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Software · head to head

Fluent Bit vs InfluxDB

Fluent Bit logo

Fluent Bit

Software

Fast and Lightweight Log Processor

From
Free
Rated
-
Full reviewWebsite
InfluxDB logo

InfluxDB

Software

Purpose-built time series database for metrics and events

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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; InfluxDB high-cardinality data causes memory pressure and performance degradation
  • They diverge on capability: Fluent Bit covers Log collection, InfluxDB covers Time-series Storage.

Where they differ

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

Attributes where Fluent Bit and InfluxDB differ
AttributeFluent BitInfluxDB
Pricing modelopen-sourceUnknown
PlatformsWeb, ApiCloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, Azure
Founded20152012

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

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 Fluent Bit

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

Only in InfluxDB

  • Time-series Storage
  • Flux Query Language
  • High Write Throughput
  • Data Compression
  • Retention Policies
  • Continuous Queries
  • Built-in Dashboards
  • Telegraf

Both cover

  • Web support

What people use each for

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

Fluent Bit

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

InfluxDB

  • Monitoringnot Fluent Bit
  • IoT datanot Fluent Bit
  • Financial datanot Fluent Bit
  • Log analyticsnot Fluent Bit
  • Observabilitynot Fluent Bit

Where each one falls short

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

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

InfluxDB

  • High-cardinality data causes memory pressure and performance degradation
  • No support for joins or transactions like relational databases
  • Queries limited to 72-hour window in InfluxDB 3 OSS Core
  • Clustering and authentication features absent from community version

Pricing, plan by plan

Fluent Bit

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

InfluxDB

Free
  • Cloud Serverless FreeFree
    • 5 MB writes per 5 minutes
    • 300 MB queries per 5 minutes
    • 30 day retention
  • Cloud Serverless Usage-Based$null/mo
    • 0.0025 USD per MB ingested
    • 0.012 USD per 100 queries
    • 0.002 USD per GB-hour storage

Which should you pick?

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

Choose InfluxDB if

  • You need time-series storage.
  • You want to start without paying.
  • You work on Cloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, Azure.
  • You also want flux query language.
InfluxDB review

Questions people ask

Is Fluent Bit or InfluxDB better?
Neither clearly leads. Fluent Bit starts at Free and InfluxDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fluent Bit or InfluxDB?
Fluent Bit starts at Free and InfluxDB at Free.
Does Fluent Bit or InfluxDB run on more platforms?
Fluent Bit runs on Web, Api. InfluxDB runs on Cloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, Azure.
Can I use Fluent Bit for free?
Both have a free tier, so you can try either at no cost before committing.
What is Fluent Bit best used for?
Fluent Bit is most often used for lightweight log and metric forwarding from containers and edge devices, kubernetes node level log collection with a small memory footprint, filtering and enriching telemetry before shipping it to a backend. Of those, lightweight log and metric forwarding from containers and edge devices and kubernetes node level log collection with a small memory footprint are not what InfluxDB is typically brought in for.
What can Fluent Bit do that InfluxDB cannot?
Fluent Bit covers Log collection, Lightweight processing, Data parsing, Event filtering. InfluxDB covers Time-series Storage, Flux Query Language, High Write Throughput, Data Compression. Both handle Web support.

Answered from the vendors’ own pages

InfluxDB: Is there a free tier and what are the limits?

InfluxDB 3 Core OSS is free forever for local development and prototyping. Cloud Serverless free tier includes 5 MB writes per 5 minutes, 300 MB queries per 5 minutes, 30 day retention, and 2 databases.

Source
InfluxDB: Can I self-host InfluxDB?

Yes, InfluxDB 3 Core is fully open source and can be self-hosted with no license required. InfluxDB 3 Enterprise is self-managed and includes a 30-day free trial.

Source
InfluxDB: What are the series cardinality limitations?

InfluxDB is sensitive to high-cardinality data. High cardinality increases RAM usage and can trigger out-of-memory errors, making it unsuitable for some workloads with many unique tag combinations.

Source
InfluxDB: Does InfluxDB support SQL queries?

InfluxDB has limited SQL support. Full SQL is available in InfluxDB 3, but earlier versions support only specific SQL commands and use InfluxQL as the primary query language.

Source
InfluxDB: Can I export my data from InfluxDB?

Yes, data can be exported from InfluxDB using query results. However, the process and supported formats depend on the version and deployment type you are using.

Source
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