# 5 zero trust vendors in AI answers Every vendor and figure on this page comes from the AEO Index, Q3 2026 edition. 5 zero trust vendors ranked by AI answer share, the share of 312 zero trust answers (13 prompts, 6 engines, 4 runs) that name each: median 38%, a spread of 61 percentage points from first to last, led by Rheval (71%) and Palisk (55%). Last reviewed October 2, 2026. Ranked by AI answer share: answers naming the vendor divided by the 312 answers to zero trust prompts (13 prompts x 6 engines x 4 runs). Equal counts share a rank. | Rank | Vendor | AI answer share | | --- | --- | --- | | 1 | Rheval | 71% (221 of 312 answers) | | 2 | Palisk | 55% (171 of 312 answers) | | 3 | Hextel | 38% (119 of 312 answers) | | 4 | Kryvel | 11% (35 of 312 answers) | | 5 | Trevast | 10% (31 of 312 answers) | Rows removed before ranking: 0 duplicate vendor records, 22 vendors from other categories named in these answers, and 0 zero trust vendors never named in them. ## FAQ ### Which zero trust vendors do AI engines name most often? [#zero-trust-top](https://www.theaeocompany.co/categories/zero-trust#zero-trust-top) Rheval (71%) and Palisk (55%) are the zero trust vendors AI engines name most often, by share of 312 zero trust answers naming each (5 vendors ranked, median 38%). Rheval's 71% is 33 percentage points above the median share of 38%, less than double it. Last reviewed October 2, 2026. Source: The AEO Index, Q3 2026 edition. ### How is the zero trust vendor ranking calculated? [#zero-trust-ranked-by](https://www.theaeocompany.co/categories/zero-trust#zero-trust-ranked-by) Zero trust vendors are ranked by AI answer share: the answers that name a vendor divided by the 312 answers to zero trust prompts (13 prompts x 6 engines x 4 runs). Each vendor counts at most once per answer, and vendors with equal counts share a rank. Source: The AEO Index, Q3 2026 edition. ### Which zero trust vendors are included, and which are left out? [#zero-trust-gate](https://www.theaeocompany.co/categories/zero-trust#zero-trust-gate) A vendor is listed only when its record is in the zero trust category and at least one AI answer to the zero trust prompts names it: 5 of 5 zero trust vendors qualify. 22 vendors from other categories named in these answers are left out. A category page is published only when at least 2 vendors qualify. Source: The AEO Index, Q3 2026 edition. ### How often do AI answers cite zero trust vendors as sources? [#zero-trust-citations](https://www.theaeocompany.co/categories/zero-trust#zero-trust-citations) 70 of 312 zero trust AI answers (22%) cite at least one listed zero trust vendor as a source. Palisk is cited most often, in 55 of those answers. Last reviewed October 2, 2026. Source: The AEO Index, Q3 2026 edition. ## Other categories in Cybersecurity - Cloud security (4 vendors): https://www.theaeocompany.co/categories/cloud-security - Email security (5 vendors): https://www.theaeocompany.co/categories/email-security - Endpoint security (4 vendors): https://www.theaeocompany.co/categories/endpoint-security - Identity and access (4 vendors): https://www.theaeocompany.co/categories/identity-and-access - SOC 2 automation (5 vendors): https://www.theaeocompany.co/categories/soc-2-automation ## More - All categories: https://www.theaeocompany.co/categories - 27 Cybersecurity Brands Ranked by AI Answer Share (2026): https://www.theaeocompany.co/lists/cybersecurity-ai-answer-share