Cortex vs VictoriaMetrics
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
VictoriaMetrics
Fast, cost-effective time series database and monitoring solution
| Feature | Cortex | VictoriaMetrics |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 90 · 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 | ★ 5,865 | ★ 17,760 |
| First released | 2016 | 2018 |
| Replaces | Datadog, Grafana Cloud | Datadog, Grafana Cloud |
What are Cortex and VictoriaMetrics?
Cortex
Cortex provides a horizontally scalable, highly available, multi-tenant, long-term store for Prometheus metrics. It offers a single API endpoint for querying and writing time series data across clusters.
- Multi-tenant metrics storage
- Horizontally scalable
- Prometheus-compatible API
- Long-term retention
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
Cortex 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 Cortex. Cortex is the more established project (first released 2016), while VictoriaMetrics arrived in 2018. VictoriaMetrics has the considerably larger community, at 17,760 GitHub stars versus 5,865.
Why pick each one
Choose Cortex if…
- Built for very large scale
- True multi-tenancy
Watch out for
- Operationally heavy
- Overkill for small setups
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 Cortex or VictoriaMetrics better?
VictoriaMetrics 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 VictoriaMetrics free and open-source?
Yes. Cortex is licensed under Apache-2.0 and VictoriaMetrics under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Cortex and VictoriaMetrics with Docker?
Cortex: yes. VictoriaMetrics: yes.
Which is lighter on resources, Cortex or VictoriaMetrics?
VictoriaMetrics has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for Cortex. Real-world usage depends on library size, user count, and enabled features.