Deployed Over Fifteen Billion Times
An End to End Observability Pipeline
Fluent Bit is a super fast, lightweight, and highly scalable logging, metrics, and traces processor and forwarder. It is the preferred choice for cloud and containerized environments.
Latest stable release
v5.0.0 Released on March 24, 2026 Read the notes »
pipeline: inputs: - name: tail path: /var/log/system.log tag: app.logs processors: - name: opentelemetry_envelope - name: record_modifier record: service.name: checkout outputs: - name: opentelemetry match: * host: otel-gateway.monitoring.svc port: 4318 logs_uri: /v1/logs
OpenTelemetry
OpenTelemetry-native, built for real-world pipelines
Fluent Bit provides native OpenTelemetry support through OTLP ingestion and delivery, while operating efficiently across hybrid environments. As a high-performance data plane, it moves, processes, and routes telemetry data at scale across logs, metrics, and traces.
Built for practical routing, enrichment, and delivery across modern environments
- Native OTLP ingestion and delivery for modern telemetry pipelines
- Efficient routing across hybrid, cloud, and on-prem environments
- High-performance processing across logs, metrics, and traces
- Built-in enrichment, buffering, and stream processing capabilities
Trusted by some of the world’s largest and most complex organizations
Designed with performance in mind
A robust, lightweight, and portable architecture for high throughput with low CPU and memory usage from any data source to any destination.
Proven across distributed cloud and container environments. Highly available with I/O handlers to store data for disaster recovery.
> 1pb data throughput across thousands of sources and destinations daily
Granular management of data parsing and routing. Filtering and enrichment to optimize security and minimize cost.
> 1 Billion sources managed by Fluent Bit - from IoT Devices to Windows and Linux servers.
Lightweight, asynchronous design optimizes resource usage: CPU, memory, disk I/O, network. No more OOM errors!
~ 450kb minimal footprint maximizes asset support. Zero external dependencies.
Integration with all your technology - cloud native services, containers, streaming processors, and data backends.
80+ Plugins for inputs, filters, analytics tools and outputs.
Fluent Bit is a CNCF graduated project under the Fluent organization.
We are part of a large open source community. No vendor lock-in.
The Fluent Bit Advantage
Fluent Bit is purpose built for high scale data observability in any dynamic, distributed environment
Fully event driven design, leverages the operating system API for performance and reliability. All operations to collect and deliver data are asynchronous
Optimized data parsing and routing to improve security and reduce overall cost. Distribute data to multiple destinations with a zero copy strategy
Simple, granular controls enable detailed orchestration and management of data collection and transfer across your entire ecosystem
An abstracted I/O layer supports high-scale read/write operations and enables optimized data routing and support for stream processing
Removes challenges with handling TCP connections to upstream data sources. Simplifies connection process, manages timeout/network exceptions and Keepalived states
When delivering data to destinations, output connectors inherit full TLS capabilities in an abstracted way. Add your certificates as required.
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