How AI Search Is Recommending Endpoint Detection and Response Software: Monthly Trends
This analysis is based on the source benchmark: Endpoint Detection and Response Software: 2026 AI Visibility Market Discovery Index
By Mark HuntleyFounder and CEOKey Takeaways
- CrowdStrike Falcon led October 2026 with 67.1% valid recommendation coverage, ahead of Microsoft Defender for Endpoint by 5.2 points.
- Bitdefender GravityZone was the strongest riser, gaining across coverage, top-three placement, and raw mention presence.
- Sophos Intercept X posted the largest decline versus the July baseline, with lower coverage and weaker mention presence.
- All 507 qualified October observations fell into brand recommendation intent; pricing, value, and head-to-head comparison intent were not captured.
Executive Summary
CrowdStrike Falcon remains the category leader in October 2026 with 67.1% valid recommendation coverage, a 5.2-point lead over second-place Microsoft Defender for Endpoint at 61.9%. The lead held even as most brands moved in the same direction: eight of ten tracked brands posted month-over-month coverage gains versus September 2026, while two brands (Cybereason and Sophos Intercept X) eased slightly, each down 0.5 points. The gap between the top cluster and the rest of the field remained wide. CrowdStrike Falcon's 8.2-point rise from 58.9% in September 2026 is its largest single-month move of the series and is flagged significant versus the prior month.
The strongest upward mover on the baseline-to-current measure is Bitdefender GravityZone, which rose 7.6 points from 28.3% in July 2026 to 35.9% in October 2026. That move is flagged significant against the baseline and, at 8.4 points versus September 2026, also significant against the prior month. Its top-three rate rose 5.4 points against the baseline, from 10.8% to 16.2%, and its rank-one rate edged from 7.0% to 9.1%.
The sharpest decliner since baseline is Sophos Intercept X, which fell 8.3 points from 43.2% in July 2026 to 34.9% in October 2026, a move flagged significant. It held nearly flat versus September 2026, down 0.5 points, so the series decline is anchored in earlier months rather than a fresh slide. Trend Micro also sits below its baseline, down 2.9 points to 12.4% in October 2026, and its raw mention presence fell 6.7 points to 18.1% across the same span.
The result sits against four months of benchmark history. The leader's coverage dipped through August and September before recovering in October 2026, while a small number of brands (Bitdefender GravityZone chief among them) moved above their baseline into significant territory, producing a mixed month rather than a broadly directional one.
Each monthly run begins with 800 prompt-surface observations (490 unique questions in July 2026 and 560 in October 2026) across the benchmark's defined AI/search surface universe. Of those, 800 mentioned a tracked brand or competitor in July 2026 and 799 in October 2026; 603 were relevant and 197 were irrelevant in July 2026, and 671 were relevant and 128 irrelevant in October 2026. The public metrics use the 456 qualified observations in July 2026 and the 507 qualified observations in October 2026 that survive both qualification stages.
AI recommendation trend
valid recommendation coverage, Jul 2026 to Oct 2026
- CrowdStrike Falcon67.1%
- Microsoft Defender for Endpoint61.9%
- SentinelOne60.4%
- Bitdefender GravityZone35.9%
- Sophos Intercept X34.9%
- Palo Alto Cortex XDR27.8%
- Trend Micro12.4%
- Trellix2.6%
- VMware Carbon Black2.4%
- Cybereason2.0%
Key Findings
Signal | October 2026 finding |
|---|---|
Category leader | CrowdStrike Falcon at 67.1% valid recommendation coverage, a 5.2-point lead over Microsoft Defender for Endpoint at 61.9% |
Largest single-month riser | Bitdefender GravityZone, up 8.4 points from 27.5% in September 2026 to 35.9% in October 2026, flagged significant |
Largest single-month decliner | Cybereason and Sophos Intercept X, tied at down 0.5 points versus September 2026 (Cybereason 2.5% to 2.0%; Sophos Intercept X 35.4% to 34.9%) |
Significant baseline movement | Bitdefender GravityZone up 7.6 points to 35.9% and Sophos Intercept X down 8.3 points to 34.9%, both versus July 2026 |
Leader's top-three rate | CrowdStrike Falcon at 61.3%, up 1.4 points from 59.9% in July 2026 |
Presence indicator | CrowdStrike Falcon's raw mention presence of 88.4% is up 3.5 points from 84.9% in July 2026 |
Benchmark Context
The report separates the raw collection universe from the qualified analysis set. Brand-level recommendation percentages are calculated within the qualified benchmark set.
Research stage | Jul 2026 | Oct 2026 | What it represents |
|---|---|---|---|
Source prompt-surface observations collected | 800 | 800 | Total prompt-surface observations gathered |
Unique questions | 490 | 560 | Distinct questions within the collection |
Brand / competitor mentions | 800 | 799 | Prompts mentioning a tracked brand or competitor |
Relevant prompts | 603 | 671 | Prompts deemed relevant to the category |
Irrelevant prompts | 197 | 128 | Prompts deemed irrelevant to the category |
Qualified benchmark observations | 456 | 507 | Public denominator for brand-level metrics |
Qualified surface breadth | 6 | 6 | AI surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, AI Mode |
The intermediate months contributed 536 qualified observations in August 2026 and 520 in September 2026 before the set settled at 507 in October 2026. The benchmark's defined AI/search surface universe held at all six canonical families in each month of the series.
Benchmark-Level Metrics
Metric | Jul 2026 | Oct 2026 | Change |
|---|---|---|---|
Qualified observations | 456 | 507 | Up 51 |
Companies tracked | 10 | 10 | No change |
Recommendation-shaped answer share | 46.5% | 57.4% | Up 10.9 points |
Valid recommendation shortlist share | 70.4% | 75.3% | Up 4.9 points |
Category leader by coverage | CrowdStrike Falcon | CrowdStrike Falcon | No change |
The recommendation-shaped answer share fell as low as 40.4% (210 of 520) in September 2026 before recovering to 57.4% (291 of 507) in October 2026. The valid recommendation shortlist share bottomed in August 2026 at 57.5% (308 of 536) and has now climbed back above its July 2026 level.
AI Recommendation Trend
Questions This Section Answers
- Which brands lead the EDR recommendation set in October 2026, and how wide is the leader's margin?
- Which brands cleared the significance threshold against the July 2026 baseline?
The leader is holding at a wider margin while a new significant riser moves up behind the top cluster
CrowdStrike Falcon leads on 67.1% valid recommendation coverage in October 2026, with Microsoft Defender for Endpoint second at 61.9% and SentinelOne third at 60.4%. The gap between the leader and second-place Microsoft Defender for Endpoint widened to 5.2 points in October 2026, up from 1.1 points in July 2026, while fourth-place Bitdefender GravityZone's gap to the top cluster narrowed to 31.2 points as its own coverage rose across the series.
Brand | Jul 2026 | Oct 2026 | Movement | Oct 2026 rank |
|---|---|---|---|---|
Bitdefender GravityZone | 28.3% | 35.9% | Up 7.6 points | 4th |
CrowdStrike Falcon | 62.5% | 67.1% | Up 4.6 points | 1st |
Cybereason | 1.1% | 2.0% | Up 0.9 points | 10th |
Microsoft Defender for Endpoint | 61.4% | 61.9% | Up 0.5 points | 2nd |
Palo Alto Cortex XDR | 29.2% | 27.8% | Down 1.4 points | 6th |
SentinelOne | 58.1% | 60.4% | Up 2.3 points | 3rd |
Sophos Intercept X | 43.2% | 34.9% | Down 8.3 points | 5th |
Trellix | 4.4% | 2.6% | Down 1.8 points | 8th |
Trend Micro | 15.3% | 12.4% | Down 2.9 points | 7th |
VMware Carbon Black | 1.5% | 2.4% | Up 0.9 points | 9th |
The category-level change since July 2026 came from the combination of several smaller movements rather than from any single brand sharply reordering the field. Two brands cleared the significance threshold against the baseline: Bitdefender GravityZone on the upside and Sophos Intercept X on the downside.
What Changed This Month
Questions This Section Answers
- Why is Bitdefender GravityZone flagged as the significant riser this month?
- What separates CrowdStrike Falcon's coverage gain from its easing rank-one rate?
- Where did Sophos Intercept X lose ground, and why did its top-three placement hold?
CrowdStrike Falcon
CrowdStrike Falcon's coverage moved from 62.5% in July 2026 to 67.1% in October 2026, up 4.6 points across the series. That baseline move is not flagged significant, but the 8.2-point rise from September 2026 to October 2026 is flagged significant against the prior month and is the largest single-month move of the series for the leader.
Its rank-one rate eased from 47.1% in July 2026 to 43.6% in October 2026, down 3.5 points, staying within normal variation. Its top-three rate rose 1.4 points across the series, from 59.9% to 61.3%.
CrowdStrike Falcon widened its lead on coverage while its rank-one rate eased slightly. That is a coverage story, not a placement story: the brand sits in more valid recommendation shortlists than it did in July 2026, but the share of prompts where it is placed first has drifted down. Presence and coverage remain distinct signals, and they are pointing in the same direction here while rank-one is not.
Highest-priority diagnostic: Which surfaces and prompt types drove the 8.2-point October gain, and which prompts are surfacing CrowdStrike Falcon in the recommendation set but not at rank one?
Bitdefender GravityZone
Bitdefender GravityZone is the category's significant riser, up 7.6 points from 28.3% in July 2026 to 35.9% in October 2026 on the primary metric. Against the prior month the move is sharper still, up 8.4 points from 27.5% in September 2026. The brand was recommended in 182 of 507 qualified observations in October 2026.
Its top-three rate rose from 10.8% in July 2026 to 16.2% in October 2026, up 5.4 points. Its rank-one rate moved from 7.0% to 9.1%, up 2.1 points. Raw mention presence rose 8.5 points across the series, from 32.5% to 41.0%.
Bitdefender GravityZone moved up on coverage, top-three placement, and presence at the same time. That combined move is why the primary-metric change is flagged significant rather than incidental. The brand rose past Palo Alto Cortex XDR and now sits fourth in coverage, behind the top cluster and ahead of the rest of the field.
Highest-priority diagnostic: Which prompts and surfaces produced the concentrated October gain, and is that set stable month over month or tied to specific question phrasings?
Sophos Intercept X
Sophos Intercept X is the category's significant decliner on the baseline-to-current measure. Coverage fell 8.3 points from 43.2% in July 2026 to 34.9% in October 2026. It held nearly flat from September 2026 to October 2026, down 0.5 points, so the significant series move predates the report month.
The brand was recommended in 177 of 507 qualified observations in October 2026. Its top-three rate rose slightly across the series, from 8.8% in July 2026 to 9.5% in October 2026, up 0.7 points. Raw mention presence fell 6.8 points across the same period, from 49.8% to 43.0%. Its rank-one rate slipped 0.9 points, from 1.1% to 0.2%.
Sophos Intercept X is being mentioned in fewer answers while holding its top-three placement rate. The decline is showing up in the presence layer and the coverage layer, not in top-three placement. A brand with fewer mentions will usually see fewer recommendations, and that pattern is visible here. Notable gaps also widened against it: its coverage gap versus CrowdStrike Falcon grew 12.9 points across the series and versus SentinelOne grew 10.6 points.
Highest-priority diagnostic: Which surfaces carried the presence decline, and did the top-three placement hold because the prompts where Sophos Intercept X remains present skew toward comparison-style questions?
Microsoft Defender for Endpoint and SentinelOne
Microsoft Defender for Endpoint moved from 61.4% in July 2026 to 61.9% in October 2026, up 0.5 points, and rose 5.4 points versus September 2026. Both moves stay within normal month-to-month variation. The brand was recommended in 314 of 507 qualified observations in October 2026. Its rank-one rate rose from 4.6% in July 2026 to 7.3% in October 2026, up 2.7 points, and its top-three rate eased 1.7 points across the same period.
SentinelOne moved from 58.1% in July 2026 to 60.4% in October 2026, up 2.3 points, and rose 5.0 points versus September 2026. The brand was recommended in 306 of 507 qualified observations in October 2026. Its top-three rate fell 3.8 points across the series, from 49.8% to 46.0%, while its rank-one rate held essentially flat at 4.5%.
Both brands are clustered within 1.5 points of each other in coverage, so neither has separated from the other. Both are visible in a similar share of prompts and both are recommended in roughly the same number of qualified observations. The distinction between them is in placement density: Microsoft Defender for Endpoint carries a higher rank-one rate, while SentinelOne carries a higher overall coverage rate.
Highest-priority diagnostic: Which prompts put Microsoft Defender for Endpoint in the first slot rather than SentinelOne, and vice versa, and does the pattern differ by surface?
Trend Micro, Trellix, Palo Alto Cortex XDR, Cybereason, and VMware Carbon Black
Trend Micro moved from 15.3% in July 2026 to 12.4% in October 2026, down 2.9 points, and rose 2.6 points versus September 2026. Its raw mention presence fell 6.7 points across the series to 18.1%. The brand was recommended in 63 of 507 qualified observations in October 2026. Its top-three rate eased from 3.3% to 2.2%, down 1.1 points, and its rank-one rate slipped from 0.7% to 0.2%.
Trellix moved from 4.4% in July 2026 to 2.6% in October 2026, down 1.8 points, and held essentially flat versus September 2026, up 0.1 points. The brand was recommended in 13 of 507 qualified observations in October 2026, and its net sentiment score moved from 0.6 in July 2026 to 0.3 in October 2026. For Trellix, a single-digit count means one or two observations can move percentages by a visible amount.
Palo Alto Cortex XDR moved from 29.2% in July 2026 to 27.8% in October 2026, down 1.4 points, and rose 0.9 points versus September 2026. Its top-three rate rose 4.8 points, from 8.8% to 13.6%, and its rank-one rate rose 2.9 points, from 2.4% to 5.3%. Palo Alto Cortex XDR is holding its coverage position while its placement quality visibly improved.
Cybereason moved from 1.1% in July 2026 to 2.0% in October 2026, up 0.9 points, and eased 0.5 points versus September 2026. The brand was recommended in 10 of 507 qualified observations in October 2026. VMware Carbon Black moved from 1.5% in July 2026 to 2.4% in October 2026, up 0.9 points, and extended a streak of three consecutive monthly gains that remains within normal variation cumulatively. It was recommended in 12 of 507 qualified observations in October 2026, and its net sentiment score rose from 0.2 in July 2026 to 0.4 in October 2026.
Highest-priority diagnostic: For the small-count brands, which specific prompts and surfaces are producing valid recommendations, and are those prompts repeatable or dependent on phrasing that appears in only a handful of observations?
Buyer-Intent Interpretation
Questions This Section Answers
- What buyer-intent clusters do the 507 qualified observations cover in October 2026?
- Can the benchmark answer how AI systems frame EDR pricing or head-to-head comparisons?
Buyer-intent cluster | What it captures | Strategic question |
|---|---|---|
Brand Recommendation | Prompts seeking a direct recommendation for a specific product or vendor | Which brand do AI systems recommend, and in what position? |
Pricing & Value | Prompts focused on cost, pricing models, or value comparisons | How do AI systems frame price and value trade-offs? |
Multi-Brand Comparison | Prompts asking for head-to-head or side-by-side comparisons | Which brands are compared, and who wins those comparisons? |
In October 2026, all 507 qualified observations fell into the Brand Recommendation cluster. None of the qualified observations captured pricing, value, or multi-brand comparison intent. The public benchmark cannot yet answer how AI systems frame price, value, or head-to-head comparisons between endpoint detection and response options. Those commercial questions remain open for company-level analysis.
Brand Opportunity Summary
Questions This Section Answers
- What is the highest-priority diagnostic for each tracked EDR brand this month?
- Which brands show the strongest signal versus those that need investigation?
Brand | Oct 2026 coverage | Current signal | Highest-priority diagnostic |
|---|---|---|---|
Bitdefender GravityZone | 35.9% | Significant riser across the series | Which prompts and surfaces produced the concentrated October gain? |
CrowdStrike Falcon | 67.1% | Leader; wide coverage margin with an easing rank-one rate | Which prompts surface it in the recommendation set but not at rank one? |
Cybereason | 2.0% | Small count, marginally up on the series and down versus the prior month | Which specific prompts are producing its 10 valid recommendations? |
Microsoft Defender for Endpoint | 61.9% | Stable at second; highest rank-one rate of the top three | Which query types produce rank-one versus lower placements? |
Palo Alto Cortex XDR | 27.8% | Flat coverage with gains in top-three and rank-one placement | Which prompts are producing the improved placement? |
SentinelOne | 60.4% | Third place; flat rank-one rate with a lower top-three rate across the series | Which competitors take top-three positions when SentinelOne does not? |
Sophos Intercept X | 34.9% | Significant series decliner; held flat versus the prior month | Which surfaces carried the presence decline? |
Trellix | 2.6% | Low and declining coverage on a small valid-recommendation count | Which niche prompts keep Trellix in consideration? |
Trend Micro | 12.4% | Series decline in coverage and a presence decline | Where is the brand losing presence and recommendation strength? |
VMware Carbon Black | 2.4% | Three consecutive monthly gains from a low base, cumulatively within normal variation | Which prompts are beginning to surface the brand? |
The benchmark identifies where attention is warranted; a company-level analysis is needed to explain why.
Evidence Behind the Benchmark
The aggregate metrics are built from prompt-level observations (query, surface, recommendation outcome, rank, sentiment, and citations where exposed). Company-level analysis can go deeper into prompt, competitor, surface, and evidence patterns. Source presence is not automatically treated as proof of causation.
About This Benchmark
This report is part of the CiteWorks Studio AI Visibility Industry Market research program.
- AI Visibility Industry Market Methodology
- AI Visibility Industry Market Metrics
- AI Visibility Industry Market Standards
Report-Specific Interpretation Notes
- Small-count movement: For brands with low coverage (Cybereason, Trellix, VMware Carbon Black), small absolute changes can produce large percentage shifts. In October 2026, Trellix's coverage rests on 13 valid recommendations of 507 qualified observations, and VMware Carbon Black's on 12.
- Qualified denominator vs raw collection: Brand-level percentages are calculated against the qualified benchmark set (507 observations in October 2026), not the raw 800 prompt-surface observations collected.
- Directional analysis: Month-over-month movement identifies changes worth investigating; it does not by itself establish the cause of those changes. The benchmark measures what AI systems surface, not why they surface it.
Next Step
The Public Benchmark Shows Where a Brand Is Winning or Losing. A Company-Level Audit Shows Why.
Beneath the aggregate percentages lie the questions that matter for strategy: which high-intent prompts are won, which competitor takes the recommendation when a brand loses, what attributes AI systems associate with each option, and which external sources shape those answers. The October 2026 benchmark shows, for example, that CrowdStrike Falcon's coverage widened while its rank-one rate eased, and that Bitdefender GravityZone moved up across coverage, placement, and presence simultaneously, but it does not say which prompts, surfaces, or sources are associated with either pattern.
A company-specific AI visibility audit maps those prompt, surface, competitor, ranking, sentiment, and evidence-source patterns into a prioritized visibility strategy. The public benchmark identifies where attention is warranted; the audit explains why and what to do about it.
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About The Author
Mark Huntley
Founder and CEO
Mark Huntley, J.D. is founder of CiteWorks Studio, a strategic advisory focused on visibility, authority, and recommendation presence in AI-shaped search environments. His work centers on embedding-level GEO, vector optimization, and cosine gap engineering — helping brands align their digital presence with the retrieval systems that increasingly shape discovery, interpretation, and choice.