> For the complete documentation index, see [llms.txt](https://docs.fluentbit.io/manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fluentbit.io/manual/1.2/undefined.md).

# Introduction

![](/files/-Lj3zbZa0w_M2XcBFXcx)

[Fluent Bit](http://fluentbit.io) is a Fast and Lightweight Log Processor and Forwarder for Linux, OSX and BSD family operating systems. It has been made with a strong focus on performance to allow the collection of events from different sources without complexity.

[Fluent Bit](http://fluentbit.io) is part of the [Fluentd](http://fluentd.org) project ecosystem, it's licensed under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0). This project is made and sponsored by [Treasure Data](https://www.treasuredata.com).


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