Cortex vs Pulse Monitor
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Cortex | Pulse Monitor |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 90 · Excellent | 91 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | Apache-2.0 | MIT |
| Language | Go | Go |
| Setup difficulty | Hard | Easy |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, kubernetes, helm | docker |
| GitHub stars | ★ 5,865 | ★ 6,742 |
| First released | 2016 | 2024 |
| Replaces | Datadog, Grafana Cloud | Datadog |
What are Cortex and Pulse Monitor?
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
Pulse Monitor
Pulse is a self-hosted monitoring application focused on Proxmox VE and PBS environments, surfacing node, VM, and backup health. It provides real-time dashboards and alerting.
- Proxmox monitoring
- VM and node health
- Backup status
- Real-time dashboards
Cortex vs Pulse Monitor: key differences
Both projects are written in Go. Licensing differs — Apache-2.0 for Cortex versus MIT for Pulse Monitor. Pulse Monitor 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 Pulse Monitor arrived in 2024.
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 Pulse Monitor if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Mature project with 6.7k GitHub stars
Frequently asked questions
Is Cortex or Pulse Monitor better?
Pulse Monitor is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Cortex if its specific feature set fits your needs better.
Are Cortex and Pulse Monitor free and open-source?
Yes. Cortex is licensed under Apache-2.0 and Pulse Monitor under MIT. Both can be self-hosted at no software cost.
Can I run Cortex and Pulse Monitor with Docker?
Cortex: yes. Pulse Monitor: yes.
Which is lighter on resources, Cortex or Pulse Monitor?
Pulse Monitor 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.