Active Directory (AD) and Entra ID remain the primary identity stores attackers exploit for lateral movement and privilege escalation.
The eight tools below help security teams uncover misconfigurations, toxic privilege combinations, and indicators of compromise (IOCs) before adversaries do.
Each pick was selected for its detection depth, reporting quality, and enterprise adoption.
🛡️ Best Active Directory Security Assessment Tools of 2026
| Security Tool | Key Capabilities & Features | Best For |
|---|---|---|
| BloodHound Enterprise Attack Path | Attack-path visualization pioneer with automated remediation converting risky edges into prioritized tasks. Continuous scans cover on-prem AD and Azure AD, mapping millions of relationships to reveal shortest path to Domain Admin in real-time. ✓ Validation Mode verifies fixes remove attack paths ✓ Real-time relationship mapping ✓ Automated remediation workflows | Enterprise security teams needing comprehensive attack-path analysis and automated remediation workflows for both on-premises and cloud AD environments. |
| Tenable Identity Exposure AI-Powered | AI-driven exposure analysis ingesting AD objects, GPOs, and ACLs with hundreds of detection rules producing exposure graphs with business-risk scoring. Integration with Tenable Exposure AI predicts exploitability and suggests least-privilege baselines. ✓ Business-risk scoring and prioritization ✓ MITRE ATT&CK mapping ✓ Board-level reporting dashboards | Organizations requiring AI-powered risk assessment with executive reporting and integration into broader Tenable vulnerability management ecosystems. |
| Purple Knight Free Tool | Best free scanner – lightweight, agent-less executable running 100+ Indicators of Exposure and Compromise across on-prem AD, Entra ID, and Okta. Version 4.x adds Kerberos delegation checks and tier-0 drift detection. ✓ Color-coded executive “grade” results ✓ Exportable JSON reports for SIEM ingestion ✓ No cost or installation required | Budget-conscious organizations, initial security baselines, third-party risk assessments, and teams needing quick AD health checks without financial commitment. |
| PingCastle Offline | Single-file health-check analyzing trust relationships, obsolete protocols, and privilege-escalation paths with Technical Score, Maturity Score, and Risk Level assignments. Flags insecure LDAP channel binding and shadow credentials. ✓ Runs entirely offline for air-gapped networks ✓ Comprehensive trust relationship analysis ✓ Multi-dimensional scoring system | Highly regulated environments with restricted outbound traffic, air-gapped networks, and organizations requiring offline AD security assessments. |
| Microsoft Defender for Identity Native | Domain controller sensor-based monitoring streaming Kerberos, NTLM, and LDAP events to Defender portal. Service Account Discovery feature inventories gMSAs, sMSAs, and user-based service accounts. ✓ Real-time authentication monitoring ✓ MITRE ATT&CK technique mapping ✓ Unified Microsoft 365 Secure Score integration | Microsoft-centric environments wanting native integration with M365 security stack, real-time monitoring, and unified security scoring across workloads. |
| Netwrix StealthAUDIT Remediation | Permission analyzer with automated remediation enumerating effective rights across OUs, GPOs, and SMB shares. Built-in scripts remove SIDHistory, disable stale accounts, and clean zombie GPO links. ✓ Effective rights visualization ✓ Hybrid attack-path visualizations ✓ Tier-model mapping and automated cleanup | Organizations needing deep permission analysis with automated remediation capabilities, especially for complex hybrid environments with extensive GPO structures. |
| ManageEngine ADAudit Plus Real-time | Real-time change and logon auditing collecting Windows Event IDs, correlating to threat scenarios, and triggering email/syslog alerts. Dashboards show account-lockout trends, DCSync attempts, and pass-the-ticket traces. ✓ Affordable per-DC pricing model ✓ Real-time alerting and correlation ✓ Threat scenario mapping | Mid-market organizations requiring cost-effective real-time AD monitoring with threat correlation and immediate alerting capabilities. |
| Quest Change Auditor Forensic | Tamper-proof change recording capturing every AD modification with before/after values in secure database. Instant alerts for high-risk actions like disabling domain controllers or modifying admin groups. ✓ IOC correlation for ransomware behavior ✓ REST API for SIEM integration ✓ Forensic-grade audit trails | Compliance-heavy industries requiring forensic-grade audit trails, tamper-proof change logs, and detailed before/after documentation for regulatory requirements. |
Use This Tool For a Free AD Risk Assessment (INSTANT RESULTS)
Active Directory Security Assessment
Evaluate your organization’s AD security posture in 2 minutes
1. What is the total number of Active Directory user accounts in your environment?
1. BloodHound Enterprise
BloodHound pioneered attack‑path visualisation, and the Enterprise edition automates remediation by converting risky edges into prioritised tasks.
Continuous scans cover on‑prem AD and Azure AD, mapping millions of relationships to reveal the shortest path to Domain Admin in real time. A Validation Mode verifies that each fix truly removes the path before closing the finding.
2. Tenable Identity Exposure
Tenable Identity Exposure ingests AD objects, GPOs, and ACLs, applies hundreds of detection rules, and produces an exposure graph with business‑risk scoring.
Integration with Tenable Exposure AI predicts exploitability and suggests least‑privilege baselines. Dashboards align findings with MITRE ATT&CK and CIS controls for board‑level reporting.
3. Purple Knight — Best Free Scanner
Purple Knight is a lightweight, agent‑less executable that runs more than 100 Indicators of Exposure and Indicators of Compromise across on‑prem AD, Entra ID, and Okta.
Version 4.x adds Kerberos delegation checks, tier‑0 drift detection, and exportable JSON reports for SIEM ingestion. Colour‑coded results make it the fastest way to get an executive “grade” on AD security without cost or installation.
4. PingCastle
PingCastle’s single‑file health‑check analyses trust relationships, obsolete protocols, and privilege‑escalation paths, then assigns a Technical Score, Maturity Score, and Risk Level.
The current rule‑set flags insecure LDAP channel binding and shadow credentials. Because it runs entirely offline, PingCastle is popular in highly regulated networks where outbound traffic is restricted.
5. Microsoft Defender for Identity
Defender for Identity uses domain controllers as sensors, streaming Kerberos, NTLM, and LDAP events to the Defender portal.
A new Service Account Discovery feature inventories and classifies gMSAs, sMSAs, and user‑based service accounts. Alerts map to MITRE techniques and contribute to the unified Secure Score across Microsoft 365 workloads.
6. Netwrix StealthAUDIT
StealthAUDIT’s permission‑analyser enumerates effective rights so admins can see who really controls critical OUs, GPOs, and SMB shares. Built‑in remediation scripts remove SIDHistory, disable stale accounts, and clean zombie GPO links. The latest release adds hybrid attack‑path visualisations and tier‑model mapping.
7. ManageEngine ADAudit Plus
ADAudit Plus focuses on real‑time change and logon auditing. It collects Windows Event IDs, correlates them to threat scenarios, and triggers email or syslog alerts.
New dashboards show account‑lockout trends, DCSync attempts, and pass‑the‑ticket attack traces. Affordable per‑DC pricing makes it attractive for mid‑market IT.
8. Quest Change Auditor
Change Auditor records every AD change with before/after values, storing events in a tamper‑proof database and raising instant alerts for high‑risk actions such as disabling a domain controller or modifying admin‑group membership. Recent enhancements include IOC correlation for ransomware behaviour and a REST API for SIEM integration.
Frequently Asked Questions
Why do I need a dedicated AD security‑assessment tool?
Native Windows tools expose only basic logs and cannot correlate trust paths, ACL inheritance, or hybrid‑identity drift. Purpose‑built scanners surface these hidden attack vectors quickly, helping organisations meet frameworks such as NIST CSF and CIS Control 4.
How often should I run an AD security assessment?
Run a full assessment after any forest‑wide change—such as a domain upgrade or merger—and schedule at least a monthly scan to catch drift introduced by routine administration.
Is Purple Knight really free for commercial use?
Yes. Semperis licenses Purple Knight for unlimited use without feature caps, making it ideal for initial baselines or third‑party risk assessments.
What’s the difference between auditing and attack‑path management?
Auditing tools like ADAudit Plus and Change Auditor capture events (who did what, when); attack‑path tools like BloodHound and Tenable model relationships that allow privilege escalation. Using both provides continuous monitoring and structural hardening.
Can these tools secure Entra ID (Azure AD) as well?
BloodHound Enterprise, Purple Knight, Tenable Identity Exposure, and Microsoft Defender for Identity all assess hybrid identity stores, scanning both on‑prem AD and Entra ID for shared exposures.
