Softwr

Logging · head to head

Fluentd vs Humio

Fluentd logo

Fluentd

Logging

Open Source Data Collector for Unified Logging

From
Free
Rated
-
Full reviewWebsite
Humio logo

Humio

Logging

Real-Time Log Analytics and Search

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Fluentd fluentd needs more than 60 MB of memory at runtime, against roughly 450 KB for Fluent Bit; Humio humio redirects to CrowdStrike Falcon LogScale product page, indicating product acquisition and rebranding without standalone pricing
  • They diverge on capability: Fluentd covers Log collection, Humio covers Real-time log streaming.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Fluentd and Humio actually diverge.

Attributes where Fluentd and Humio differ
AttributeFluentdHumio
Pricing modelopen-sourceusage-based
Founded20112015

Identical on both: starting price (Free), free tier (Yes), platforms (Web, Api), user rating (Not yet rated), category (Logging).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Fluentd

  • Log collection
  • Data parsing
  • Filtering and buffering
  • Event routing

Only in Humio

  • Real-time log streaming
  • Full-text search
  • Behavioral analytics
  • Threat detection

Both cover

  • API
  • Webhooks
  • REST
  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

Fluentd

  • Unified log collection and routing from many sources to many destinationsnot Humio
  • Parsing and transforming log records before forwardingnot Humio
  • Aggregating logs from containers into Elasticsearch, S3 or a SIEMnot Humio

Humio

  • Log aggregation and analysis for IT operationsnot Fluentd
  • Security monitoring and threat detectionnot Fluentd
  • Real-time data search and investigationnot Fluentd

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Fluentd

  • Fluentd needs more than 60 MB of memory at runtime, against roughly 450 KB for Fluent Bit
  • Fluentd is built as a Ruby gem and depends on other gems, so a Ruby runtime is required
  • Its capability comes from over 1,000 external plugins rather than built in functionality, so each added input or output is a separate dependency
  • The Fluent Bit documentation states that cloud providers have switched from Fluentd to Fluent Bit for performance and compatibility and calls Fluent Bit the next generation solution

Humio

  • Humio redirects to CrowdStrike Falcon LogScale product page, indicating product acquisition and rebranding without standalone pricing
  • No specific pricing amounts disclosed on CrowdStrike LogScale page; only billing model options mentioned without dollar figures
  • Flexible retention policies from 30 to 365+ days are available, requiring contact with sales for actual costs tied to retention selections

Pricing, plan by plan

Fluentd

Free
  • FreeFree
    • Log collection
    • Data parsing
    • Filtering and buffering

Humio

Free
  • FreeFree
    • Real-time log streaming
    • Full-text search
    • Behavioral analytics

Which should you pick?

Choose Fluentd if

  • You need log collection.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want data parsing.
Fluentd review

Choose Humio if

  • You need real-time log streaming.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want full-text search.
Humio review

Questions people ask

Is Fluentd or Humio better?
Neither clearly leads. Fluentd starts at Free and Humio at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fluentd or Humio?
Fluentd starts at Free and Humio at Free.
Does Fluentd or Humio run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Fluentd for free?
Both have a free tier, so you can try either at no cost before committing.
What is Fluentd best used for?
Fluentd is most often used for unified log collection and routing from many sources to many destinations, parsing and transforming log records before forwarding, aggregating logs from containers into elasticsearch, s3 or a siem. Of those, unified log collection and routing from many sources to many destinations and parsing and transforming log records before forwarding are not what Humio is typically brought in for.
What can Fluentd do that Humio cannot?
Fluentd covers Log collection, Data parsing, Filtering and buffering, Event routing. Humio covers Real-time log streaming, Full-text search, Behavioral analytics, Threat detection. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Fluentd: How much does Fluentd cost?

Fluentd is free and open-source under the Apache 2 License from the Cloud Native Computing Foundation (CNCF). There are no subscription fees, licensing costs, or commercial pricing tiers.

Source
Humio: What is Humio's pricing model?

Humio is now CrowdStrike Falcon LogScale with per endpoint per month or per endpoint per year billing options available, but specific pricing amounts are not published and require contact with sales.

Source
Humio: Does CrowdStrike Falcon LogScale (formerly Humio) offer a free trial?

A 15-day free trial is offered for CrowdStrike Falcon LogScale at https://www.crowdstrike.com/en-us/products/trials/try-falcon-next-gen-siem/, but specific trial terms require review.

Source
Humio: What data retention license options are available for CrowdStrike Falcon LogScale?

Flexible retention policies include licenses for 30, 60, 90, 180, and 365 days of retention, with additional retention options available upon request.

Source
Share

Related pages

More on Fluentd

More on Humio

Keep looking

Other head to heads