Cloud · head to head
Jaeger vs Linkerd
The short version
- Each has a real cost: Jaeger tracing is only as good as the instrumentation, and partial instrumentation produces misleading gaps; Linkerd deliberately fewer features than Istio, so complex routing and multi-cluster policy can hit its limits
- They diverge on capability: Jaeger covers Distributed trace search, Linkerd covers Automatic mutual TLS.
Where they differ
Only the attributes on which Jaeger and Linkerd 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 Jaeger
- Distributed trace search
- Dependency graph
- Adaptive sampling
- Pluggable storage
Only in Linkerd
- Automatic mutual TLS
- Golden metrics
- Rust micro-proxy
- Traffic policy
What people use each for
The jobs each tool is most often brought in to do.
Jaeger
- Finding which service in a request path causes the latencynot Linkerd
- Understanding real service dependencies rather than the diagram on the wikinot Linkerd
- Debugging failures that only appear under production traffic patternsnot Linkerd
Linkerd
- Adding mutual TLS between services to satisfy a compliance requirementnot Jaeger
- Getting per-service latency and success rates without instrumenting applicationsnot Jaeger
- Progressive delivery with traffic splitting during rolloutsnot Jaeger
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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
Linkerd
- Deliberately fewer features than Istio, so complex routing and multi-cluster policy can hit its limits
- Kubernetes only, with no story for workloads outside a cluster
- A sidecar per pod is still real memory and latency overhead, however small, and a mesh is another layer to debug during incidents
Pricing, plan by plan
Jaeger
Free- JaegerFree
- Full functionality
- No usage limits
- Community support
Linkerd
Free- LinkerdFree
- Full functionality
- No usage limits
- Community support
Which should you pick?
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.
Choose Linkerd if
- You need automatic mutual tls.
- You want to start without paying.
- You work on Kubernetes, Linux.
- You also want golden metrics.
Questions people ask
- Is Jaeger or Linkerd better?
- Neither clearly leads. Jaeger starts at Free and Linkerd at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Jaeger or Linkerd?
- Jaeger starts at Free and Linkerd at Free.
- Does Jaeger or Linkerd run on more platforms?
- Jaeger runs on Linux, Kubernetes, Docker. Linkerd runs on Kubernetes, Linux.
- Can I use Jaeger for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Jaeger best used for?
- Jaeger is most often used for finding which service in a request path causes the latency, understanding real service dependencies rather than the diagram on the wiki, debugging failures that only appear under production traffic patterns. Of those, finding which service in a request path causes the latency and understanding real service dependencies rather than the diagram on the wiki are not what Linkerd is typically brought in for.
- What can Jaeger do that Linkerd cannot?
- Jaeger covers Distributed trace search, Dependency graph, Adaptive sampling, Pluggable storage. Linkerd covers Automatic mutual TLS, Golden metrics, Rust micro-proxy, Traffic policy.
Answered from the vendors’ own pages
Jaeger: Is Jaeger free?
Yes, open source and CNCF-graduated. Costs are the storage backend you run.
Linkerd: Is Linkerd free?
The open-source project is free. Buoyant, its maintainer, sells enterprise distributions and support separately.
Jaeger: Do I use Jaeger or OpenTelemetry?
Both, usually. Instrument with OpenTelemetry and use Jaeger to store and query the traces.
Linkerd: Linkerd or Istio?
Linkerd trades features for simplicity, with a smaller proxy and far less configuration. Istio is more capable and correspondingly more work to run.
Jaeger: Does Jaeger handle metrics and logs?
No. It is a tracing system. Metrics and logs need Prometheus, Loki or an equivalent.
Linkerd: Do I need a service mesh at all?
Only if you need mutual TLS, uniform retries or per-service traffic metrics across many services. For a handful of services it is usually more machinery than the problem justifies.
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