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Logging · head to head

Coralogix vs Fluentd

Coralogix logo

Coralogix

Logging

Continuous Log Insights and Visibility

From
Free
Rated
-
Full reviewWebsite
Fluentd logo

Fluentd

Logging

Open Source Data Collector for Unified Logging

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Coralogix no self-hosted option; cloud-only SaaS requiring use of customer's AWS, Azure, or GCP infrastructure; Fluentd fluentd needs more than 60 MB of memory at runtime, against roughly 450 KB for Fluent Bit
  • They diverge on capability: Coralogix covers Log aggregation, Fluentd covers Log collection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Coralogix and Fluentd actually diverge.

Attributes where Coralogix and Fluentd differ
AttributeCoralogixFluentd
Pricing modelusage-basedopen-source
PlatformsCloud-hosted (AWS, Azure, GCP)Web, Api
Founded20152011

Identical on both: starting price (Free), free tier (Yes), 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 Coralogix

  • Log aggregation
  • Machine learning analytics
  • Alerts
  • Distributed tracing

Only in Fluentd

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

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.

Coralogix

  • Enterprises requiring infinite log retention across logs, metrics, and tracesnot Fluentd
  • Organizations with cross-signal correlation needs (logs, metrics, traces unified)not Fluentd

Fluentd

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

Where each one falls short

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

Coralogix

  • No self-hosted option; cloud-only SaaS requiring use of customer's AWS, Azure, or GCP infrastructure
  • Pricing is purely usage-based per GB with no flat-rate subscription option; suitable for unpredictable workloads but no cost ceiling

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

Pricing, plan by plan

Coralogix

Free

No published plan breakdown. See the Coralogix review.

Fluentd

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

Which should you pick?

Choose Coralogix if

  • You need log aggregation.
  • You want to start without paying.
  • You work on Cloud-hosted (AWS, Azure, GCP).
  • You also want machine learning analytics.
Coralogix review

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

Questions people ask

Is Coralogix or Fluentd better?
Neither clearly leads. Coralogix starts at Free and Fluentd at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Coralogix or Fluentd?
Coralogix starts at Free and Fluentd at Free.
Does Coralogix or Fluentd run on more platforms?
Coralogix runs on Cloud-hosted (AWS, Azure, GCP). Fluentd runs on Web, Api.
Can I use Coralogix for free?
Both have a free tier, so you can try either at no cost before committing.
What is Coralogix best used for?
Coralogix is most often used for enterprises requiring infinite log retention across logs, metrics, and traces, organizations with cross-signal correlation needs (logs, metrics, traces unified). Of those, enterprises requiring infinite log retention across logs, metrics, and traces and organizations with cross-signal correlation needs (logs, metrics, traces unified) are not what Fluentd is typically brought in for.
What can Coralogix do that Fluentd cannot?
Coralogix covers Log aggregation, Machine learning analytics, Alerts, Distributed tracing. Fluentd covers Log collection, Data parsing, Filtering and buffering, Event routing. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Coralogix: How is Coralogix pricing structured and what are the per-unit costs?

Coralogix uses usage-based pricing with no tiered plans. All customers get identical feature access. Logs cost $0.42/GB, Traces cost $0.16/GB, Metrics cost $0.06/GB (1GB = 750 active time series), and AI costs $1.50 per 1M tokens.

Source
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
Coralogix: Is a free trial available and what does it include?

Yes, you can sign up for a free 14-day trial with no credit card required. The trial includes full feature access with a quota of 8 units.

Source
Coralogix: What features are included at all pricing levels and what happens if I exceed my quota?

All accounts include 24/7 real human support, unlimited data sources, unlimited users and hosts, unlimited team members, and enterprise features like RBAC, SSO, audit trails, and compliance controls. You can pay as-you-go to exceed your daily quota up to 2X.

Source
Coralogix: Do unused units roll over to the next billing period?

No, unused units or tokens expire at subscription term end with no rollover, refund, or credit options.

Source
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