Subcategory · AI Citation Index
SIEM
SIEM is AI's clearest duopoly. Splunk and Splunk Enterprise Security each surface in 67% of buyer queries across all five engines (ChatGPT, Claude, Gemini, Perplexity, and a fifth in rotation), while Microsoft Defender for Identity matches that shortlist rate with the highest raw mention volume in the category. When buyers ask AI to compare options head-to-head, Splunk and Microsoft Sentinel tie at 54 out of 100 — both win more matchups than they lose, but neither dominates. Elastic Security and Google Security Operations land at 50, trading wins depending on the prompt. SentinelOne is the riser, gaining 28 points in head-to-head scoring over the past quarter while Microsoft Defender for Identity falls 16 points. This is a contested category — no single brand owns AI attention, and the top tier trades citations one-for-one across engines.
172 discovery queries · 261 head-to-heads · refreshed Aug 16, 2026
Discovery stage
The shortlist
Across 172 buyer-style "SIEM" queries
Splunk and Microsoft Defender for Identity each show up in 67% of discovery queries about SIEM software, surfacing across every engine we track. Splunk Enterprise Security matches that rate with nearly identical mention volume. Elastic lands in 65% of queries but is absent on one engine, leaving single-engine fragility. Rapid7 trails at 41%, visible across all five engines but only half as likely to surface as the top tier. Wazuh, the open-source option, appears in 23% of queries — consistent across engines but a distant sixth in share of attention.
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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
Splunk and Microsoft Sentinel tie for head-to-head wins, each scoring 54 across 30 comparison queries — both win more matchups than they lose, but neither pulls ahead. Elastic Security and Google Security Operations land at 50, trading wins depending on the prompt pairing. Sumo Logic scores 39, losing more head-to-heads than it wins, while Rapid7 and ServiceNow trail at 34 and 32 — both surface in comparison queries but rarely come out as the picked answer.
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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.
Trends
Over the last 12 months
SentinelOne is gaining ground, up 28 points in head-to-head scoring over the past quarter — the sharpest riser in the category. Microsoft Defender for Identity is losing share, down 16 points in the same window despite holding the highest discovery mention volume.
Brands to know
In this category
Sentinelone
RiserAutonomous endpoint detection and response
Read brand profile →Elastic
Open-source search and observability platform
Read brand profile →Rapid7
Cloud-native threat detection and response
Read brand profile →Cyberark
Privileged access management for enterprise
Read brand profile →Darktrace
AI-driven autonomous cyber defense
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 SIEM tools by scale and deployment context — phrasings like 'good SIEM software for mid-market firms with multiple locations', 'SIEM for large-scale IT infrastructures'. A second slice digs into workflows and integrations: 'how to manage security logs with SIEM', 'how does SIEM integrate with existing security tools'. A smaller set of queries explores build-versus-buy tradeoffs and incident response features. The questions stay operational — naming team sizes, infrastructure constraints, and feature-level requirements.
Discovery
Buyers exploring the categoryEvaluation
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