Robusta vs Thanos
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
Thanos
Highly available Prometheus setup with long-term storage
| Feature | Robusta | Thanos |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 87 · Excellent | 94 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | MIT | Apache-2.0 |
| Language | Python | Go |
| Setup difficulty | Medium | Hard |
| Min. RAM | 256 MB | 1,024 MB |
| Deployment | kubernetes, helm | docker, kubernetes, helm |
| GitHub stars | ★ 3,101 | ★ 14,214 |
| First released | 2021 | 2018 |
| Replaces | Datadog, PagerDuty | Datadog, Grafana Cloud |
What are Robusta and Thanos?
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
Thanos
Thanos extends Prometheus with global query view, unlimited retention, and high availability. It uses object storage to keep metrics cheaply for years while presenting a single query endpoint across many Prometheus instances.
- Global query view
- Unlimited metric retention
- Object storage backend
- Downsampling for fast queries
Robusta vs Thanos: key differences
Robusta is written in Python, while Thanos is built with Go. Licensing differs — MIT for Robusta versus Apache-2.0 for Thanos. Robusta is the lighter option, starting around 256 MB of RAM against 1,024 MB for Thanos. Thanos is the more established project (first released 2018), while Robusta arrived in 2021. Thanos has the considerably larger community, at 14,214 GitHub stars versus 3,101. Thanos lists first-class Docker deployment; Robusta does not.
Why pick each one
Choose Robusta if…
- Makes alerts actionable
- Strong Kubernetes focus
Watch out for
- Kubernetes only
- Best with Prometheus already running
Choose Thanos if…
- Scales Prometheus to massive deployments
- Cheap long-term storage
Watch out for
- Complex multi-component architecture
- Steep learning curve
Frequently asked questions
Is Robusta or Thanos better?
Neither is universally better. Thanos 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 Robusta and Thanos free and open-source?
Yes. Robusta is licensed under MIT and Thanos under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Robusta and Thanos with Docker?
Robusta: check the project docs for container support. Thanos: yes.
Which is lighter on resources, Robusta or Thanos?
Robusta has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for Thanos. Real-world usage depends on library size, user count, and enabled features.