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Logging · head to head

Bugsnag vs Fluentd

Bugsnag logo

Bugsnag

Logging

Application Stability Monitoring

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: Bugsnag owned by SmartBear rather than being independent; Fluentd fluentd needs more than 60 MB of memory at runtime, against roughly 450 KB for Fluent Bit
  • They diverge on capability: Bugsnag covers Error tracking, Fluentd covers Log collection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Bugsnag and Fluentd actually diverge.

Attributes where Bugsnag and Fluentd differ
AttributeBugsnagFluentd
Pricing modelfreemiumopen-source
Founded20122011

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 Bugsnag

  • Error tracking
  • Crash reporting
  • Release tracking
  • Trend analysis

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.

Bugsnag

  • Crash and error reporting for mobile and web applicationsnot Fluentd
  • Stability scores per releasenot Fluentd
  • Grouping errors by root cause across deploysnot Fluentd
  • Alerting when a release regressesnot Fluentd

Fluentd

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

Where each one falls short

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

Bugsnag

  • Owned by SmartBear rather than being independent
  • The free tier covers 7,500 events a month
  • Paid tiers are usage-priced by event volume rather than by seat, so a noisy release raises the bill
  • Enterprise pricing is quote-only

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

Bugsnag

Free
  • FreeFree
    • 1 user
    • Error and performance monitoring
    • 7500 events monthly
  • SelectFree
    • 50000-3 million error monitoring events monthly tiered
    • 1-150 million performance monitoring spans
    • Unlimited users
  • PreferredFree
    • 100000-3 million error monitoring events tiered
    • 1-300 million performance monitoring spans
    • Automatic error prioritization
  • Enterprise$null/month
    • Custom pricing
    • All Preferred features plus
    • Automatic error assignment

Fluentd

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

Which should you pick?

Choose Bugsnag if

  • You need error tracking.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want crash reporting.
Bugsnag 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 Bugsnag or Fluentd better?
Neither clearly leads. Bugsnag 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, Bugsnag or Fluentd?
Bugsnag starts at Free and Fluentd at Free.
Does Bugsnag or Fluentd run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Bugsnag for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bugsnag best used for?
Bugsnag is most often used for crash and error reporting for mobile and web applications, stability scores per release, grouping errors by root cause across deploys, alerting when a release regresses. Of those, crash and error reporting for mobile and web applications and stability scores per release are not what Fluentd is typically brought in for.
What can Bugsnag do that Fluentd cannot?
Bugsnag covers Error tracking, Crash reporting, Release tracking, Trend analysis. Fluentd covers Log collection, Data parsing, Filtering and buffering, Event routing. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Bugsnag: Is BugSnag free?

BugSnag Free plan is free and includes 1 user, error and performance monitoring with 7500 events and 1 million spans monthly, 50+ platforms, 30+ integrations, and 7-day data retention for solo developers and passion projects.

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
Bugsnag: What are the event and span limits by BugSnag plan?

Free plan: 7500 error events and 1 million spans monthly. Select plan: 50000-3 million error events and 1-150 million spans tiered. Preferred plan: 100000-3 million error events and 1-300 million spans tiered. Enterprise plan: custom limits with pricing on request.

Source
Bugsnag: How long does BugSnag retain error data?

BugSnag Free plan retains data for 7 days. Select and Preferred paid plans retain error data for 60 days. Enterprise plans offer custom data retention periods negotiated with sales.

Source
Bugsnag: What features does BugSnag Preferred plan add?

BugSnag Preferred plan (pricing tiered by volume, not published) adds automatic error prioritization, stability benchmarks, advanced segmentation, custom notifications, SAML SSO, and system metrics monitoring compared to Select plan.

Source
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