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Logstash vs Fluent Bit: catalog facts
Logstash	Fluent Bit
Free Free to download; Elastic sells paid subscriptions and hosted services for the wider…	Free Free and open source.
Self-hosted	Linux, Self-hosted
Ingests from many sources at the same time Grok parsing turns unstructured logs into fields	Small footprint for an agent Native OpenTelemetry input and output
Designed around the Elastic Stack Server-side pipeline that needs configuration and upkeep	Only a pipeline; needs a separate backend to store and view data Configuration takes some learning
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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