7 Purple Knight alternatives for AD and identity security

The Netwrix 2025 Cybersecurity Trends Report found that 51% of surveyed organizations experienced a security incident in the past 12 months that required a dedicated response.

Purple Knight helps teams find those weaknesses, and it does that well for a free tool. The 2025 Semperis report reported an average initial Active Directory and Entra ID score of 61 out of 100. Yet it only scans on demand, exports findings rather than feeding a SIEM, and doesn't track remediation.

This guide compares seven Purple Knight alternatives across coverage, continuous monitoring, remediation depth, and deployment fit so you can match a tool to your environment.

Why teams look for Purple Knight alternatives

Purple Knight is a capable assessment tool with documented boundaries that push teams toward alternatives once assessment becomes an ongoing program rather than a one-time check.

• Point-in-time scans miss what happens between runs: Purple Knight scans on demand, so privileged group changes, delegation edits, and Kerberos drift remain invisible until someone runs the next assessment, which prevents it from functioning as a continuous control.
• Limited SIEM integration keeps findings siloed: Purple Knight documents only support export to Microsoft Sentinel, so teams on other SIEM platforms can't route its findings into their alert queues, incident workflows, or correlation rules.
• Single-domain GUI limits scale and automation: Purple Knight needs an interactive Windows GUI and business email registration, with no documented CLI, API, or headless mode for multi-forest rollup or scheduled jobs.
• Assessment depth stops short of remediation and monitoring: Purple Knight scores exposures but doesn't track whether a flagged item was fixed or detect when a remediated setting later regresses.
• A scorecard isn't audit evidence over time: A single Purple Knight scan shows a control was checked once, which doesn't satisfy IT general controls (ITGC) or SOC 2 Type II tests, which require proof that a control operated continuously.

What to look for in a Purple Knight alternative

The right alternative depends on which of those gaps matters most to your team. These four criteria separate the tools that follow and shape which one fits your operating model.

• Point-in-time versus continuous monitoring: Assessment tools give a snapshot of exposure, while continuous monitoring maintains a live baseline and alerts on privilege additions, delegation changes, and Group Policy Object (GPO) edits as they happen.
• AD, Entra ID, and Okta coverage depth: Confirm whether an alternative matches Purple Knight's on-premises AD and Entra ID coverage, closes the Entra gap, or extends to additional identity providers and multi-forest rollup.
• Remediation depth and SIEM integration: Look for tools that push findings to SIEM and SOAR platforms and automate fixes, rather than producing a standalone report that someone must act on manually.
• Deployment model: Teams running on Linux, containers, scheduled jobs, or CI/CD pipelines need a headless CLI or API; confirm agentless versus sensor-based overhead in environments with 100,000 or more objects.

7 best Purple Knight alternatives in 2026

The tools below span free assessment peers, continuous monitoring platforms, and commercial identity security platforms.

1. Netwrix

Netwrix covers Active Directory and Entra ID security in two layers. Netwrix PingCastle runs the free posture assessment that overlaps with Purple Knight, and Netwrix Auditor adds the always-on change auditing that a point-in-time scan can't provide.

Key features:

• Netwrix PingCastle: Free AD assessment that scores risk across stale objects, privileged accounts, trusts, and anomalies, with multi-forest consolidation and headless CLI.
• Netwrix Auditor: Continuous AD and Entra ID change auditing with who, what, when, and where context for users, privileged groups, GPOs, and service accounts.
• Real-time alerting on risky changes: Configurable alerts on privileged group edits, delegation changes, and GPO modifications so teams respond between scans.
• Compliance reporting: Pre-built reports mapped to SOX, HIPAA, PCI DSS, ISO 27001, GDPR, and CMMC, with the time-stamped change history auditors request.
• SIEM and ITSM integration: Forwards structured change events to SIEM platforms and connects to ServiceNow and Splunk.
• Continuous posture scoring: Netwrix ISPM runs 170+ risk checks against AD and Entra ID, maps findings to MITRE ATT&CK, and alerts on configuration drift between assessments

What to consider:

• Netwrix splits assessment and monitoring across two products, so covering the full lifecycle means running both Netwrix PingCastle and Netwrix Auditor rather than a single tool.
• Coverage is deepest in Microsoft AD and Entra ID, so Okta and other non-Microsoft identity providers (IdPs) need validation before you rely on them.

Best for: Microsoft-centric teams that want to assess AD posture and then monitor and prove remediation from one vendor.

2. Cayosoft Guardian Protector

Cayosoft Guardian Protector is an agentless tool for continuous monitoring of Active Directory and Entra ID changes, positioned as a detection layer that runs between Netwrix PingCastle or Purple Knight scans.

Key features:

• Agentless, continuous monitoring of AD and Entra ID for privilege, delegation, group, and policy changes using read-only access.
• Threat monitoring across lateral movement, credential theft, privilege abuse, and non-human identity risk categories.
• Hybrid coverage spanning on-premises AD and Entra ID from a single console.

What to consider:

• Guardian Protector detects and monitors changes but doesn't run a scored posture assessment, so it complements an assessment tool rather than replacing one.
• Coverage centers on Microsoft AD and Entra ID, so it offers little visibility into non-Microsoft identity providers.

Best for: Teams that want always-on AD and Entra monitoring between scans without having to stand up a heavier platform.

3. ManageEngine ADAudit Plus

ManageEngine ADAudit Plus is an Active Directory logon and change auditing platform with hundreds of pre-built reports that give live and historical views of AD activity rather than a discrete vulnerability assessment.

Key features:

• Real-time auditing of logons, account management, and GPO changes with before-and-after values and configurable alerts.
• Pre-built reports for SOX, HIPAA, PCI DSS, GLBA, FISMA, GDPR, and ISO 27001.
• File and storage activity auditing across monitored Windows systems.
• Detections for Kerberoasting, Golden Ticket, and DCSync are built on security event correlation.

What to consider:

• ADAudit Plus audits activity, so it won't surface standing misconfigurations like risky delegations or weak trusts that a posture scanner catches.
• Its attack detection depends on Windows event-log correlation, so coverage hinges on audit policy configuration and log completeness.

Best for: Organizations that want AD activity auditing and compliance reports without a posture-assessment test catalog.

4. BloodHound Community Edition

BloodHound Community Edition, from SpecterOps, is an open-source attack-path tool that maps Active Directory relationships into a graph to reveal escalation paths from low-privileged accounts to domain dominance.

Key features:

• Graph-based collection of AD and Entra ID objects and relationships via the SharpHound and AzureHound collectors, stored in a Neo4j database.
• Multi-hop attack paths to Domain Admins, DCSync holders, and other Tier 0 targets that control the entire directory.
• Hybrid attack-path edges (SyncedToADUser and SyncedToEntraUser) that link equivalent identities across on-premises AD and Entra ID when both collectors run.
• OpenGraph extensibility, Privilege Zones, and a formal Query Library were added in BloodHound v8.0 (July 2025).

What to consider:

• BloodHound maps attack paths, not configuration health, so it complements rather than replaces an assessment scanner.
• Reading the output takes familiarity with graph queries and attacker techniques, so it's less approachable than a scored report.

Best for: Red and blue teams prioritizing Purple Knight findings by real exploitability and attack-path reachability.

5. Tenable Identity Exposure

Tenable Identity Exposure (formerly Tenable.ad, built on technology Tenable acquired from Alsid in April 2021) is a continuous identity security posture management (ISPM) and identity threat detection and response (ITDR) platform for AD and Entra ID.

Key features:

• Continuous monitoring that pairs standing posture weaknesses with active attack detection, including DCSync, DCShadow, Kerberoasting, and Golden Ticket.
• Identity 360 unified risk view of accounts, entitlements, weaknesses, and relationships across AD and Entra ID.
• SIEM, SOC, and SOAR forwarding through syslog and a REST API for security operations integration.
• SaaS and on-premises deployment options for hybrid and air-gapped environments.

What to consider:

• Coverage centers on AD and Entra ID, so non-Microsoft identity providers fall outside its core detection depth.
• Identity-only deployments give up the cross-surface correlation that the broader Tenable One platform provides.

Best for: Enterprise SOC teams that need AD and Entra attack detection alongside posture management with SIEM integration.

6. Microsoft Defender for Identity

Microsoft Defender for Identity is a sensor-based ITDR platform that monitors domain controller traffic for identity attack patterns and integrates with Microsoft Defender XDR, effectively a bundled identity layer for organizations with Microsoft E5 licensing.

Key features:

• Domain controller sensors that inspect Kerberos, NTLM, and LDAP traffic in real time.
• Detection of lateral movement, credential theft, AD reconnaissance, and privilege escalation mapped to the MITRE ATT&CK framework.
• Identity security posture assessments across AD and Entra ID surfaced inside Defender XDR.
• Inclusion with Microsoft 365 E5, EMS E5, and Microsoft 365 E5 Security for eligible customers.

What to consider:

• Detection depth is strong inside the Microsoft ecosystem but thinner for non-Microsoft IdPs, with Okta posture assessments as the main extension.
• The version 3.x sensor requires Microsoft Defender for Endpoint to be installed on the same server, which adds domain controller deployment and maintenance work.

Best for: Organizations with Microsoft E5 licensing that want always-on identity attack detection inside Defender XDR.

7. Semperis DSP and Lightning Intelligence

Semperis Directory Services Protector (DSP) and Lightning Intelligence are Semperis's paid platforms for continuous monitoring of AD and Entra ID, automated rollbacks, and posture assessment. Semperis positions itself as the upgrade path for Purple Knight users who need more than periodic scans.

Key features:

• Continuous AD and Entra ID change monitoring with automated rollback of malicious changes and object restoration.
• SIEM and SOAR forwarding that routes directory threat detections into security operations workflows.
• Lightning Intelligence SaaS posture scoring across multi-forest AD and multi-tenant Entra ID with weekly trend tracking.
• Forest Druid, a separate free tool for Tier 0 attack-path discovery.

What to consider:

• DSP focuses on AD and Entra ID detection and recovery, so access governance and compliance reporting fall outside its scope.
• It centers on detecting and rolling back changes rather than blocking them, so it isn't a real-time prevention layer.

Best for: Purple Knight users who want to stay with Semperis and add continuous monitoring, rollback, and SIEM integration.

Choosing the right Purple Knight alternative for your organization

The choice hinges on the gap you're actually trying to close. If you need continuous monitoring and threat detection, look for a platform that maintains a live baseline rather than relying on periodic scans.

If SIEM integration or automated remediation is the priority, let a demonstrable operational need drive the move to a commercial platform rather than a feature checklist. If you just want a different free AD risk score, the most direct option is a peer assessment tool with headless automation.

For teams that have run an assessment and now need to show those exposures were fixed and stayed fixed, Netwrix adds what a point-in-time scan can't. Netwrix PingCastle delivers the free AD assessment, and Netwrix Auditor audits every Active Directory and Entra ID change, alerts on the risky ones, and keeps the time-stamped history that proves a control held.

Request a demo to see how Netwrix maps assessment findings to continuous change tracking, alerting, and compliance reporting across your hybrid AD and Entra ID environment.

Disclaimer: The information in this article was verified as of June 2026. Please verify current capabilities directly with each provider.