Open source alternatives to Splunk

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lokiv3.7.10grafana/loki

Like Prometheus, but for logs.

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elasticsearchv8.19.25elastic/elasticsearch

Free and Open Source, Distributed, RESTful Search Engine

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OpenSearch2.19.7opensearch-project/OpenSearch

🔎 Open source distributed and RESTful search engine.

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openobservev1.1.2openobserve/openobserve

Open source observability platform for logs, metrics, traces, RUM (web, android, ios), Session replay, pipelines, SLO and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.

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wazuhv4.14.10wazuh/wazuh

Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.