Vanta to acquire Israeli AI security startup Pillar Security for about $150 million

Vanta signed a definitive agreement to acquire Israeli AI security company Pillar Security for about $150 million in cash and shares, according to Calcalist. Pillar will become Vanta's research and development center in Israel after the deal closes.

Pillar's more than 20 employees are expected to join Vanta. Founders Ziv Karliner and Dor Sarig will remain and lead its AI security business. Pillar's software discovers AI systems and agents, tests them against attacks, monitors their behavior and blocks unauthorized actions.

Vanta plans to integrate Pillar's technology into its security, risk and compliance platform during 2027. Planned additions include an inventory that maps AI applications, models, agents and Model Context Protocol servers, plus monitoring that detects suspicious activity and policy violations.

Pillar, founded in 2023, has raised $9 million. Vanta says it now serves more than 20,000 customers, up from 16,000 in the first quarter. This will be its third acquisition.