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Fluentd

Free#14 of 109 in Log Management SoftwareTelemetry Pipeline Software

Fluentd: A mature, flexible log pipeline component for teams managing their own infrastructure. Ranked #14 of 109 in Log Management Software by our editors (8.1/10); pricing: Open source; best for engineers building self-hosted log pipelines.

8.1/10Editor score
Visit Fluentd
Fluentd8.1 Visit Fluentd

At a glance

  • Editor score
    8.1 / 10
  • Pricing
    Open source
  • Best for
    Engineers building self-hosted log pipelines
  • Paid from
    Free
  • Founded
    2011
  • Facts checked
    20 Sep 2026
Fluentd screenshot

  • Where it wins

    • Broad inputs, parsers, filters, routing, and output plugins
    • File and memory buffering supports controlled event delivery
    • Runs on Windows, macOS, Linux, and self-hosted deployments

  • Where it doesn't

    • Requires self-hosted deployment and operational ownership
    • Does not provide a complete search and dashboard experience
    • Alerting is outside its core pipeline function

Our verdict on Fluentd

Fluentd is an open-source data collector for engineers building self-hosted log pipelines. It brings collection, parsing, filtering, buffering, routing, and delivery into a pluggable pipeline that can handle files, network events, structured records, and unstructured logs. The project supports Windows, macOS, Linux, and self-hosted deployment, making it suitable for teams that want to control where log processing runs and how records move between sources and destinations.

Its main strength is breadth within the pipeline layer. Fluentd can tail files with rotation and position tracking, accept HTTP, TCP, UDP, syslog, forward, and Windows Event Log inputs, and parse formats including JSON, regexp, Apache, Nginx, syslog, CSV, TSV, LTSV, and multiline records. Field-based filtering and record transformation help shape events before delivery, while plugin-based routing can send data to multiple destinations. Memory and file-based buffering add options for handling delivery conditions, and Amazon S3 output supports time-sliced files and compression options. Custom plugins extend the system with additional parsers, filters, inputs, and outputs.

Fluentd is a focused infrastructure component rather than a complete log-management workspace. It does not present itself as a combined search, dashboard, and alerting platform, so teams seeking those functions should pair it with other systems or choose a broader alternative. The self-hosted model also places deployment, configuration, plugin selection, and ongoing operations with the adopting team. Choose Fluentd when flexible collection and routing are the priority, especially across varied environments and formats. Look elsewhere when the requirement is a hosted experience centered on ready-made investigation, visualization, and alerting.

Your product? Our editors can test Fluentd in depth and publish a review, labelled as paid · from $149/mo →

Fluentd pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on fluentd.org

Fluentd fact sheet

Free planNot verified
Paid fromFree
Included ingestionNot verified
Log retentionNot verified
Log pipelinesYes
Archive exportYes
Live log tailingYes
Deployment optionsSelf-hosted
Structured log parsingYes
DeploymentSelf-hosted
PlatformsWindows, macOS, Linux
SupportCommunity, Docs
Built forSmall business, Mid-market, Enterprise (editorial estimate)
PricingOpen source
Websitefluentd.org
Facts checked20 Sep 2026

Alternatives to Fluentd

See all Fluentd alternatives →

Also Ranked In

Fluentd is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — Fluentd 8.1/10

Fluentd is listed in our Log Management Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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