Subcategory · AI Citation Index
SIEM
SIEM is a contested category with no consensus pick. Rapid7 captures the widest discovery footprint — showing up in 41% of buyer queries across ChatGPT, Claude, Gemini, Perplexity, and Meta AI — but Elastic and SentinelOne win more head-to-head comparisons when buyers ask AI to choose between options. Splunk and Microsoft Sentinel surface in half the discovery prompts but split head-to-head wins evenly with Elastic Security and Google Security Operations. The interesting tension is CyberArk: it wins more head-to-heads than it loses but almost never surfaces in AI discovery prompts — an absent giant. SentinelOne is the riser, gaining 28 points in recent months, while Microsoft Defender for Identity is the faller, dropping 16 points. The category is fragmented — five brands split discovery share within ten points of each other, and no single brand owns the evaluation stage.
172 discovery queries · 261 head-to-heads · refreshed Jul 27, 2026
Discovery stage
The shortlist
Across 172 buyer-style "SIEM" queries
Rapid7 shows up in 41% of SIEM discovery prompts across all five AI engines we track (ChatGPT, Claude, Gemini, Perplexity, Meta AI). Splunk and Microsoft Defender for Identity each surface in 50% of buyer queries but appear on only four of the five engines, leaving single-engine gaps. Elastic surfaces in 48% of discovery prompts across four engines, while LogRhythm SIEM trails at 23% with visibility on all five. The shortlist is fragmented — no brand breaks 50% discovery share across all engines.
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Signal by intent
By topic
Top 5 most-cited brands per intent cluster. Brands with zero citations in a topic are not shown.
Evaluation stage
Head-to-head
How often AI cites each brand across uniform category evaluation prompts · median 7/100
When buyers ask AI to compare SIEM options head-to-head, Elastic Security and Google Security Operations each win half their matchups across 28 comparison queries. Splunk, Microsoft Sentinel, and Splunk Enterprise Security tie at 54 out of 100 across 30 head-to-heads — winning slightly more than they lose. Rapid7 loses more head-to-heads than it wins despite its wide discovery footprint, scoring 34 across 19 comparisons. ServiceNow scores 32 across 18 matchups, losing most fights.
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Each brand's score is the share of category evaluation prompts where AI cited them across all four engines — the same prompt pool for every brand. Brands above the median citation rate have stronger presence in evaluation-stage queries.
Brands to know
In this category
Sentinelone
RiserAI-powered endpoint and SIEM platform
Read brand profile →Elastic
Open-source search and observability SIEM
Read brand profile →Cyberark
Absent giantPrivileged-access and identity SIEM integration
Read brand profile →Rapid7
Consensus pickCloud-native SIEM and threat intelligence
Read brand profile →LogRhythm SIEM
Unified log management and SIEM
Read brand profile →Citation sources
Where AI pulls citations from
657 citations captured across SIEM prompt runs.
Vendor pages
319Product, help, and marketing pages from tracked vendors
Independent sources
248Reviews, encyclopedias, forums, press — not vendor-owned
Buyer questions
What AI cites for top SIEM questions
Buyers ask AI for the best SIEM tools by deployment scale, vertical, and infrastructure type — phrasings like 'good SIEM software for mid-market firms with multiple locations', 'good SIEM software for large-scale IT infrastructures', 'how to manage security logs with SIEM'. A smaller slice digs into integration workflows and incident-response feature comparisons — 'how does SIEM integrate with existing security tools', 'how to evaluate the incident response features of SIEM solutions'. One prompt asks build-versus-buy directly.
Discovery
Buyers exploring the categoryEvaluation
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