The six insider threat detection tools compared here are SenseOn, Microsoft Purview Insider Risk Management, Proofpoint ITM, Varonis, Securonix UEBA and CyberArk. The deciding criterion is the telemetry you need: SenseOn unifies endpoint, network and identity data; Purview covers Microsoft 365 activity; Proofpoint records sessions; Varonis watches data access; Securonix analyses logs; CyberArk controls privileged accounts.
The Growing Challenge of Insider Threats
Insider threats remain one of the most difficult security challenges organisations face. Unlike external adversaries who must first breach the perimeter, insiders already have legitimate access to systems, data, and networks. Whether the threat stems from a disgruntled employee, a negligent contractor, or a compromised account being used by an external attacker, the result is the same: traditional perimeter-focused defences are insufficient, and a survey of the research literature reaches the same conclusion: insider threats are not well addressed by commonly employed security solutions (Homoliak et al., ACM Computing Surveys, 2019).
CISA defines insider threat as "the potential for an insider to use their authorized access or understanding of an organization to harm that organization". That harm is rarely only financial. It extends to intellectual property theft, regulatory penalties, reputational damage and operational disruption, and because the activity looks like normal work it is often found late.
This guide compares six categories of tools, and specific products, that security teams should evaluate when building an insider threat detection programme.
How We Evaluated These Tools
We assessed insider threat detection tools across five key criteria:
- Behavioural analytics depth: How effectively the tool builds user and entity baselines and detects deviations that indicate malicious or negligent activity.
- Data visibility: The breadth of telemetry sources the tool can ingest: endpoint, network, cloud, email, identity, and more.
- Alert fidelity: The ratio of true positives to false positives, which directly impacts analyst productivity and trust in the platform. Interviews with SOC analysts found that validating high volumes of false alarms causes burnout and desensitisation (Alahmadi et al., USENIX Security, 2022).
- Investigation workflow: How well the tool supports analysts during triage and investigation with contextual enrichment, timeline views, and forensic data.
- Deployment and operational overhead: The effort required to deploy, tune, and maintain the tool in a production environment.
The table below summarises where each product sits against those criteria. The sections that follow give the detail.
| Tool | Primary telemetry | Strongest at | Main limitation |
|---|---|---|---|
| SenseOn | Endpoint, network and identity from one agent | Cross-domain behavioural correlation | Best value when it replaces separate EDR, NDR and UEBA tools |
| Microsoft Purview Insider Risk Management | Microsoft 365 and Microsoft Graph logs, Defender for Endpoint alerts | Microsoft 365 activity, departing-user scenarios | Weak outside the Microsoft ecosystem; no raw network view |
| Proofpoint ITM | Endpoint, browser, cloud and email activity with screenshots | Forensic evidence for investigations | Storage volume and employee privacy approvals |
| Varonis | File, cloud and database access | Sensitive data discovery and permissions | Little endpoint process or network visibility |
| Securonix UEBA | Ingested logs from cloud and on-premises sources | Risk scoring across many log sources | Tuning effort; blind where logs are missing |
| CyberArk (Palo Alto Networks Idira) | Privileged sessions and credentials | Controlling and recording privileged access | Covers privileged users only |
1. SenseOn: Unified Detection with Behavioural Analytics
Overview
SenseOn takes an entirely different approach to insider threat detection by unifying endpoint, network, and identity telemetry into a single platform powered by its cross-domain correlation methodology. Rather than relying on a single analytical model, SenseOn cross-validates every alert using supervised learning, unsupervised anomaly detection, and deep-learning sequence analysis.
Key Strengths for Insider Threat Detection
- Unified telemetry: SenseOn's lightweight agent collects endpoint process data, network flow metadata, and user authentication events from a single sensor. This eliminates the blind spots that arise when organisations rely on separate EDR, NDR, and UEBA tools that must be manually correlated.
- Behavioural baselining: The platform automatically builds behavioural profiles for every user and device, covering login patterns, data access habits, application usage, and network communication. Deviations are scored against multiple models before an alert is raised, dramatically reducing false positives.
- Data movement tracking: SenseOn monitors file operations, USB transfers, cloud upload activity, and email attachments to detect data exfiltration attempts, whether deliberate or accidental.
- Low operational overhead: Because all detection logic runs on a single platform, security teams avoid the integration tax of stitching together multiple point solutions.
Ideal For
Organisations that want a single platform covering endpoint, network, and user behaviour analytics without the complexity of managing multiple tools.
2. Microsoft Purview Insider Risk Management
Overview
Microsoft Purview Insider Risk Management is a cloud-native solution tightly integrated with the Microsoft 365 ecosystem. According to Microsoft's documentation, it uses logs from Microsoft 365 and Microsoft Graph, plus Microsoft Defender for Endpoint alerts, to score risk indicators and raise alerts.
Key Strengths
- Deep Microsoft 365 integration: If your organisation runs on Microsoft 365, Purview provides unmatched visibility into email, SharePoint, OneDrive, and Teams activity without additional agents or connectors.
- Policy templates: Pre-built templates for data theft by departing users, data leaks and security policy violations accelerate time to value. The departing-user template needs the Microsoft 365 HR connector so that resignation dates feed the policy.
- Privacy controls: Microsoft states that "users are pseudonymized by default", with role-based access controls and audit logs, which helps balance monitoring with employee privacy requirements.
Limitations
- Ecosystem dependency: Visibility is strongest within the Microsoft ecosystem; organisations using significant non-Microsoft infrastructure will have gaps.
- Limited network visibility: Purview focuses on application-layer activity rather than raw network telemetry, which can miss lower-level exfiltration techniques.
Ideal For
Organisations heavily invested in the Microsoft 365 ecosystem seeking a tightly integrated insider risk solution.
3. Proofpoint Insider Threat Management (formerly ObserveIT)
Overview
Proofpoint ITM combines user activity monitoring with visual evidence to support investigations. The product page describes capturing "screenshots and activity context to validate careless or malicious behavior" across endpoints, browsers, cloud and email.
Key Strengths
- Visual evidence: Screenshots tied to the activity that triggered them give investigators evidence that stands up in HR and legal proceedings.
- Coverage across channels: The same activity record spans endpoints, browsers, cloud applications and email, so a file that leaves by any of those routes is visible.
- Pre-built detection rules: Proofpoint ships "out-of-the-box alert libraries, prebuilt insider threat scenarios, and customizable detection rules" covering data exfiltration, privilege misuse and policy violations.
Limitations
- Storage requirements: Screenshot capture generates significant data volumes, which can drive up storage costs and complicate retention management.
- Privacy concerns: Screen capture raises employee privacy concerns in some jurisdictions and may require works-council or legal approval.
Ideal For
Organisations that require detailed forensic evidence and session replay capabilities, particularly in regulated industries.
4. Varonis Data Security Platform
Overview
Varonis focuses on data-centric insider threat detection by monitoring who accesses what data, when, and how. Its Data Security Platform is positioned to "discover, classify, and label sensitive data", "remove excessive permissions" and "alert on abnormal behavior" across file servers, cloud storage and databases.
Key Strengths
- Data classification: Automated discovery and classification of sensitive data, including PII, financial records, and intellectual property, provides the foundation for meaningful access-anomaly detection.
- Permission analysis: Varonis maps the often-tangled web of file and folder permissions, highlighting excessive access rights that increase insider threat risk.
- Data lifecycle enforcement: The platform can apply lifecycle policies to data that is no longer actively used but still accessible, which reduces the attack surface and storage cost.
Limitations
- Data-centric focus: While Varonis excels at monitoring data access, it provides less visibility into endpoint processes, network traffic, and identity-layer events.
- Deployment complexity: Initial deployment, particularly permission mapping and data classification, can be resource-intensive for large environments.
Ideal For
Organisations whose primary insider threat concern is unauthorised access to sensitive data stores, particularly unstructured data on file servers and cloud platforms.
5. Securonix UEBA
Overview
Securonix offers a dedicated user and entity behaviour analytics (UEBA) platform that ingests log data from a wide range of sources and applies machine-learning models to detect anomalous behaviour. Its UEBA product page describes threat models "that map to both the MITRE ATT&CK and US-CERT frameworks", dynamic risk scoring and built-in APIs for major cloud platforms.
Key Strengths
- Broad data ingestion: Securonix ingests logs from cloud applications, on-premises infrastructure and existing SIEM tools through built-in APIs.
- Threat chains: The platform links related anomalous events into chains mapped to MITRE ATT&CK, which helps analysts see the full scope of a low-and-slow attack rather than one event at a time.
- Risk scoring: Continuous risk scoring for users and entities enables security teams to prioritise investigation efforts on the highest-risk individuals.
Limitations
- Tuning effort: Like most UEBA platforms, Securonix requires significant tuning during initial deployment to reduce false positives and align models with organisational norms.
- Log dependency: Detection quality is directly proportional to log quality. If critical data sources are not onboarded, blind spots will exist.
Ideal For
Large enterprises with mature security operations teams that can invest in tuning and managing a dedicated UEBA platform.
6. CyberArk Privileged Access Management (now Palo Alto Networks Idira)
Overview
CyberArk approaches insider threat from the privileged-access angle. By vaulting, rotating and monitoring privileged credentials, it reduces the attack surface that insiders, and external attackers using compromised insider credentials, can exploit. CyberArk's product pages now redirect to Palo Alto Networks, whose Idira platform is described as "built on CyberArk's legacy and powered by Palo Alto Networks"; existing customers keep the same product under a new name.
Key Strengths
- Credential vaulting: The PAM product page describes "automated credential vaulting and rotation" for critical system-level accounts, so credentials are issued on demand rather than held by people.
- Session isolation and recording: The platform can "isolate and record every sensitive session across infrastructure and SaaS", which gives an audit trail for every privileged action.
- Least-privilege enforcement: Standing administrative rights are replaced with policy-based elevation, where "ephemeral privileges are created for the duration of a task".
Limitations
- Narrow focus: CyberArk is purpose-built for privileged-access management and does not provide broad insider threat detection across non-privileged users.
- Operational overhead: Managing the vault, access workflows and rotation policies requires dedicated administrative effort, and the rebrand adds a migration question for existing customers.
Ideal For
Organisations seeking to control and monitor privileged-account access as a foundational element of their insider threat programme.
Choosing the Right Approach
No single tool addresses every dimension of insider threat detection. The most effective programmes combine multiple capabilities:
- Behavioural analytics to detect deviations from normal user activity
- Data loss prevention to monitor and control sensitive data movement
- Privileged access management to secure high-risk accounts
- Network detection to identify lateral movement and data exfiltration at the network layer
- Endpoint visibility to capture process-level activity and forensic evidence
Platforms like SenseOn that unify multiple telemetry sources and detection methodologies into a single solution offer a compelling advantage: they reduce the integration burden, eliminate visibility gaps between point solutions, and deliver higher-fidelity alerts by cross-validating signals across data sources.
Whatever toolset you choose, the most important step is to start. Insider threats are a reality for every organisation, and the longer one runs unnoticed the more it costs to unwind.
The newest insider is not a person. Copilots and AI agents hold credentials, read data and take actions under a user's identity, and the same behavioural record has to cover them. The CISO's AI Accountability Playbook sets out eleven checks for whether you could prove, stop and undo what one AI workflow did.
Frequently Asked Questions
What is the best insider threat detection tool?
It depends on the telemetry you need. SenseOn covers endpoint, network and identity behaviour in one platform. Microsoft Purview is strongest inside Microsoft 365. Proofpoint ITM records sessions for forensic evidence. Varonis watches access to sensitive data. Securonix applies UEBA to logs. CyberArk controls privileged accounts. Most programmes combine two or three.
What is the difference between UEBA, DLP and PAM for insider threats?
UEBA builds a baseline of normal user and entity behaviour and flags deviations. DLP monitors and blocks movement of sensitive data. PAM vaults, brokers and records privileged access. UEBA finds the unusual, DLP stops the exfiltration, PAM limits what a compromised or malicious administrator can reach.
Can insider threat tools detect a compromised account?
Yes, if they baseline behaviour rather than match signatures. A stolen credential used from a new location, at a new hour, to reach data the user never touched, looks different from that user's normal pattern. Tools that correlate endpoint, network and identity signals catch this earlier than tools that watch one layer.
Sources
- CISA, Insider Threat Mitigation, accessed 20 September 2026
- Microsoft, Learn about Insider Risk Management, updated 26 June 2026, accessed 20 September 2026
- Proofpoint, Insider Threat Management, accessed 20 September 2026
- Varonis, Data Security Platform, accessed 20 September 2026
- Securonix, UEBA, accessed 20 September 2026
- Palo Alto Networks, Privileged Access Management, accessed 20 September 2026
- Palo Alto Networks, Idira, accessed 20 September 2026
- Ivan Homoliak, Flavio Toffalini, Juan Guarnizo, Yuval Elovici, Martín Ochoa, "Insight Into Insiders and IT: A Survey of Insider Threat Taxonomies, Analysis, Modeling, and Countermeasures", ACM Computing Surveys, 2019, https://doi.org/10.1145/3303771 (open access: https://arxiv.org/pdf/1805.01612)
- Bushra A. Alahmadi, Louise Axon, Ivan Martinovic, "99% False Positives: A Qualitative Study of SOC Analysts' Perspectives on Security Alarms", USENIX Security Symposium, 2022, https://www.usenix.org/conference/usenixsecurity22/presentation/alahmadi (open access)
Related reading:
- 15 Insider Threat Indicators Every Security Team Should Monitor
- What Is UEBA? User and Entity Behaviour Analytics Explained
How SenseOn writes, checks and corrects its content: editorial standards.
