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Grafana Alloy vs Fluent Bit: catalog facts
Grafana Alloy	Fluent Bit
Free Free and open source from Grafana Labs.	Free Free and open source.
Self-hosted	Linux, Self-hosted
One collector for logs and other telemetry Replacement for the retired Promtail	Small footprint for an agent Native OpenTelemetry input and output
Only a collector; needs Loki, Grafana or another backend to be useful Configuration takes time to learn	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 September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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