The best open source alternative to CrowdStrike is wazuh. If that doesn't suit you, we've compiled a ranked list of open source CrowdStrike alternatives to help you find a replacement.
CrowdStrike is a cloud-delivered endpoint security platform, built around its Falcon agent, that provides antivirus, threat detection, and incident response for organizations. It analyzes endpoint activity in the cloud to detect malware and suspicious behavior, and its platform extends into areas like identity protection and cloud workload security.
Organizations look for open-source alternatives to CrowdStrike for cost reasons, since per-endpoint licensing scales with the size of an organization and adds up quickly at scale. Some also want a security stack they can inspect and customize rather than relying entirely on a vendor's closed detection rules, or need a solution that keeps security telemetry on infrastructure they control rather than a third-party cloud.
Wazuh is a common open-source option in this space. It combines endpoint detection, log analysis, file integrity monitoring, and compliance reporting into a single platform that you deploy and manage yourself. It is closer to a SIEM and endpoint detection and response tool than a pure antivirus replacement, so it covers a broad set of CrowdStrike's monitoring and detection capabilities, though the two products differ in how detections are built and maintained.
Before switching, understand that Wazuh requires your team to manage the server infrastructure, tune detection rules, and keep the system updated, work that CrowdStrike handles as a managed service. Evaluate whether your team has the security expertise to run and maintain this kind of platform, since detection quality depends heavily on configuration. Also check compliance requirements specific to your industry, since some certifications expect a vendor-backed security product with formal support agreements.