Best Siemba EASM Alternatives & Competitors in 2026

Cyber Exposure Manager

Cyber Exposure Manager: continuous visibility and remediation for external risk

Detectify Surface Monitoring

Monitors internet-facing subdomains for vulnerabilities and misconfigurations

Strobes Attack Surface Management

Platform for continuous attack surface discovery, monitoring, and remediation

CyberXTron ShadowSpot

External attack surface management platform for asset discovery and risk detection

GoSecure Titan® Attack Surface Management

Discovers, monitors, and assesses external attack surface assets continuously.

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

MokN Lantern

EASM platform for continuous external attack surface monitoring and detection

Guardz External Footprint

External attack surface monitoring with dark web intelligence and scanning

Edgescan Attack Surface Management (ASM)

External attack surface management platform for asset discovery and monitoring

RiskProfiler - Attack Surface Management

AI-powered EASM platform for discovering and prioritizing external risks

crt.guru

External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports.

Threat Surface - Attack Surface Management

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

ImmuniWeb® Discovery

ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.

Intruder Attack Surface Management

Attack surface mgmt platform with vuln scanning and cloud security features

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

Red Sift Red Sift Radar

LLM-powered security platform for finding and fixing security gaps

CyCognito Remediation

External attack surface mgmt platform with remediation acceleration features

Vulneri ASM

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

Assetnote Attack Surface Management Tool

ASM platform that scans external attack surfaces hourly for vulnerabilities

Outpost24 External Attack Surface Management

Cloud platform for continuous visibility & mgmt of external attack surfaces

StrikeOne Attack Surfa

AI-powered attack surface management platform for cybersecurity monitoring

Hadrian Agentic AI

AI-powered platform for continuous attack surface discovery and pentesting

Microsoft Defender EASM

Discovers and monitors external-facing assets and vulnerabilities

Halo Security Attack Surface Management

External attack surface mgmt platform for discovering & monitoring assets

Assetnote ASM

External attack surface management platform with continuous asset discovery

Censys Internet Map

Internet intelligence platform for asset discovery and attack surface mapping

Risksurface

SaaS platform for attack surface management and vulnerability detection

QuimeraX External Attack Surface Management

EASM platform for continuous monitoring of internet-exposed assets & vulnerabilities

RiskXchange Attack Surface Management

Attack surface management platform for monitoring vulnerabilities and breaches

Mandiant Attack Surface Management

Discovers and monitors external internet assets for exposures and vulnerabilities

Zerofox External Attack Surface Management

Discovers and manages internet-facing assets with vulnerability prioritization

Pentera Surface

External attack surface mgmt with automated pentesting and validation

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

Synack Attack Surface Discovery

External attack surface mgmt with asset discovery and on-demand pentesting

Censys Internet Intelligence Platform

Internet intelligence platform for asset discovery and threat analysis

Censys AI-Driven Solutions

AI-driven internet scanning platform for asset discovery and threat hunting

Anomali Attack Surface Management

External attack surface management platform for asset discovery and vuln mgmt

Axur Unified EASM + CTI

EASM platform with integrated CTI for asset discovery and vulnerability mgmt

Cytrusst Cyber Attack Surface Management

Attack surface management platform with dark web & brand monitoring capabilities

DarknetSearch Attack Surface Discovery

Attack surface discovery platform monitoring digital assets and data exposures

Wallarm API Attack Surface Management

Agentless API attack surface discovery and vulnerability detection platform

Detectify Platform

Platform for external attack surface management and application security testing

Halo Security External Attack Surface Management

External attack surface management platform for asset discovery and monitoring

NetSPI External Attack Surface Management (EASM)

Continuous discovery, monitoring, and testing of external assets and exposures