Apache SkyWalking 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 | Apache SkyWalking | Thanos |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 97 · Excellent | 94 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | Go |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 1,024 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, helm |
| GitHub stars | ★ 24,962 | ★ 14,214 |
| First released | 2015 | 2018 |
| Replaces | New Relic, Datadog | Datadog, Grafana Cloud |
What are Apache SkyWalking and Thanos?
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
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
Apache SkyWalking vs Thanos: key differences
Apache SkyWalking is written in Java, while Thanos is built with Go. Thanos is the lighter option, starting around 1,024 MB of RAM against 2,048 MB for Apache SkyWalking. Apache SkyWalking is the more established project (first released 2015), while Thanos arrived in 2018.
Why pick each one
Choose Apache SkyWalking if…
- Full observability suite
- Strong Apache governance
Watch out for
- Steep learning curve
- Storage backend required
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 Apache SkyWalking or Thanos better?
Neither is universally better. Apache SkyWalking has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Apache SkyWalking and Thanos free and open-source?
Yes. Apache SkyWalking is licensed under Apache-2.0 and Thanos under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Apache SkyWalking and Thanos with Docker?
Apache SkyWalking: yes. Thanos: yes.
Which is lighter on resources, Apache SkyWalking or Thanos?
Thanos has the smaller minimum footprint at 1,024 MB of RAM, compared to about 2,048 MB for Apache SkyWalking. Real-world usage depends on library size, user count, and enabled features.