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HELK is an open-source threat-hunting and security analytics platform built around Elasticsearch, Logstash, Kibana, and Kafka. It is designed for security researchers and blue teams investigating endpoint and network telemetry, but its repository is no longer actively maintained.
💡 Pick it for a maintained, full-stack replacement with network monitoring, detection, and case management built in.
Security Onion is an open-source platform for network security monitoring.
Free and paid support options
Elastic
💡 Pick it for the closest actively developed Elastic-based successor with modern SIEM and endpoint features.
Elastic Security is a SIEM and security analytics platform built on Elasticsearch for collecting, searching, detecting, and investigating security data. It suits...
Free self-managed; cloud usage-based
💡 Pick it when enterprise support, mature investigations, and broad integrations matter more than open-source cost.
Splunk is a software platform for searching, monitoring, and analyzing machine-generated big data, via a web-style interface.
Varies based on usage and features
💡 Pick it for a free, actively maintained option centered on endpoint monitoring, vulnerability detection, and compliance.
Wazuh is a security information and event management platform that integrates with Elastic Stack for threat detection, integrity monitoring, incident response, and...
Free and paid plans available
Microsoft
💡 Pick it for a managed cloud SIEM with deep Microsoft 365 and Azure integration instead of maintaining HELK yourself.
Microsoft Sentinel is a cloud-native SIEM and security orchestration platform for organizations operating in Azure, Microsoft 365, and hybrid environments. It combines...
Usage-based; free tier available
💡 Pick it for simpler self-hosted log management and alerting when HELK's multi-component architecture is too cumbersome.
Graylog is an open-source log management platform that helps you to collect, index, and analyze any machine data.
Free, with enterprise support available
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