Vanta Acquires Israeli AI Security Startup Pillar Security for $150 Million
American security platform Vanta is acquiring Israeli AI security startup Pillar Security for approximately $150 million in a cash-and-stock deal. Pillar's R&D center in Israel will integrate its technology into Vanta's Agentic Trust platform.
American security and compliance platform Vanta has signed an agreement to acquire Israeli AI security startup Pillar Security for approximately $150 million, according to reports from local media. The transaction will be structured as a combination of cash and stock.
Upon completion of the acquisition, Pillar will become Vanta's research and development center in Israel, and its technology will be integrated into the buyer's Agentic Trust platform, which currently serves over 20,000 customers. Pillar employs more than 20 people who will continue working at the new R&D hub, while the company's founders will remain with Vanta to lead its AI security development division.
Founded in 2023 by Ziv Karliner and Dor Sarig, Pillar has raised $9 million from Shield, Ground Up, and other investors. The startup developed a platform that enables organizations to map their AI systems and agents, test their resilience against attacks, and protect them during active operations. Its clientele includes Fortune 500 companies alongside leading technology and financial institutions.
"Customers, regulators, and auditors want to see that a company's AI systems are indeed operating correctly according to organizational definitions," said Christina Cacioppo, CEO and co-founder of Vanta. "A policy document alone is not enough. Pillar allows companies to test their agents and stop them when they exceed defined boundaries, and Vanta turns these operations into documented proof."
Commenting on the deal, Pillar CEO and co-founder Ziv Karliner stated:
"We founded Pillar out of a belief that to properly protect AI, one must understand the business environment in which it operates. Vanta has a more complete picture of the business environment than any other company."
This marks Vanta's third acquisition, following its purchase of Riskey in July 2025 and Trustpage in January 2023. The company serves over 20,000 clients, up from 16,000 in the first quarter of 2026, and surpassed $300 million in annual recurring revenue in April 2026.
