comparison
Fluent Bit vs Fluentd: How to choose the right tool for your log pipeline
Choosing between Fluent Bit and Fluentd is an architecture decision, not a product shootout. Both projects live under the CNCF Fluent umbrella and share a common lineage at Treasure Data, but they target different roles in a logging pipeline. Fluent Bit is a C-based telemetry agent designed for low-overhead collection at the edge. Fluentd is a Ruby-and-C data collector built for aggregation, transformation, and multi-destination routing.
The practical question is not which one is better — it’s where each one belongs in your stack, and whether you need both.