Best Open Source Alternatives to Splunk

Grafana is an open-source observability platform replacing proprietary APM tools with decoupled, high-performance dashboards over any database.

vs Splunk: a free, open-source option you fully control, licensed AGPL-3.0.

Open-source vulnerability scanner using YAML templates to detect CVEs, misconfigurations, and protocol flaws across applications and infrastructure.

vs Splunk: a free, open-source option you fully control, licensed MIT.

Grafana Loki is a log aggregation engine replacing Splunk and CloudWatch Logs with cost-effective label indexing and native S3 object storage.

vs Splunk: a free, open-source option you fully control, licensed AGPL-3.0.

Vector is an open-source observability pipeline replacing heavy log forwarders like Splunk UF with high-throughput, memory-efficient telemetry routing.

vs Splunk: a free, open-source option you fully control, licensed MPL-2.0.

OpenObserve replaces Splunk with an S3-native log and telemetry engine that uses Parquet columnar storage and SQL to lower infrastructure costs.

vs Splunk: a free, open-source option you fully control, licensed AGPL-3.0.