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Logging · head to head

Rootly vs Fluent Bit

Rootly logo

Rootly

Logging

AI-native incident management with automation, on-call, and root cause analysis

From
$20/user-month
Rated
-
Full reviewWebsite
Fluent Bit logo

Fluent Bit

Logging

Fast and Lightweight Log Processor

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Fluent Bit has a free tier, so it costs nothing to try first.
  • Each has a real cost: Rootly pricing higher than some competitors for basic features; Fluent Bit fluent Bit ships over 100 built in plugins against more than 1,000 external plugins available for Fluentd, so fewer integrations exist out of the box
  • They diverge on capability: Rootly covers AI SRE automation, Fluent Bit covers Log collection.

Where they differ

Only the attributes on which Rootly and Fluent Bit actually diverge.

Attributes where Rootly and Fluent Bit differ
AttributeRootlyFluent Bit
Starting price$20/user-monthFree
Pricing modelsubscriptionopen-source
Free tierNoYes
PlatformsWeb, Mobile, Slack, Microsoft TeamsWeb, Api
Founded20202015

Identical on both: 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 Rootly

  • AI SRE automation
  • Alert routing
  • On-call management
  • Incident response
  • Call routing
  • AI meeting bot
  • Status pages

Only in Fluent Bit

  • Log collection
  • Lightweight processing
  • Data parsing
  • Event filtering
  • API
  • Webhooks
  • REST
  • Web support

What people use each for

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

Rootly

  • Automate on-call and incident response workflowsnot Fluent Bit
  • Run root cause analysis with AI assistancenot Fluent Bit
  • Track and improve Mean Time to Mitigation (MTTR)not Fluent Bit
  • Coordinate response across distributed teamsnot Fluent Bit
  • Learn from post-incident retrospectivesnot Fluent Bit

Fluent Bit

  • Lightweight log and metric forwarding from containers and edge devicesnot Rootly
  • Kubernetes node level log collection with a small memory footprintnot Rootly
  • Filtering and enriching telemetry before shipping it to a backendnot Rootly

Where each one falls short

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

Rootly

  • Pricing higher than some competitors for basic features
  • AI SRE features require separate contact-sales engagement
  • Learning curve for advanced automation features
  • Per-user pricing increases costs as team grows

Fluent Bit

  • Fluent Bit ships over 100 built in plugins against more than 1,000 external plugins available for Fluentd, so fewer integrations exist out of the box
  • It is written in C, so extending it beyond the built in plugins means writing C rather than Ruby
  • Dependencies are zero only until a plugin requires one

Pricing, plan by plan

Rootly

$20/user-month
  • Incident Response Essentials$20/user-month
    • Response with Slack integration
    • @Rootly AI Chat
    • AI Similar Incidents detection
  • Incident Response Enterprise$undefined/custom
    • All Essentials features
    • Custom forms and incident types
    • Private incidents
  • On-Call Essentials$20/user-month
    • Alert grouping and routing
    • Live call routing (1 phone number)
    • Schedules and escalation policies
  • On-Call Enterprise$undefined/custom
    • All Essentials features
    • 5 phone numbers for call routing
    • Unlimited schedules

Fluent Bit

Free
  • FreeFree
    • Log collection
    • Lightweight processing
    • Data parsing

Which should you pick?

Choose Rootly if

  • You need ai sre automation.
  • You work on Web, Mobile, Slack, Microsoft Teams.
  • You also want alert routing.
Rootly review

Choose Fluent Bit if

  • You need log collection.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want lightweight processing.
Fluent Bit review

Questions people ask

Is Rootly or Fluent Bit better?
Neither clearly leads. Rootly starts at $20/user-month and Fluent Bit at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Rootly or Fluent Bit?
Fluent Bit has a free tier; the other does not. Paid plans start at $20/user-month for Rootly and Free for Fluent Bit.
Does Rootly or Fluent Bit run on more platforms?
Rootly runs on Web, Mobile, Slack, Microsoft Teams. Fluent Bit runs on Web, Api.
Can I use Fluent Bit for free?
Yes. Fluent Bit has a free tier, so you can try it without paying. Rootly starts at $20/user-month.
What is Rootly best used for?
Rootly is most often used for automate on-call and incident response workflows, run root cause analysis with ai assistance, track and improve mean time to mitigation (mttr), coordinate response across distributed teams. Of those, automate on-call and incident response workflows and run root cause analysis with ai assistance are not what Fluent Bit is typically brought in for.
What can Rootly do that Fluent Bit cannot?
Rootly covers AI SRE automation, Alert routing, On-call management, Incident response. Fluent Bit covers Log collection, Lightweight processing, Data parsing, Event filtering.

Answered from the vendors’ own pages

Rootly: How much does Rootly cost?

Rootly charges $20/user/month for both Incident Response and On-Call Essentials plans. Enterprise plans require contacting sales. Startups under 100 employees with less than $50M raised get up to 50% discount.

Source
Fluent Bit: Is Fluent Bit free?

Yes, Fluent Bit is a CNCF graduated open-source project with no vendor lock-in and is freely available for download and use.

Source
Rootly: What is Rootly AI SRE?

AI SRE is an advanced feature that provides automated root cause analysis, alert correlation with system changes, impact analysis, and remediation suggestions. Pricing requires contact with sales.

Source
Fluent Bit: Does Fluent Bit offer an Enterprise option?

The website navigation mentions an Enterprise section suggesting paid offerings exist, but specific pricing and details are not provided on the publicly available pages.

Source
Rootly: Does Rootly integrate with Slack?

Yes, Rootly natively integrates with Slack for incident response workflows, allowing teams to manage incidents directly in Slack.

Source
Rootly: Are there discounts for small companies?

Yes, startups under 100 employees or less than 25 employees can get special pricing up to 50% discount. Contact Rootly sales for details.

Source
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