Grafana Mimir vs Robusta
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
Grafana Mimir
Scalable long-term storage for Prometheus metrics
VS
Robusta
Kubernetes observability and automated troubleshooting
| Feature | Grafana Mimir | Robusta |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 90 · Excellent | 87 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | AGPL-3.0 | MIT |
| Language | Go | Python |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, kubernetes, helm | kubernetes, helm |
| GitHub stars | ★ 5,238 | ★ 3,101 |
| First released | 2022 | 2021 |
| Replaces | Datadog, Chronosphere | Datadog, PagerDuty |
What are Grafana Mimir and Robusta?
Grafana Mimir
Grafana Mimir is an open-source, horizontally scalable, highly available, multi-tenant time series database for Prometheus and OpenTelemetry metrics. It is designed to store and query hundreds of millions of active series.
- Massive cardinality support
- Multi-tenant by design
- Fast query engine
- Object storage backend
Robusta
Robusta enhances Prometheus alerts for Kubernetes with enriched context, automated troubleshooting, and notifications to Slack and other channels. It helps teams understand and respond to cluster issues faster.
- Enriched Kubernetes alerts
- Automated remediation playbooks
- Slack and Teams notifications
- Crash and OOM diagnostics
Grafana Mimir vs Robusta: key differences
Grafana Mimir is written in Go, while Robusta is built with Python. Licensing differs — AGPL-3.0 for Grafana Mimir versus MIT for Robusta. Robusta is the lighter option, starting around 256 MB of RAM against 1,024 MB for Grafana Mimir. Grafana Mimir lists first-class Docker deployment; Robusta does not.
Why pick each one
Choose Grafana Mimir if…
- Proven at billion-series scale
- Easier to operate than Cortex
Watch out for
- Resource intensive
- Complex for small homelabs
Choose Robusta if…
- Makes alerts actionable
- Strong Kubernetes focus
Watch out for
- Kubernetes only
- Best with Prometheus already running
Frequently asked questions
Is Grafana Mimir or Robusta better?
Neither is universally better. Grafana Mimir has the larger community, while Robusta is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Grafana Mimir and Robusta free and open-source?
Yes. Grafana Mimir is licensed under AGPL-3.0 and Robusta under MIT. Both can be self-hosted at no software cost.
Can I run Grafana Mimir and Robusta with Docker?
Grafana Mimir: yes. Robusta: check the project docs for container support.
Which is lighter on resources, Grafana Mimir or Robusta?
Robusta has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for Grafana Mimir. Real-world usage depends on library size, user count, and enabled features.