Prometheus vs Apache SkyWalking
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
Prometheus
Metrics-based monitoring and alerting toolkit
VS
Apache SkyWalking
APM and observability for cloud-native architectures
| Feature | Prometheus | Apache SkyWalking |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 100 · Excellent | 97 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Java |
| Setup difficulty | Medium | Hard |
| Min. RAM | 512 MB | 2,048 MB |
| Deployment | docker, binary, helm | docker, kubernetes, helm |
| GitHub stars | ★ 66,196 | ★ 24,962 |
| First released | 2015 | 2015 |
| Replaces | Datadog | New Relic, Datadog |
What are Prometheus and Apache SkyWalking?
Prometheus
Prometheus is a metrics-based monitoring system and time-series database with a powerful query language and alerting. It targets engineers monitoring cloud-native infrastructure. It is deployed via Docker, binaries, or Helm.
- Pull-based metrics collection
- PromQL query language
- Built-in alerting rules
- Cloud-native standard
Apache SkyWalking
Apache SkyWalking is an APM and observability platform for distributed systems, especially microservices and cloud-native architectures. It provides tracing, metrics, logging, and service topology analysis.
- Distributed tracing and metrics
- Service topology maps
- eBPF and OTel integration
- Alerting engine
Prometheus vs Apache SkyWalking: key differences
Prometheus is written in Go, while Apache SkyWalking is built with Java. Prometheus is the lighter option, starting around 512 MB of RAM against 2,048 MB for Apache SkyWalking. Prometheus has the considerably larger community, at 66,196 GitHub stars versus 24,962.
Why pick each one
Choose Prometheus if…
- Powerful query language
- Reliable and scalable
- Huge ecosystem
Watch out for
- No long-term storage by default
- Dashboards need Grafana
Choose Apache SkyWalking if…
- Full observability suite
- Strong Apache governance
Watch out for
- Steep learning curve
- Storage backend required
Frequently asked questions
Is Prometheus or Apache SkyWalking better?
Prometheus is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Apache SkyWalking if its specific feature set fits your needs better.
Are Prometheus and Apache SkyWalking free and open-source?
Yes. Prometheus is licensed under Apache-2.0 and Apache SkyWalking under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Prometheus and Apache SkyWalking with Docker?
Prometheus: yes. Apache SkyWalking: yes.
Which is lighter on resources, Prometheus or Apache SkyWalking?
Prometheus has the smaller minimum footprint at 512 MB of RAM, compared to about 2,048 MB for Apache SkyWalking. Real-world usage depends on library size, user count, and enabled features.