Cloud · head to head
Skopeo vs Jaeger
Skopeo
Cloud
Inspect, copy and sign container images without pulling them
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Skopeo single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution; Jaeger tracing is only as good as the instrumentation, and partial instrumentation produces misleading gaps
- They diverge on capability: Skopeo covers Remote inspection, Jaeger covers Distributed trace search.
Where they differ
Only the attributes on which Skopeo and Jaeger actually diverge.
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated), category (Cloud).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Skopeo
- Remote inspection
- Registry-to-registry copy
- Format conversion
- Image signing
Only in Jaeger
- Distributed trace search
- Dependency graph
- Adaptive sampling
- Pluggable storage
What people use each for
The jobs each tool is most often brought in to do.
Skopeo
- Promoting images between staging and production registries without a round tripnot Jaeger
- Inspecting an image’s contents before deciding to deploy itnot Jaeger
- Mirroring images into an air-gapped or internal registrynot Jaeger
Jaeger
- Finding which service in a request path causes the latencynot Skopeo
- Understanding real service dependencies rather than the diagram on the wikinot Skopeo
- Debugging failures that only appear under production traffic patternsnot Skopeo
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Skopeo
- Single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
- Command syntax with transport prefixes such as docker:// is unusual and trips people up initially
- Documentation is sparse compared with the rest of the container ecosystem
Jaeger
- Tracing is only as good as the instrumentation, and partial instrumentation produces misleading gaps
- Storage is the real operational cost: high-volume tracing on Elasticsearch or Cassandra is a cluster to run and pay for
- Traces alone, without correlated metrics and logs, leave you switching between tools during an incident
Pricing, plan by plan
Skopeo
Free- SkopeoFree
- Full functionality
- No usage limits
- Community support
Jaeger
Free- JaegerFree
- Full functionality
- No usage limits
- Community support
Which should you pick?
Choose Skopeo if
- You need remote inspection.
- You want to start without paying.
- You work on Linux, macOS.
- You also want registry-to-registry copy.
Choose Jaeger if
- You need distributed trace search.
- You want to start without paying.
- You work on Linux, Kubernetes, Docker.
- You also want dependency graph.
Questions people ask
- Is Skopeo or Jaeger better?
- Neither clearly leads. Skopeo starts at Free and Jaeger at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Skopeo or Jaeger?
- Skopeo starts at Free and Jaeger at Free.
- Does Skopeo or Jaeger run on more platforms?
- Skopeo runs on Linux, macOS. Jaeger runs on Linux, Kubernetes, Docker.
- Can I use Skopeo for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Skopeo best used for?
- Skopeo is most often used for promoting images between staging and production registries without a round trip, inspecting an image’s contents before deciding to deploy it, mirroring images into an air-gapped or internal registry. Of those, promoting images between staging and production registries without a round trip and inspecting an image’s contents before deciding to deploy it are not what Jaeger is typically brought in for.
- What can Skopeo do that Jaeger cannot?
- Skopeo covers Remote inspection, Registry-to-registry copy, Format conversion, Image signing. Jaeger covers Distributed trace search, Dependency graph, Adaptive sampling, Pluggable storage.
Answered from the vendors’ own pages
Skopeo: Is Skopeo free?
Yes, open source with no licence fee.
Jaeger: Is Jaeger free?
Yes, open source and CNCF-graduated. Costs are the storage backend you run.
Skopeo: Why copy images without pulling them?
A registry-to-registry copy avoids downloading and re-uploading gigabytes, which is faster and much cheaper on bandwidth in CI.
Jaeger: Do I use Jaeger or OpenTelemetry?
Both, usually. Instrument with OpenTelemetry and use Jaeger to store and query the traces.
Skopeo: Can Skopeo run containers?
No. It only inspects, copies, signs and deletes images. Running them is Podman’s or Docker’s job.
Jaeger: Does Jaeger handle metrics and logs?
No. It is a tracing system. Metrics and logs need Prometheus, Loki or an equivalent.
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