Vanta agrees to acquire Pillar Security for roughly $150M
The automated compliance platform is buying the AI security startup to expand into model defense and testing.
Image: Pillar Security
Compliance automation provider Vanta has entered into a definitive agreement to acquire Pillar Security for approximately $150 million [1].
Founded in 2023 by Ziv Karliner and Dor Sarig, Pillar Security develops software designed to uncover, evaluate, and shield artificial intelligence systems against security vulnerabilities [1]. The startup previously raised $9 million in seed capital in April 2025 from investors including Shield Capital, Golden Ventures, and Ground Up Ventures [1].
Addressing the operational necessity of active defenses over static guidelines, Vanta chief executive officer Christina Cacioppo stated that "a policy document doesn't get you there" [1]. Karliner added that the platform is designed to secure AI systems in real time [1]. The transaction marks an expansion for Vanta beyond traditional automated governance workflows and into active runtime protection for autonomous AI deployments [1].
Questions and answers
How much is Vanta paying for Pillar Security?
Vanta agreed to acquire Pillar Security for approximately $150 million.
What does Pillar Security do?
Pillar Security develops an AI security platform built to identify, test, and protect artificial intelligence systems.
How much venture funding had Pillar Security raised prior to the sale?
Pillar Security raised $9 million in seed financing in April 2025.
Companies & investors in this story
Sources
- 1.Vanta to acquire Israeli AI security startup Pillar for $150 million | Ctech — calcalistech.com
- 2.Vanta to Acquire Pillar Security, Adding AI Agent Testing and Runtime Protection — citybiz, Nov 9, 2026
- 3.Vanta to Acquire Pillar Security to Turn AI Policy Into Practice — Yahoo! Finance, Nov 9, 2026
- 4.Vanta To Acquire Pillar Security To Expand AI Agent Protection As Customer Base Surpasses 20,000 — Pulse 2.0, Nov 9, 2026
