Cortex vs Grafana Loki

A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
FeatureCortexGrafana Loki
CategoryMonitoring & StatusMonitoring & Status
LicenseApache-2.0AGPL-3.0
LanguageGoGo
Setup difficultyHardMedium
Min. RAM1,024 MB512 MB
Deploymentdocker, kubernetes, helmdocker, kubernetes, helm
GitHub stars★ 5,844★ 28,687
First released20162018
ReplacesDatadog, Grafana CloudSplunk, Datadog Logs

Why pick each one

Choose Cortex if…

  • Built for very large scale
  • True multi-tenancy
Cortex details

Choose Grafana Loki if…

  • Cheap to run compared to full-text indexers
  • Familiar Prometheus-style labels
Grafana Loki details

Frequently asked questions

Is Cortex or Grafana Loki better?

Grafana Loki is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Cortex if its specific feature set fits your needs better.

Are Cortex and Grafana Loki free and open-source?

Yes. Cortex is licensed under Apache-2.0 and Grafana Loki under AGPL-3.0. Both can be self-hosted at no software cost.

Can I run Cortex and Grafana Loki with Docker?

Cortex: yes. Grafana Loki: yes.

Related comparisons