30 open-source projects similar to subfinder/subfinder, ranked by shared indexed features. Tags may describe platforms or build tools rather than the same primary purpose. Check each project’s use case, license, and deployment requirements before treating it as a replacement.
Subfinder is a security reconnaissance framework designed for subdomain enumeration and attack surface management. It functions as a discovery engine that identifies and maps internet-exposed infrastructure, cloud-hosted assets, and network ranges to maintain a comprehensive inventory of an organization's digital footprint. The project distinguishes itself through a modular, template-driven scanning engine that executes security checks against discovered assets. It leverages cloud-native asset discovery to query provider APIs and infrastructure metadata, while supporting distributed agent orc
Sublist3r is a subdomain enumeration tool and passive reconnaissance framework designed to discover subdomains by querying search engines and public intelligence sources. It functions as a security tool for identifying the digital footprint of a target domain. The project provides both passive enumeration through multi-source API aggregation and active discovery via a DNS brute force tool. It includes a TCP port scanner to identify active services and open ports on discovered subdomains, facilitating attack surface mapping. The tool can be used as a standalone utility or as a Python security
reconftw is an attack surface management framework and reconnaissance workflow orchestrator designed to automate the discovery, mapping, and monitoring of external digital assets. It operates as a modular tool-chain pipeline that coordinates a sequence of security tools to perform intelligence gathering and vulnerability scanning. The project distinguishes itself through a cloud-native deployment model that parallelizes scanning workloads across a fleet of remote VPS instances to bypass local resource constraints. It utilizes container-based environment isolation to ensure consistent executio
Amass is a network attack surface mapper and reconnaissance framework designed to discover and map the external, internet-facing infrastructure of a target organization. It functions as an open source intelligence tool that identifies public network boundaries and locates hidden or forgotten subdomains to define an organization's total reachable footprint. The project utilizes passive-source data aggregation from external APIs and public databases alongside active DNS brute-forcing and recursive subdomain expansion. It employs a graph-based asset mapping system to visualize the relationships
Naabu is a port scanner library and tool that probes hosts for open ports using SYN, CONNECT, and UDP methods to identify active services. It functions as a Go library for embedding port scanning into programs, and as a standalone tool that accepts targets as hostnames, IP addresses, CIDR ranges, or ASN numbers. The tool discovers live hosts before scanning, filters ports by range or top lists, and can integrate with Nmap for service version detection. The project distinguishes itself through its SYN-based port probing approach that sends TCP SYN packets and analyzes responses without complet
Gobuster is a command-line security utility designed for brute-force discovery of hidden infrastructure and content. It operates by systematically testing wordlists against target network services to identify files, directories, subdomains, and cloud storage buckets. The tool utilizes a concurrent worker pool to execute these requests in parallel, ensuring efficient scanning across various network environments. The project distinguishes itself through a modular plugin architecture that supports multiple discovery modes, including HTTP, DNS, and TFTP. This design allows for protocol-agnostic r
Knock is an attack surface management tool and DNS reconnaissance framework used for discovering and mapping an organization's external infrastructure. It functions as a subdomain enumeration tool and HTTP security scanner to identify reachable hosts and organizational assets. The project distinguishes itself by using a passive-active hybrid enumeration strategy, combining external API lookups with active wordlist brute-force attacks and DNS zone transfers. It includes a multi-stage validation pipeline that detects DNS wildcard records and verifies host connectivity to filter out false positi
Findomain is a subdomain enumeration and infrastructure analysis tool designed for attack surface mapping. It functions as a DNS reconnaissance suite that discovers subdomains using multiple data sources and API keys to identify the full extent of a target network. The system acts as an attack surface monitor by tracking subdomain changes over time and sending real-time alerts via webhooks when new assets are detected. It includes specialized capabilities for detecting DNS wildcards to filter false positives and resolving subdomain IPs through parallel resolution. The tool provides a workflo
This project is an open-source intelligence reconnaissance framework and recursive attack surface mapper. It functions as a containerized security scanner designed to map public-facing infrastructure, perform subdomain enumeration, and automate the gathering of open-source intelligence. The system employs a recursive discovery engine to iteratively explore target infrastructure, utilizing a plugin-based module architecture to extend scanning capabilities. It integrates third-party APIs for data enrichment and applies YARA rules across discovered assets to identify specific vulnerability patte
Sn1per is a vulnerability management platform and penetration testing orchestrator designed to automate reconnaissance, vulnerability scanning, and exploit verification. It functions as a dockerized security toolkit that coordinates multiple tools into a unified automated pipeline to identify security flaws across network and web assets. The platform features an attack surface manager for discovering internet-facing assets through OSINT, DNS enumeration, and certificate transparency. It distinguishes itself with an AI-powered security analyzer that uses large language models to summarize scan
Amass is an attack surface management tool designed to identify, map, and inventory an organization's internet-facing digital assets. It functions as a security asset discovery engine that systematically expands an organization's known infrastructure footprint through recursive domain name resolution and the collection of intelligence from diverse public data sources. The platform distinguishes itself by utilizing a graph-based modeling approach to organize discovered resources. By maintaining a persistent graph database, it tracks the relationships between infrastructure components and norma
RED_HAWK is a penetration testing framework and reconnaissance suite designed for information gathering and vulnerability assessment. It provides a toolkit for infrastructure reconnaissance, technology stack detection, automated web spidering, and security scanning. The project distinguishes itself through a multi-stage reconnaissance pipeline that maps attack surfaces. This includes DNS-based infrastructure mapping to resolve network layouts and pattern-based detection to identify specific content management systems and server stacks. The system covers a broad range of capabilities includin
Findomain is a subdomain discovery tool and DNS resolver used for mapping an organization's external attack surface. It functions as a DNS infrastructure analyzer that searches for registered subdomains associated with a root domain to uncover undocumented infrastructure and services. The project includes an attack surface monitor that tracks changes to subdomains over time, using differential state monitoring to identify newly created or deleted assets. It provides real-time alerting via webhooks when changes in the monitored domain surface are detected. The system performs high-speed DNS r
Nettacker is an automated penetration testing framework designed to orchestrate reconnaissance, port scanning, and vulnerability detection. It functions as a network reconnaissance tool and vulnerability scanner that identifies open ports, fingerprints services, and checks systems against databases of known security flaws. The framework distinguishes itself by combining a web application crawler for discovering hidden paths via fuzzing with a vulnerability management system that persists scan results in a database to track historical assessments. It also includes specialized capabilities for
Nuclei is a modular security scanning framework designed for automated vulnerability detection and infrastructure reconnaissance. It functions as a template-driven engine that executes security checks across diverse network protocols, allowing users to define custom detection logic to identify vulnerabilities, misconfigurations, and exposed assets. The platform distinguishes itself through its highly extensible architecture, which supports distributed scanning, headless browser automation for dynamic web content, and out-of-band interaction monitoring to detect blind vulnerabilities. It integ
Waybackurls is a command-line OSINT tool that retrieves every known URL for a given domain from the Wayback Machine archive. It functions as a domain reconnaissance utility, discovering forgotten API endpoints, legacy pages, and hidden files by querying the public web archive API. The tool processes domains independently and statelessly, reading domain names from standard input and streaming discovered URLs line-by-line to standard output. This design enables seamless integration into Unix command pipelines, allowing users to chain waybackurls with other tools for filtering, sorting, and furt
Feroxbuster is an HTTP directory brute forcer and web resource enumerator designed to discover hidden files and directories on web servers. It functions as a recursive URL scanner that identifies unlinked endpoints and API resources by combining wordlist-based scanning with automated crawling. The tool operates as a proxy-aware fuzzer, allowing network requests to be routed through HTTP or SOCKS proxies for traffic interception or anonymity. It utilizes recursive directory crawling to automatically queue discovered paths and find nested content. The system includes capabilities for discovery
This project is an automated security testing suite designed to detect and exploit database vulnerabilities. It functions as a command-line utility that streamlines the identification, verification, and exploitation of web application flaws by automating the injection of malicious payloads into input parameters. The tool provides a comprehensive framework for database enumeration, allowing users to extract schema information, user data, and system configurations from identified injection points. What distinguishes this tool is its sophisticated engine for dynamic payload adaptation and heuris
Photon is a command-line web crawler designed for security reconnaissance and information gathering. It systematically traverses websites to discover URLs, map domain infrastructure, and identify associated subdomains by retrieving DNS records. The tool distinguishes itself through its ability to perform deep content analysis, including the extraction of sensitive data such as API keys and authentication tokens using user-defined regular expressions. It supports offline inspection by cloning crawled web content to the local filesystem, allowing for structural analysis without additional netwo
Anubis is a command-line security reconnaissance framework designed for subdomain enumeration and attack surface mapping. It functions as a utility for security professionals to identify, catalog, and visualize the external digital footprint of an organization by discovering all subdomains associated with a target domain. The tool distinguishes itself through a modular resolver pipeline that integrates passive reconnaissance from third-party security APIs and public certificate transparency logs. It combines this data with active discovery methods, including recursive DNS brute-forcing and al
Subfinder is a passive subdomain enumeration tool and DNS discovery utility designed to identify valid subdomains and hostnames associated with a specific organization or domain. It functions as a passive reconnaissance tool, gathering information about target domains by querying online databases without sending network traffic to the target infrastructure. The tool utilizes a pluggable provider architecture to separate discovery logic into independent modules, allowing for the integration of multiple passive-source APIs. It employs a concurrent-worker request model to execute network request
Rengine is an automated reconnaissance framework and vulnerability management platform designed for attack surface monitoring. It functions as a centralized hub for discovering subdomains and open ports, gathering open-source intelligence, and tracking security flaws across target networks. The system integrates large language models to analyze reconnaissance data and generate vulnerability descriptions and insights. It distinguishes itself through a plugin-based tool integration that wraps external security scanning binaries and a target mapping system that tracks changes to assets over time
ScopeSentry is a distributed attack surface management platform designed to catalog digital assets and automate security assessments across large network environments. It functions as a network asset discovery tool and vulnerability scanner, providing a framework for maintaining visibility over organizational infrastructure. The platform distinguishes itself through a distributed architecture that orchestrates worker nodes to execute security tasks in parallel. It utilizes an event-driven discovery process to identify new assets and subdomains, maintaining a stateful record of configurations
recon-ng is an open source intelligence reconnaissance framework designed to automate the collection and aggregation of public information. It is a modular intelligence tool that utilizes a system of pluggable modules to harvest target data, resolve DNS queries, and parse web content. The framework is built as an API-driven tool with a programmatic interface to integrate with other security workflows. It is provided as a containerized application, using Docker to ensure a consistent environment for running reconnaissance tasks and managing a persistent data store. Its capabilities cover exte
OWASP ZAP is a dynamic application security testing tool and intercepting HTTP proxy used to find vulnerabilities in web applications. It functions as a penetration testing framework that enables both automated security scanning and manual security testing of running web services. The tool provides a suite of capabilities for analyzing web applications from the outside in, including the ability to capture and modify traffic between a browser and a target application. It is designed to integrate into DevSecOps pipelines to provide consistent security checks across different environments.
Gowitness is a system for rendering web interfaces at scale to capture visual snapshots, HTTP metadata, and network scan results. It functions as a headless browser screenshot tool and a web surface mapper used to identify and visually document the attack surface of network ranges and URL lists. The tool includes a screenshot gallery server that provides a web-based interface for browsing, filtering, and managing a database of captures. It specifically serves as an Nmap target visualizer, parsing network scan results to automatically capture screenshots of discovered web services. Capabiliti
Full-featured C2 framework which silently persists on webserver with a single-line PHP backdoor
A tool for bug hunting or pentesting for targeting websites that have open .git repositories available in public
A virtual host scanner that performs reverse lookups, can be used with pivot tools, detect catch-all scenarios, work around wildcards, aliases and dynamic default pages.
Keyscope is a key and secret workflow (validation, invalidation, etc.) tool built in Rust