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Log Management · head to head

Elastic APM vs Fluent Bit

Elastic APM logo

Elastic APM

Log Management

Application Performance Monitoring from Elastic

From
Free
Rated
-
Full reviewWebsite
Fluent Bit logo

Fluent Bit

Log Management

Fast and Lightweight Log Processor

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Elastic APM pricing is not published on the product page; cost follows the underlying Elastic deployment rather than being quoted per host or per service; Fluent Bit fluent Bit ships over 100 built in plugins against more than 1,000 external plugins available for Fluentd, so fewer integrations exist out of the box
  • They diverge on capability: Elastic APM covers Performance monitoring, Fluent Bit covers Log collection.

Where they differ

Only the attributes on which Elastic APM and Fluent Bit actually diverge.

Attributes where Elastic APM and Fluent Bit differ
AttributeElastic APMFluent Bit
Founded20112015

Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), platforms (Web, Api), user rating (Not yet rated), category (Log Management).

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 Elastic APM

  • Performance monitoring
  • Error tracking
  • Transaction tracing
  • Custom metrics

Only in Fluent Bit

  • Log collection
  • Lightweight processing
  • Data parsing
  • Event filtering

Both cover

  • API
  • Webhooks
  • REST
  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

Elastic APM

  • Distributed tracing across microservicesnot Fluent Bit
  • Auto-instrumenting Java, .NET, Python, Go, Node.js, Ruby, PHP and C++ servicesnot Fluent Bit
  • OpenTelemetry-native collection through the Elastic distributionsnot Fluent Bit
  • Correlating latency and errors with machine learningnot Fluent Bit
  • Monitoring LLM calls alongside application tracesnot Fluent Bit

Fluent Bit

  • Lightweight log and metric forwarding from containers and edge devicesnot Elastic APM
  • Kubernetes node level log collection with a small memory footprintnot Elastic APM
  • Filtering and enriching telemetry before shipping it to a backendnot Elastic APM

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Elastic APM

  • Pricing is not published on the product page; cost follows the underlying Elastic deployment rather than being quoted per host or per service
  • Self-managed deployment means running and scaling Elasticsearch yourself
  • Serverless does not carry every capability the hosted option does

Fluent Bit

  • Fluent Bit ships over 100 built in plugins against more than 1,000 external plugins available for Fluentd, so fewer integrations exist out of the box
  • It is written in C, so extending it beyond the built in plugins means writing C rather than Ruby
  • Dependencies are zero only until a plugin requires one

Pricing, plan by plan

Elastic APM

Free
  • FreeFree
    • Performance monitoring
    • Error tracking
    • Transaction tracing

Fluent Bit

Free
  • FreeFree
    • Log collection
    • Lightweight processing
    • Data parsing

Which should you pick?

Choose Elastic APM if

  • You need performance monitoring.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want error tracking.
Elastic APM review

Choose Fluent Bit if

  • You need log collection.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want lightweight processing.
Fluent Bit review

Questions people ask

Is Elastic APM or Fluent Bit better?
Neither clearly leads. Elastic APM starts at Free and Fluent Bit at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Elastic APM or Fluent Bit?
Elastic APM starts at Free and Fluent Bit at Free.
Does Elastic APM or Fluent Bit run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Elastic APM for free?
Both have a free tier, so you can try either at no cost before committing.
What is Elastic APM best used for?
Elastic APM is most often used for distributed tracing across microservices, auto-instrumenting java, .net, python, go, node.js, ruby, php and c++ services, opentelemetry-native collection through the elastic distributions, correlating latency and errors with machine learning. Of those, distributed tracing across microservices and auto-instrumenting java, .net, python, go, node.js, ruby, php and c++ services are not what Fluent Bit is typically brought in for.
What can Elastic APM do that Fluent Bit cannot?
Elastic APM covers Performance monitoring, Error tracking, Transaction tracing, Custom metrics. Fluent Bit covers Log collection, Lightweight processing, Data parsing, Event filtering. Both handle API, Webhooks, REST, Web support.
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