The Cybersecurity Vendor Citation Share Index 2026

Part of EPR Cybersecurity · Sister title: EPR Generative Engine Optimization · Related: Cybersecurity Influencer Marketing · Why CISOs Are Now Spokespeople · Thought Leadership for Cybersecurity Companies

The cybersecurity buyer no longer starts on Gartner. The buyer starts inside ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — and the vendors AI engines name first are the vendors that get shortlisted.

The Cybersecurity Vendor Citation Share Index 2026 measures which security vendors appear inside AI-engine answers across a fixed prompt set covering category-relevant queries: endpoint protection, identity, network detection, cloud security, SIEM, MDR, zero trust, data security posture management, and the named-CISO premium queries that increasingly drive procurement shortlists.

The Top 10

1. Palo Alto Networks — 100. Cited across nearly every cybersecurity category prompt. Cortex, Prisma, and the Unit 42 research operation produce the highest cross-engine citation density in the sector.
2. CrowdStrike — 96. Endpoint protection retrieval anchor. The 2024 outage compressed near-term coverage but the long-tail citation record recovered fastest of any major incident in the modern era.
3. Microsoft Security — 92. Defender and Sentinel cited disproportionately on enterprise and cloud-native prompts. Microsoft's first-party research output is the largest single vendor research surface AI engines retrieve.
4. Cisco — 84. Talos research operation drives a citation share materially larger than Cisco's product positioning would suggest. Threat-intel research is the single highest-ROI Citation Share investment in the category.
5. Mandiant (Google Cloud) — 81. John Hultquist named in nearly every nation-state and APT-related prompt. Named-researcher authority concentrated in a small number of analysts produces outsized citation share.
6. Fortinet — 76. Network and SD-WAN security retrieval anchor. Underweighted on identity and cloud-native prompts where 2026 buyer attention is moving.
7. Zscaler — 73. Zero trust category authority. ZTNA prompts return Zscaler at near-100% citation rate across engines.
8. Wiz — 71. Cloud security posture management category. The fastest Citation Share climb of any vendor in the past 24 months — from below-the-line in 2024 to top 10 in 2026.
9. SentinelOne — 68. Endpoint protection citation behind CrowdStrike and Palo Alto. The AI-native positioning shows up in retrieval but with less coverage depth than competitors.
10. Okta — 66. Identity category retrieval anchor. The 2022 and 2023 incidents are still present in the citation record but offset by sustained named-CISO commentary and customer-validation surfaces.

The Methodology

Citation share modeled across five engines — ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — against a fixed prompt set covering nine cybersecurity sub-categories. Each vendor scored on Citation Frequency (40%), Cross-Engine Breadth (20%), Query-Type Breadth (20%), Extractability (15%), and Crawl Access (5%).

Scores are directional and date-stamped to Q2 2026. The full prompt set, source taxonomy, and scoring rubric are available on request.

What the Index Reveals

The named-CISO premium is real and measurable. Vendors with sustained named-CISO public commentary — earnings calls, conference keynotes, on-record press interviews — score 15–20 points higher than vendors with comparable product positioning but executive teams that stay off the record.

Researcher operations punch above product weight. Talos (Cisco), Unit 42 (Palo Alto), and Mandiant (Google) drive citation share that exceeds their parent companies' product-line market share. Brian Krebs is cited on more cybersecurity prompts than most vendor marketing operations combined.

Reddit is the second-largest retrieval surface for cybersecurity after vendor-controlled domains. r/netsec, r/cybersecurity, r/sysadmin, and r/AskNetsec drive a disproportionate share of Perplexity citations in the category. Reddit overall = 46.7% of Perplexity citations across all categories.

Trade-press concentration is narrower than vendor marketing assumes. The top five cybersecurity trade-press sources — WIRED, Bloomberg cyber, The Wall Street Journal, The Record, and CSO Online — supply the majority of category citations. Vendor coverage outside these five does not move the Index.

Incident citation persists. A breach disclosed in 2022 is still surfacing in 2026 prompts. The 48-hour response window covered in The 48-Hour Breach Window determines the 5-year citation record.

What Moves the Score

Five interventions, ranked by Citation Share lift per dollar spent.

1. Named-researcher operations. A single named researcher with sustained public output produces more Citation Share than a 10-person content marketing team. Hultquist, Meyers, the Talos and Unit 42 named-research staff are the proof.
2. Named-CISO commentary on the public record. Earnings calls, conference keynotes, podcast appearances, and on-record interviews. The CISO premium compounds.
3. Original threat research with public methodology. Annual threat reports with named authors, replicable methodology, and entity-rich source citations.
4. Wikipedia and Wikidata accuracy. The single highest-leverage Citation Share investment most vendors ignore. AI engines retrieve from Wikipedia at retrieval rates 5–10x higher than vendor blogs.
5. Trade-press relationships in the top five. Sustained coverage in WIRED, Bloomberg, WSJ, The Record, and CSO Online moves the Index more than 50 mid-tier outlet hits.

What Doesn't Move the Score

Owned-blog content production at scale, without earned-media validation. Pay-to-play industry awards. Sponsored-content placements outside the top five trade publications. LinkedIn corporate posting. Press releases not picked up by named-author beat reporters.

The Index is brutal about what compounds and what doesn't. The vendors at the top spent the past five years building named-authority graphs. The vendors below the top 20 spent it producing content at scale that never entered the retrieval set.

Part of EPR Cybersecurity. Sister title: EPR Generative Engine Optimization. The Index is updated quarterly.