OpenObserve
94 · HealthyObservability platform for logs, metrics, traces and real user monitoring, built for low storage costs.
Open source alternatives to Splunk
4 open source projects replace Splunk, ranked by how safe each is to depend on.
SigNoz
92 · HealthyOpenTelemetry-native observability with logs, metrics and traces in one app.
Grafana
90 · HealthyDashboards and alerting over metrics, logs and traces from Prometheus, Loki, SQL databases and many other sources.
Loki
90 · HealthyLog aggregation that indexes labels rather than full text to keep storage cheap, queried from Grafana.
At a glance
Health and license are separate verdicts: a project can be well maintained and still not be open source.
| Project | Health | License | Stars |
|---|---|---|---|
| OpenObserve | 94 · Healthy | Free, share hosted changesAGPL-3.0Relicensed 2023 | 22k |
| SigNoz | 92 · Healthy | Free core, paid extrasMIT | 32k |
| Grafana | 90 · Healthy | Free, share hosted changesAGPL-3.0Relicensed 2021 | 77k |
| Loki | 90 · Healthy | Free, share hosted changesAGPL-3.0Relicensed 2021 | 29k |
More in Monitoring & error tracking
Splunk is a paid monitoring & error tracking product. See all open source monitoring & error tracking tools, ranked the same way.
Scores last refreshed from GitHub on 9 October 2026. How we score.