Fluent Bit

Fluent Bit is a super fast, lightweight, and scalable telemetry data agent and processor for logs, metrics, and traces. With over 13 billion Docker pulls, Fluent Bit is the industry standard for Kubernetes and major cloud providers, including Google, Amazon, Oracle, IBM, and Microsoft.

Fluent Bit bird

From any source to any destination

Fluent Bit is the industry standard open source solution for routing data from any source to any destination.

Fluent Bit sources and destination (old version)

Why Fluent Bit?

Open standards

Fluent Bit includes support for open standards including OpenTelemetry, Prometheus, OpenMetrics, and Syslog.

100+ plugins and extensions

An extensive plugin library makes connecting sources and destinations easy and allows you to apply complex transformations to data in flight.

Powerful processing

Add structure to your logs with built-in parsers. Transform and filter logs, metrics, and traces before sending them to their final destinations.

Routing to multiple destinations

Collect logs once and route to multiple destinations, including Kafka, Elasticsearch, OpenSearch, Splunk, Datadog, and more!

Host and process metrics

Monitor system and process metrics from Linux, Windows, and macOS.

Highly performant

Process petabytes of data daily with very low resource utilization. Built for cloud native environments.

Enrich logs with metadata

Reduce troubleshooting efforts by enriching logs with K8s, AWS, Geo IP, Custom Lists, and more.

No downtime upgrades

Make code/configuration changes without stopping and restarting the application.

Convert logs to metrics

Extract metric data from your logs for easier analysis and monitoring.

Extensible plugins

Extend the power of Fluent Bit by writing plugins in WebAssembly (WASM), Golang, or Lua.

Fluent Bit Academy

Fluent Bit Academy is your destination for best practices and how-to’s on advanced processing, routing, and all things Fluent Bit. Learn about integrating Fluent Bit with OpenTelemetry, Windows, OpenSearch, and more! All available on demand.

Check out the offerings
Fluent Bit bird looking through OpenTelemetry telescope

Get involved

Fluent Bit is a CNCF (Cloud Native Computing Foundation) graduated project under the umbrella of Fluentd. We follow the CNCF Code of Conduct.


Whether you are a seasoned professional or just getting started in open source, there are ways that you can contribute.


Join over 11,000 other users in the Fluent Slack community to discuss all things FLuentd and Fluent Bit. Ask for help with an issue or provide guidance to others.


Join the bi-weekly community meetings hosted by Fluent Bit maintainers to discuss issues or just listen in.

Visit the CNCFCNCF Code of Conduct

A centralized telemetry pipeline for enterprises

Calyptia, from the creators of Fluent Bit

Founded by the creators and maintainers of Fluent Bit, Calyptia enables you to build turnkey, vendor-neutral telemetry data pipelines to seamlessly collect, transform, and route data to your Observability and SIEM backends. ​​Calyptia simplifies your infrastructure complexity while managing your pipelines and agents.

Learn more about Calyptia
Several screenshots of the prodcut

Calyptia is now a part of Chronosphere, the only cloud native observability solution that helps teams quickly resolve incidents before they impact the customer experience and the bottom line. Combined with the power of Calyptia, Chronosphere’s end-to-end observability platform helps teams rein in costs, improve developer productivity, and gain a competitive advantage. Calyptia and Chronosphere support the Fluent Bit community by employing multiple maintainers to devote their full attention to the project.

Learn about Chronosphere
Chronosphere + Calyptia