Best Amass 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.

SurfaceDiff

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

Findomain

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

assetfinder

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

ScanCannon

A Python-based tool for external attack surface discovery and reconnaissance across large-scale networks, focusing on IP address and subdomain enumeration.

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

Muscope|Risk - Attack Perimeter

Maps external attack surface including assets, dark web exposure, and leaks.

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.

Attack Surface Scan

Agentless external attack surface monitoring with continuous change detection.

FestIn

FestIn discovers open S3 buckets associated with a domain using crawling and DNS reconnaissance techniques.

domfind

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

Recon-ng Framework

A full-featured reconnaissance framework for web-based reconnaissance with a modular design.

findmytakeover

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

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-enumeration

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

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.

autoSubTakeover

A tool to identify potential subdomain takeovers by checking if a CNAME record resolves to the scope address.

cnames

A tool for taking a list of resolved subdomains and outputting any corresponding CNAMES en masse.

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

Censys Internet Map

Internet intelligence platform for asset discovery and attack surface mapping

SOC Radar DNS Monitoring

SOCRadar DNS Monitoring provides real-time monitoring of DNS infrastructure with automated discovery, record change alerts, and detection of DNS-based security threats.

SOC Radar Attack Surface Management

SOCRadar Attack Surface Management is an EASM platform that continuously discovers, monitors, and assesses internet-facing digital assets for vulnerabilities and security risks.

Matos Automated Attack Surface Management

Automated ASM tool for multi-cloud environments with continuous asset discovery

Palo Alto Networks Cortex Xpanse

Active attack surface mgmt solution for discovering & remediating unknown risks

Akamai DNS Posture Management

DNS security posture management across multicloud and on-prem environments

Halo Security Attack Surface Discovery

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

Trickest ASM - Attack Surface Management

Customizable ASM platform for asset discovery, monitoring, and enrichment

Intruder Discover Attack Surface

Attack surface management platform for discovering and securing exposed assets

Guardz External Footprint

External attack surface monitoring with dark web intelligence and scanning

Ceeyu Digital Footprint Monitoring

Automated digital asset discovery and monitoring for external attack surface

Edgescan Attack Surface Management (ASM)

External attack surface management platform for asset discovery and monitoring

Zerocopter Recon

External attack surface mapping service to discover exposed digital assets

ConnectSecure Attack Surface Scanning

External attack surface scanning for MSPs to identify vulnerabilities

Aleph Search Clear

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

Cobalt Attack Surface Monitoring

Continuous external asset discovery and monitoring with daily domain scans.

Qontrol Avant-Vente

Passive pre-sale domain diagnostic tool for vCISOs, MSPs & MSSPs.

Vulneri ASM

ASM platform for continuous discovery and risk validation of internet-exposed assets.