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Fluentd

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Open-source data collector for unified logging

Free, no paid tier
Free DevOps Log Management ETL & Data Pipelines
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Reviews on G2
15 reviews tracked

The Bottom Line

Price
Free, no paid tier. Compare plans

Key facts

  • Fluentd is an open-source data collector for unified logging infrastructure
  • It collects logs from multiple sources and routes them to various destinations
  • Completely free and open-source

Pros

  • Unified logging layer
  • Many plugins
  • CNCF project
  • Good Kubernetes support
  • Reliable

Cons

  • Ruby-based (resource use)
  • Plugin quality varies
  • Configuration learning curve
  • Debugging difficult
  • Some performance overhead

What is Fluentd?

Editorial review
Fluentd unifies logging infrastructure. Collect logs from anywhere, process them flexibly, send them anywhere-the log aggregation layer that connects sources to destinations. The plugin ecosystem is vast. The architecture handles scale. The community maintains broad compatibility. Operations teams building logging infrastructure often use Fluentd as the collection and routing layer.

Available on: Web

how we evaluate Source fluentd.org ↗

Ratings Across the Web

4.4 (15 reviews)

Fluentd holds an aggregate rating of 4.4 out of 5 from 15 reviews across G2, last checked August 31, 2026.

G2 15 reviews
4.4/5

Ratings aggregated from independent review platforms. Learn more

Key Features

  • Log collection
  • Unified logging
  • Plugins
  • Buffering
  • CNCF
  • Open source

Pricing Plans

Pricing checked Oct 3, 2026

Fluentd plans and prices, checked October 2026
PlanPriceDetails
Free Popular

$0

Open source

  • Unified logging
  • 500+ plugins
  • Reliable delivery
+1 more
  • CNCF project
View full pricing

Is Fluentd worth the price?

Great value

Fluentd's pricing is exceptionally generous as it is completely free and open-source.

This makes it an incredibly fair option compared to proprietary logging solutions. It's best for organizations of all sizes looking for a powerful, flexible, and cost-effective data collection solution.

Hidden Costs & Gotchas

Requires internal engineering resources for setup/maintenance.

Full Fluentd pricing: every plan, hidden costs and alternatives

Reviews

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4.4/5

Across 15 verified user reviews on G2

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

Fluentd vs Logstash Head-to-head: features, pricing, who wins Fluentd vs Vector Head-to-head: features, pricing, who wins Fluentd vs Fluent Bit Head-to-head: features, pricing, who wins

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Fluentd FAQ

How does Fluentd help with log management?

Fluentd unifies logging infrastructure by collecting logs from various sources, processing them flexibly, and then sending them to desired destinations. It acts as a log aggregation layer that connects different log sources to their ultimate storage or analysis points.

Which teams benefit most from using Fluentd?

Operations teams building logging infrastructure often use Fluentd as the collection and routing layer for their logs. It is particularly useful for organizations involved in DevOps, log management, and ETL & data pipelines.

How is Fluentd priced?

Fluentd is free to use, as it is an open-source data collector. There are no paid plans required to utilize its features for log aggregation and routing.

What kind of limitations should users be aware of with Fluentd?

Fluentd is Ruby-based, which can lead to higher resource usage compared to some alternatives. Users may also experience a configuration learning curve, and debugging issues can sometimes be difficult due to its complexity.

Can Fluentd integrate with various log sources and destinations?

Yes, Fluentd boasts a vast plugin ecosystem that allows it to collect logs from virtually anywhere and send them to a wide array of destinations. This broad compatibility is maintained by its active community.

How does Fluentd compare to Logstash?

Fluentd, like Logstash, serves as a unified logging layer for collecting and routing data. However, Fluentd is a CNCF project known for its good Kubernetes support and reliable performance, while Logstash is also a popular choice for log processing.

Does Fluentd offer good support for Kubernetes environments?

Yes, Fluentd provides good Kubernetes support, making it a suitable choice for collecting and managing logs within containerized environments. Its architecture is designed to handle scale, which is beneficial in dynamic Kubernetes clusters.

Source: fluentd.org

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