Comparison

Fluentd vs Splunk

On the evidence we track, Fluentd leads this comparison with a composite score of 57/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★Fluentd57
Splunk51
Score
vioscaleAI score
Fluentd57 / 100medium · 54%
Splunk51 / 100low · 41%
Pricing
Free tier
Fluentd✓
Splunk✗
Model
Price level
Fluentdfree
Splunkunknown
Transparent
Fluentd–
Splunk✗
Integrations
Count
Fluentd500
Splunk2,000
Reliability
Status page
Fluentd–
Splunk✓
Adoption
Dependent repos
Fluentd3,044
Splunk–
Github stars
Fluentd13,607
Splunk–
Activity
Commits last 30d
Fluentd29
Splunk–
Release
Cadence days
Fluentd70
Splunk–
History
Fluentd20 items
Splunk–
License
Spdx
FluentdApache-2.0
Splunk–
Language
Primary
FluentdRuby
Splunk–
Market
Availability
Fluentd–
Content
Faq
Fluentd5 items
Splunk5 items

Capabilities

Feature-by-feature on the axes that matter for log management software. “-” means undocumented, not absent.

Core
Pipeline role
FluentdShipper
SplunkEnd-to-end platform
Search
Full-text log search
Fluentd-
Splunk✓
Live tail / stream
Fluentd-
Splunk-
Processing
Structured parsing
Fluentd✓
Splunk✓
PII redaction at ingest
Fluentd-
Splunk✓
Ops
Log-based alerting
Fluentd-
Splunk✓
Dashboards / visualisation
Fluentd-
Splunk✓
Storage
Retention tiering
Fluentd-
Splunk✓
Object-store columnar backend
Fluentd-
Splunk-
Interop
OpenTelemetry logs
Fluentd-
SplunkNative
Query language
Fluentd-
Splunk-
Deployment
Hosting
FluentdSelf-hosted only
SplunkCloud + self-hosted

What each one is

The product in its own terms, so the numbers below have context.

Fluentd

Leader

Collects event data from various sources and forwards it to multiple destinations including databases, cloud services, and data platforms. Designed to centralize log infrastructure across applications and systems.

Independently observed

Splunk

Splunk consolidates data from various sources and enables real-time analysis for security monitoring, system observability, and AI applications. It supports analyzing data in place across different storage backends, reducing costs and data movement while providing complete operational visibility.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Fluentd

Leader
Open sourceFree tier
as of verify ↗

Splunk

Usage-based14-day trial

Activity-based, ingest, workload, and entity pricing models. Free 14-day trial.

as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Fluentd✗
Splunk✓
macOS
Fluentd✓
Splunk✗
Windows
Fluentd✓
Splunk✗
Linux
Fluentd✓
Splunk✗
CLI
Fluentd✓
Splunk✗
Deployment
Cloud / SaaS
Fluentd✗
Splunk✓
Self-hosted
Fluentd✓
Splunk✓
Hybrid
Fluentd✗
Splunk✓
Air-gapped
Fluentd✗
Splunk✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Fluentd

Leader

Not documented yet.

Splunk

16 total
  • OpenTelemetry
  • Cisco Talos
  • AWS
  • Amazon CloudWatch
  • Datadog
  • Google Stackdriver
  • Grafana
  • Honeybadger
  • Loadster
  • New Relic
  • Observium
  • Opsview
  • Pingdom
  • Slack
  • Amazon S3
  • Cisco Cloud Connect
Independently observed
Still deciding?

Fluentd or Splunk: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.