Alternatives to Fluent Bit
Lightweight agent that collects, processes and forwards logs, metrics and traces. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Fluent Bit
Lightweight agent that collects, processes and forwards logs, metrics and traces.
Replacements
Listings that take over the same core job as Fluent Bit.
Fluentd
An open-source data collector that gathers logs from many sources and routes them to storage backends.
Fluentd is the larger sibling collector with more than 500 plugins for routing logs, focused on logs rather than a small-footprint agent for all telemetry.
Grafana Alloy
An open-source telemetry collector from Grafana Labs that gathers and forwards logs, metrics and traces.
Grafana Alloy is Grafana Labs' collector for logs, metrics and traces, fitting directly into a Loki and Grafana stack as the Promtail replacement.
OpenTelemetry Collector
Receive, process and export telemetry through a vendor-neutral collector.
OpenTelemetry Collector is a vendor-neutral Apache-2.0 collector that receives, processes and exports traces, metrics and logs, and also runs on Windows and macOS.
Telegraf
Collect and forward metrics using a configurable server agent.
Telegraf is an MIT-licensed agent with many input and output plugins, centred on collecting and forwarding metrics rather than logs and traces.
Similar software
Related functionality, not a direct replacement.
Grafana Loki
Collect and query application logs using label-based indexing.
VictoriaLogs
Store and search logs with a dedicated log-management server.
Elastic Stack
Elasticsearch, Logstash, Beats and Kibana combined for collecting, searching and visualizing logs and other data.
OpenObserve
Collect logs, metrics and traces in a unified observability application.
Prometheus Node Exporter
A small agent that exposes hardware and operating system metrics from Linux and Unix machines to Prometheus.
