Harvey announced on September 9, 2026, its acquisition of Guardrails AI, a San Francisco-based AI security platform for agents, in what the legal AI company said is its fourth acquisition of 2026. Guardrails co-founders Shreya Rajpal and Zayd Simjee and their team will join Harvey’s product and engineering organization. Harvey chief executive Winston Weinberg said firms ask the same question before they let an agent near real client work: how do you know what it will do. “Guardrails has spent…