Hey {{First Name | there}}. CrowdStrike, Microsoft, SentinelOne and Palo Alto Networks held every EDR shortlist that answered, twice in five weeks. The order moved. The roster did not. For everyone else, ranking work is the wrong spend and displacement is the right one. Below: a utility API with no authentication, and three buying windows.
🎯 Buying Windows
This week's windows: 3 incidents.
CenterPoint Energy (breach, Sep 16). Confirmed 7.49 million customer records were taken through an external API with no authentication token and no rate limiting. First buys: API discovery, authentication, rate limiting. source
Brevo (breach, Sep 18). A stolen Cloudflare API key let attackers inject malware into the marketing scripts of more than 100,000 customer websites. First buys: third-party script control, tag inventory. source
An incident cluster (Sep 17). Two oil tankers lost engine room, navigation and cargo controls to attackers, and federal teams boarded them on arrival. First buys: OT monitoring, network segmentation. source
Three incidents this week. The one leadership change we verified predates our seven-day window.
→ Lead Radar scores every window for your ICP and attaches verified contacts. See yours in GTMfusion.
🤖 The AI Shortlist Index — EDR week
Four engines, one buyer question. Who makes each top 5, measured this week:
# | Vendor | On engines |
|---|---|---|
1 | CrowdStrike (Falcon) | 3/4 |
2 | Microsoft (Defender for Endpoint) | 3/4 |
3 | SentinelOne (Singularity) | 3/4 |
4 | Palo Alto Networks (Cortex XDR) | 3/4 |
5 | Trend Micro (Vision One) | 2/4 |
6 | Sophos | 1/4 |
ChatGPT returned no ranked EDR list, so 3 of 4 is this week's ceiling. The other three engines named the same four brands they named on August 18. No ghost surfaced. Method: one prompt per engine, temperature 0, measured Sep 21.
The rotation: EDR (this issue) → SIEM Sep 29 → IAM Oct 6 → AppSec Oct 13 → Email security Oct 20 → CSPM Oct 27.
🧭 Vendor Moves
MIND raised a well-earned $72 million Series B to block data leaving through generative AI, email and SaaS. Your move: every DLP deal now carries an AI-exfiltration question; write your answer this week. source
Cohesity shipped backup and recovery for AI agents and the data they touch. Your move: resilience buyers will ask who restores an agent; have the answer on the slide. source
Arcjet put runtime controls and audit trails around agents developers are already shipping. Your move: developer-led agent security is now a category; price and package for it. source
Also: Rubrik (opens its security data to agents through MCP) · Check Point (patched product flaws alongside Kaspersky and Tanium).
Launching something that changes selling conditions? Reply with the announcement. If it clears our bar it runs here, with the source link.
📈 The Number: Zero. New names in any engine's EDR top four since August 18. Five weeks, three answering engines, the same four brands. Source: Cyber GTM Signals, measured Sep 21, 2026. |
📅 On the calendar
When | Event | Where |
|---|---|---|
Oct 27-29 | it-sa Expo&Congress | Nuremberg |
Nov 4-5 | 4th European Cybersecurity Skills Conference | Larnaca |
Nov 30-Dec 4 | AWS re:Invent | Las Vegas |
Booking a booth or briefings? The windows above tell you who to get meetings with.
🔗 Worth your time
One unsupervised AI agent ran up a $50,000 cloud bill. Agent governance is now a budget line. Help Net Security
98% of fraudulent hires already hold company credentials when caught. Identity proofing starts at onboarding. Help Net Security
The Play
Measure your category on all four engines, then measure it again in four weeks. If the roster does not move, ranking work is the wrong spend and displacement content is the right one. Stop optimizing order inside a frozen list.
Our call: By December 31, 2026, at least one engine's EDR top four includes a brand outside CrowdStrike, Microsoft, SentinelOne and Palo Alto Networks.
See you next Tuesday. Forward this to the CMO who still thinks AI search is SEO.
— Martin
Measured, not opined. One prompt per engine, temperature 0. Want your brand's AI-visibility report? Reply with your domain. One report, no pitch. |
The personalized version, with names, scores, and your own AI-answer share, is what GTMfusion sends its users every Monday. Start your 14-day trial →
Forwarded this? Subscribe here. This newsletter grows by referral, not by ads.
Cyber GTM Signals · a GTMfusion publication