pipeline designed to collect, transform, and route logs, metrics, and traces across distributed infrastructure. It functions as a modular engine that decouples data ingestion from processing and transmission, utilizing a component-based architecture to connect diverse sources to multiple destinations. The project distinguishes itself through a focus on reliability and flow control. It implements backpressure-aware data movement to prevent data loss during traffic spikes and utilizes disk-backed event buffering to ensure durability during network

Trojan-go is a network proxy implementation that uses the Trojan protocol to disguise internet traffic as standard TLS to bypass censorship and deep packet inspection. It functions as a tunneling gateway that encapsulates network data within encrypted tunnels to mimic ordinary web browsing. The project distinguishes itself through advanced obfuscation techniques, including TLS fingerprint mimicry to avoid detection by client signature identification and the use of WebSockets to relay encrypted traffic through content delivery networks. It also supports UDP forwarding through the Trojan protoc