ArcSight

What it does

ArcSight (now part of OpenText CyberRes) is one of the original enterprise SIEM (Security Information and Event Management) platforms - collecting and correlating security logs and events from across an organization's IT environment to detect threats, investigate incidents, and support compliance reporting. AI capabilities include AI-powered behavioral analytics that establish baselines of normal user and system activity and flag anomalous deviations (UEBA), machine learning correlation rules that identify threat patterns across high-volume event streams, and automated triage that prioritizes the highest-risk alerts for analyst attention. ArcSight is deployed in large government agencies, financial institutions, and global enterprises with complex, high-volume log environments requiring enterprise-grade compliance reporting.

Strengths

• Large government agencies, banks, and global enterprises use ArcSight for enterprise SIEM - AI behavioral analytics detecting insider threats and compromised accounts in high-volume event environments where manual analysis is impossible.
• ArcSight (now part of OpenText CyberRes) is one of the original enterprise SIEM (Security Information and Event Management) platforms - collecting and correlating security logs and events from across an organization's IT environment to detect threats, investigate incidents, and support compliance reporting.
• AI capabilities include AI-powered behavioral analytics that establish baselines of normal user and system activity and flag anomalous deviations (UEBA), machine learning correlation rules that identify threat patterns across high-volume event streams, and automated triage that prioritizes the highest-risk alerts for analyst attention.

Watch-outs

• Splunk and Microsoft Sentinel have greater market momentum: ArcSight has lost market share to Splunk and Microsoft Sentinel over the past decade — the ecosystem of integrations, community content, and skilled practitioners is smaller than the current market leaders.
• Complex deployment and tuning: ArcSight is one of the most complex SIEMs to deploy and tune — organizations typically require specialized ArcSight expertise and ongoing investment in correlation rule development to maintain effective threat detection.
• On-premise architecture can limit cloud agility: ArcSight's roots are in on-premise deployment — while cloud versions exist, organizations with cloud-first security architectures often find native cloud SIEMs like Microsoft Sentinel or cloud-delivered Splunk more operationally natural.

Pricing

ArcSight enterprise pricing not published. Licensed on EPS (events per second) capacity and deployment model. Large enterprise deployments run millions annually. OpenText CyberRes contracts negotiated.