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Logging · head to head

Fluent Bit vs Telegraf

Fluent Bit logo

Fluent Bit

Logging

Fast and Lightweight Log Processor

From
Free
Rated
-
Full reviewWebsite
Telegraf logo

Telegraf

Logging

The Plugin-Driven Server Agent for Collecting and Reporting Metrics

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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; Telegraf telegraf's core is open source and free, and InfluxData names a separate Telegraf Enterprise tier for teams running it at scale with no price published
  • They diverge on capability: Fluent Bit covers Log collection, Telegraf covers Metrics collection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Fluent Bit and Telegraf actually diverge.

Attributes where Fluent Bit and Telegraf differ
AttributeFluent BitTelegraf
Founded20152013

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

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 Fluent Bit

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

Only in Telegraf

  • Metrics collection
  • System monitoring
  • Application monitoring
  • Plugin architecture

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.

Fluent Bit

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

Telegraf

  • Log monitoringnot Fluent Bit
  • Application performancenot Fluent Bit
  • Security analyticsnot Fluent Bit
  • Troubleshootingnot Fluent Bit

Where each one falls short

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

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

Telegraf

  • Telegraf's core is open source and free, and InfluxData names a separate Telegraf Enterprise tier for teams running it at scale with no price published

Pricing, plan by plan

Fluent Bit

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

Telegraf

Free
  • FreeFree
    • Metrics collection
    • System monitoring
    • Application monitoring

Which should you pick?

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

Choose Telegraf if

  • You need metrics collection.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want system monitoring.
Telegraf review

Questions people ask

Is Fluent Bit or Telegraf better?
Neither clearly leads. Fluent Bit starts at Free and Telegraf at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fluent Bit or Telegraf?
Fluent Bit starts at Free and Telegraf at Free.
Does Fluent Bit or Telegraf run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Fluent Bit for free?
Both have a free tier, so you can try either at no cost before committing.
What is Fluent Bit best used for?
Fluent Bit is most often used for lightweight log and metric forwarding from containers and edge devices, kubernetes node level log collection with a small memory footprint, filtering and enriching telemetry before shipping it to a backend. Of those, lightweight log and metric forwarding from containers and edge devices and kubernetes node level log collection with a small memory footprint are not what Telegraf is typically brought in for.
What can Fluent Bit do that Telegraf cannot?
Fluent Bit covers Log collection, Lightweight processing, Data parsing, Event filtering. Telegraf covers Metrics collection, System monitoring, Application monitoring, Plugin architecture. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Fluent Bit: Is Fluent Bit free?

Yes, Fluent Bit is a CNCF graduated open-source project with no vendor lock-in and is freely available for download and use.

Source
Telegraf: Is Telegraf free to use?

Yes, Telegraf OSS is free and open source. It can be downloaded and used at no cost for collecting metrics from infrastructure, applications, and devices using over 400 community-tested plugins.

Source
Fluent Bit: Does Fluent Bit offer an Enterprise option?

The website navigation mentions an Enterprise section suggesting paid offerings exist, but specific pricing and details are not provided on the publicly available pages.

Source
Telegraf: What is Telegraf Enterprise and how much does it cost?

Telegraf Enterprise is a commercial offering for managing Telegraf at scale. It is licensed annually with entry-level packages starting at $18,000 per year, and pricing scales based on the total number of Telegraf agents under management.

Source
Telegraf: Can I try Telegraf Enterprise before purchasing?

Yes, a free tier of Telegraf Controller is available for evaluation. It allows you to store up to 20 configurations and manage up to 100 reporting agents.

Source
Telegraf: Can Telegraf OSS be used for commercial purposes?

Telegraf OSS is free and available as open source software, suitable for commercial deployments without licensing fees. For large-scale enterprise needs, Telegraf Enterprise is the commercial offering.

Source
Telegraf: How many plugins does Telegraf support?

Telegraf includes over 400 community-tested plugins that can connect to various data sources and destinations including Kubernetes, Docker, AWS, Google Cloud, Azure, Kafka, and many databases.

Source
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