Thanos vs VictoriaMetrics
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
VS
VictoriaMetrics
Fast, cost-effective time series database and monitoring solution
| Feature | Thanos | VictoriaMetrics |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 94 · Excellent | 95 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, helm |
| GitHub stars | ★ 14,214 | ★ 17,760 |
| First released | 2018 | 2018 |
| Replaces | Datadog, Grafana Cloud | Datadog, Grafana Cloud |
What are Thanos and VictoriaMetrics?
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
VictoriaMetrics
VictoriaMetrics is a fast, cost-effective, and scalable monitoring solution and time series database. It is a drop-in replacement for Prometheus storage with lower resource usage and a high-performance query engine.
- Low memory footprint
- MetricsQL query language
- Single-binary or cluster mode
- Prometheus-compatible
Thanos vs VictoriaMetrics: key differences
Both projects are written in Go. VictoriaMetrics is the lighter option, starting around 256 MB of RAM against 1,024 MB for Thanos.
Why pick each one
Choose Thanos if…
- Scales Prometheus to massive deployments
- Cheap long-term storage
Watch out for
- Complex multi-component architecture
- Steep learning curve
Choose VictoriaMetrics if…
- Excellent compression and speed
- Easy single-binary deployment
Watch out for
- MetricsQL differs slightly from PromQL
- Smaller ecosystem than Prometheus
Frequently asked questions
Is Thanos or VictoriaMetrics better?
VictoriaMetrics is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Thanos if its specific feature set fits your needs better.
Are Thanos and VictoriaMetrics free and open-source?
Yes. Thanos is licensed under Apache-2.0 and VictoriaMetrics under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Thanos and VictoriaMetrics with Docker?
Thanos: yes. VictoriaMetrics: yes.
Which is lighter on resources, Thanos or VictoriaMetrics?
VictoriaMetrics 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.