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Fluent Bit vs Fluentd: catalog facts
Fluent Bit	Fluentd
Free Free and open source.	Free Free and open source; commercial support is sold separately by other companies.
Linux, Self-hosted	Self-hosted
Small footprint for an agent Native OpenTelemetry input and output	More than 500 plugins for inputs and outputs Decouples log sources from storage backends
Only a pipeline; needs a separate backend to store and view data Configuration takes some learning	Aimed at server infrastructure rather than a single desktop Needs configuration and plugins chosen for each setup
Downloadable app, Self-hosted	Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.