Best Sublist3r Alternatives & Competitors in 2026

ctlogs.dev

Fast Certificate Transparency search and JSON API for subdomain reconnaissance.

crt.sh

Bash script for subdomain enumeration via crt.sh certificate transparency logs.

Findomain

A domain reconnaissance tool that automates subdomain discovery, port scanning, and monitoring with support for multiple data sources and notification integrations.

Sudomy

A subdomain enumeration tool for bug hunting and pentesting

Searchlight Exposure – Exposure Management

ASM platform that scans external attack surfaces hourly for vulnerabilities

Sn1per Professional 2026

Sn1per Professional 2026: automated penetration testing & attack surface management

Domain Beacon

Provide intelligence about a domain

Detectify Platform

Platform for external attack surface management and application security testing

Detectify Surface Monitoring

Monitors internet-facing subdomains for vulnerabilities and misconfigurations

Halo Security Attack Surface Discovery

Discovers and inventories internet-facing assets including subdomains, IPs, and apps.

Intruder Discover Attack Surface

Attack surface management platform for discovering and securing exposed assets

Ceeyu Digital Footprint Monitoring

Automated digital asset discovery and monitoring for external attack surface

Aleph Search Clear

OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web.

Cylana EASM

AI-powered EASM platform for digital asset discovery and monitoring.

Threat Surface - Attack Surface Management

EASM platform for continuous discovery and risk assessment of external assets.

ThreatDefence Integrated ASM

ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks.

ExposeLens

Domain exposure monitoring tool for leaked creds, subdomains & dark web data.

TRaViS

AI-enhanced EASM platform for external attack surface discovery and monitoring.

SurfaceDiff

Continuous external attack surface monitoring that shows what changed between scans.

Attack Surface Scan

Agentless external attack surface monitoring with continuous change detection.

ArmorPoint Attack Surface Management

Continuous, agentless discovery and threat-intel enrichment of external internet-facing

SECWATCH Exposure Control

Human-validated external attack surface risk prioritization combining scanning

Driftnet Explore

Internet-wide scanning platform for discovering exposed devices, services

DorkSearch

Curated Google dork search tool for OSINT and web reconnaissance.

ZoomEye

ZoomEye is an advanced cyberspace search engine that provides detailed information on cyberspace assets, including server software and version information, for cybersecurity experts, researchers, and enterprises.

Majestic Million

Explore the top million websites, ranked by referring subnets, and gain insights into online influence and popularity.

Amass

Amass is an open-source OWASP tool for comprehensive attack surface mapping and asset discovery through domain reconnaissance and subdomain enumeration.

Cloud_enum

Cloud_enum is a multi-cloud OSINT tool that enumerates publicly accessible resources across AWS, Azure, and Google Cloud platforms for security assessment purposes.

SpiderFoot

Automate OSINT for threat intelligence and attack surface mapping with SpiderFoot.

domfind

Python utility for testing the existence of domain names under different TLDs to find malicious subdomains.

OWASP Amass

Performs network mapping of attack surfaces and external asset discovery using open source information gathering and active reconnaissance techniques.

findmytakeover

A multi-cloud DNS security tool that detects dangling DNS records and potential subdomain takeover vulnerabilities by scanning cloud infrastructure and DNS zones.

CloudBrute

A black-box reconnaissance tool that discovers cloud infrastructure, files, and applications across major cloud providers for security testing purposes.

Projectdiscovery.io | Chaos

A powerful enumeration tool for discovering assets and subdomains.

massdns

A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)

censys-subdomain-finder

A tool for performing subdomain enumeration using Censys API

Turbolist3r

A Python-based tool for subdomain enumeration and analysis

censys-enumeration

A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys.

as3nt

A tool for enumerating subdomains of a given domain

Subra

A simple web-based interface for subdomain enumeration using the subfinder tool.

brutesubs

An automation framework that runs multiple open-source subdomain bruteforcing tools in parallel using Docker Compose and custom wordlists.

Knock

A subdomain scan tool that helps you find subdomains of a given domain.

Subfinder

Fast passive subdomain enumeration tool

assetfinder

A command-line tool for discovering domains and subdomains related to a target domain during reconnaissance activities.

crtndstry

A subdomain finder tool