Cloud · head to head
Linkerd vs Jaeger
The short version
- Each has a real cost: Linkerd deliberately fewer features than Istio, so complex routing and multi-cluster policy can hit its limits; Jaeger tracing is only as good as the instrumentation, and partial instrumentation produces misleading gaps
- They diverge on capability: Linkerd covers Automatic mutual TLS, Jaeger covers Distributed trace search.
Where they differ
Only the attributes on which Linkerd 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 Linkerd
- Automatic mutual TLS
- Golden metrics
- Rust micro-proxy
- Traffic policy
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.
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
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
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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
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
Linkerd
Free- LinkerdFree
- Full functionality
- No usage limits
- Community support
Jaeger
Free- JaegerFree
- Full functionality
- No usage limits
- Community support
Which should you pick?
Choose Linkerd if
- You need automatic mutual tls.
- You want to start without paying.
- You work on Kubernetes, Linux.
- You also want golden metrics.
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 Linkerd or Jaeger better?
- Neither clearly leads. Linkerd 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, Linkerd or Jaeger?
- Linkerd starts at Free and Jaeger at Free.
- Does Linkerd or Jaeger run on more platforms?
- Linkerd runs on Kubernetes, Linux. Jaeger runs on Linux, Kubernetes, Docker.
- Can I use Linkerd for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Linkerd best used for?
- Linkerd is most often used for adding mutual tls between services to satisfy a compliance requirement, getting per-service latency and success rates without instrumenting applications, progressive delivery with traffic splitting during rollouts. Of those, adding mutual tls between services to satisfy a compliance requirement and getting per-service latency and success rates without instrumenting applications are not what Jaeger is typically brought in for.
- What can Linkerd do that Jaeger cannot?
- Linkerd covers Automatic mutual TLS, Golden metrics, Rust micro-proxy, Traffic policy. Jaeger covers Distributed trace search, Dependency graph, Adaptive sampling, Pluggable storage.
Answered from the vendors’ own pages
Linkerd: Is Linkerd free?
The open-source project is free. Buoyant, its maintainer, sells enterprise distributions and support separately.
Jaeger: Is Jaeger free?
Yes, open source and CNCF-graduated. Costs are the storage backend you run.
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: Do I use Jaeger or OpenTelemetry?
Both, usually. Instrument with OpenTelemetry and use Jaeger to store and query the traces.
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.
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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