Best Nemesis Alternatives & Competitors in 2026

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Breach and attack simulation platform for security validation

Security Validation Platform

Security validation platform that simulates attacks to test security controls

Prelude Security Control Validation

Continuous security control validation platform testing EDR against adversary TTPs.

Ridge Security RidgeBot

AI-driven platform for automated pentesting and security validation.

Ridge Security RidgeBot ACE

Adversary emulation tool that validates security control effectiveness via MITRE ATT&CK.

SCYTHE Managed BAS Service

Managed adversarial emulation & validation service for continuous security testing.

Aether AI

AI-driven platform that continuously simulates attacks to find vulnerabilities.

RedMimicry

Breach and attack emulation platform that mimics real threat actors.

Cybral STORM ATTACKER

BAS tool that validates exploit paths via safe, controlled attack simulations.

PT Dephaze

Agentless automated pentest platform for continuous infrastructure security testing.

Keysight Security Attack Emulation

Multi-product platform for attack emulation, BAS, and security control validation.

AttackIQ Adversarial Exposure Validation

Continuous security control validation platform using adversary emulation

ZAIUX ZAIUX® Evo

SaaS BAS platform automating C2 attacks with AI-driven remediation plans

SafeBreach Exposure Validation Platform

Exposure validation platform combining BAS and attack path validation (CART)

Pentera Pentera Platform

Automated security validation platform for testing attack surfaces continuously

Pentera RansomwareReady™

Automated ransomware attack emulation platform for defense validation

Pentera Credential Exposure

Tests leaked/stolen credentials against attack surfaces to identify exposures

Pentera Pentera Core

Automated internal network penetration testing and security validation platform

Pentera Attack Surface Monitoring

Attack surface monitoring platform with automated security validation testing

Pentera Cloud Security

Automated security validation platform for cloud environments

CovertSwarm Ransomware Attack Simulation

Ransomware attack simulation service to test security defenses and response

SafeBreach Validate

Breach and attack simulation platform for testing security controls

NetSPI Detective Controls Testing

Validates detective security controls through attack simulations and testing

Keepnet Labs Email Threat Simulator

Tests email security gateways by simulating real-world email threats

Filigran OpenAEV

Open-source threat-informed exposure validation platform for attack simulation

HUMAN Defense Platform

Platform for detecting & preventing ad fraud, bot attacks, & account fraud

Picus Cloud Security Validation

Cloud security validation platform for auditing & simulating attacks on AWS/Azure/GCP

SightGain Automated Cybersecurity Assessments

Automated platform for testing cybersecurity controls against real threats

SightGain Threat Exposure Management Platform

Automated threat exposure mgmt platform for continuous security assessments

SightGain Cyber Risk Analytic Software

Automated cyber risk assessment platform using threat emulation and analytics

Mitigant Cloud Attack Emulation

Cloud attack emulation platform for validating AWS security controls

EDR Healthcheck

Validates EDR detection capabilities through autonomous penetration testing

FourCore ATTACK

FourCore ATTACK is an adversary emulation platform to manage cyber risk with evidence

BreachBits BreachRisk™

AI-powered cyber risk emulation platform for insurance & enterprise.

Onward Security DDoS Attack & Defense Drill

DDoS attack simulation & defense validation service for enterprises.

HERCULES SecDDoS

Cloud-based DDoS attack simulation & monitoring platform for defense testing.

rThreat

Platform for simulating known/unknown threats to test security controls.

Skyhawk Breach and Attack Simulation

Cloud BAS tool that continuously simulates attacks to identify exploitable paths.

Skyhawk Red Team-as-a-Service

Continuous AI-based cloud red teaming via digital twin simulation.

Armadin AI Cybersecurity Platform

Autonomous AI platform that simulates multi-phase attack campaigns to find kill chains.

Hackurity ART Stack

Autonomous red teaming stack for recon, pentesting, threat intel & brand defense.

Infection Monkey

An open-source security tool that simulates network breaches by self-propagating across data centers to test organizational resilience against lateral movement attacks.

Keysight BreakingPoint

Security and application traffic generator for high-scale network security testing.

Keysight CyPerf

Cloud-native test for application experience, security efficacy, and performance.

Keysight Cyber Training Simulator

Cyber range for hands-on security operations training and incident-response drills.

APT Simulator

APT Simulator is a tool for simulating a compromised system on Windows.

Network Flight Simulator (flightsim)

A utility to generate malicious network traffic for security evaluation.

Red Team Automation (RTA)

A Python-based framework that generates evidence of MITRE ATT&CK tactics to help blue teams test their detection capabilities against simulated malicious activities.