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Fluent Bit vs Logstash: catalog facts
Fluent Bit	Logstash
Free Free and open source.	Free Free to download; Elastic sells paid subscriptions and hosted services for the wider…
Linux, Self-hosted	Self-hosted
Small footprint for an agent Native OpenTelemetry input and output	Ingests from many sources at the same time Grok parsing turns unstructured logs into fields
Only a pipeline; needs a separate backend to store and view data Configuration takes some learning	Designed around the Elastic Stack Server-side pipeline that needs configuration and upkeep
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 October 1, 2026

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