Prelude Security is a cybersecurity company focused on endpoint security and continuous security testing. The company offers a platform built around two core capabilities: security control monitoring (Monitor) and endpoint security (Defend), which together enable organizations to assess and validate the effectiveness of their security controls against real-world threats. The platform allows organizations to run continuous, automated security tests against their endpoints to verify that defenses are functioning as expected. Prelude has notably introduced continuous security testing for containers, a capability covered by Dark Reading and CSO Online in 2023. The company integrates with existing security tools via read-only integrations, avoiding the need for additional agents, and provides reporting dashboards tailored for different stakeholders, from help desk personnel to executive leadership. Prelude targets organizations seeking to proactively validate their endpoint security posture rather than rely solely on reactive detection. The company has partnered with CrowdStrike, which also made an investment in 2022, positioning Prelude's capabilities as complementary to XDR solutions. Notable customers include Lemonade, selected in 2024 to help fortify its defenses. The company is backed by investors including Sequoia Capital, Insight Partners, and Brightmind Partners, raising an additional $16M in September 2025. Prelude operates as a fully remote company with employees in the United States, Canada, and Israel, and holds SOC 2 certification. It was incorporated as Prelude Research, Inc.