Fluent Bit is an open source telemetry agent that processes logs, metrics, traces, and profiles. It's designed to efficiently handle the challenges of collecting and processing telemetry data across a wide range of environments, from constrained systems to complex cloud infrastructures. Managing telemetry data from various sources and formats can be a constant challenge, particularly when performance is a critical factor.
Rather than serving as a drop-in replacement, Fluent Bit enhances the observability strategy for your infrastructure. It adapts and optimizes your existing logging layer, and adds metrics and traces processing. Fluent Bit supports a vendor-neutral approach, with native OpenTelemetry (OTLP) ingestion and delivery and seamless integration with ecosystems such as Prometheus. Trusted by major cloud providers, banks, and companies that need a ready-to-use telemetry agent, Fluent Bit effectively manages diverse data sources and formats. It maintains optimal performance while keeping resource consumption low.
Fluent Bit can be deployed as an edge agent for localized telemetry data handling or utilized as a central aggregator/collector for managing telemetry data across multiple sources and environments.
Publisher’s description
What is fluent-bit?
fluent-bit is an open-source firewall & privacy program for Windows from Chronosphere Inc.. It ranks 22nd by popularity among firewall & privacy in this catalogue. It is written in C.
Installation and requirements
Official installers exist for 64-bit, ARM64 and 32-bit as EXE (NSIS) and Portable. The main installer is 22.9 MB. The installer supports unattended (silent) installation.
Updates and version history
The current version is 5.1.5, released on October 21, 2026. 5 versions are listed since June 6, 2026, each with links to its own installer files. The last update is less than a month old.
Popularity and file types
The Chocolatey package has been downloaded 486 times. The source code on GitHub (fluent/fluent-bit) has 8,163 stars. Similar programs include OnionShare, Portmaster and dnscrypt-proxy.
Project description on GitHub: “Fast and Lightweight Logs, Metrics and Traces processor for Linux, BSD, OSX and Windows”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Updated in the last two months
- Large user base
In short: fluent-bit is an open-source firewall & privacy tool for 64-bit, ARM64 and 32-bit PCs. Administrators can deploy it unattended.
Is fluent-bit safe to download?
- The file is served by packages.fluentbit.io, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
CCE1D2F5A340E42072C3873157A60FCD853431F25DA4430A6713B99F7B2C2272· Open the VirusTotal report for this hash - The link answered when we last checked it (October 26, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Security practices (OpenSSF Scorecard)
Automated checks of the fluent/fluent-bit repository on GitHub by the Open Source Security Foundation, last run on October 24, 2026.
- Actively maintained10
- Security policy10
- Dependency update tool10
- No dangerous workflows10
- Fuzzing10
- Licence declared10
- Static code analysis10
- Published packages10
- Tests in CI10
- Contributors from several organisations10
- Code review5
- Pinned dependencies3
- OpenSSF Best Practices badge2
- Branch protection1
- Restricted token permissions0
- No binaries in the repository0
- Signed releases0
- No known vulnerabilities0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 5 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 5.1.5Latest | October 21, 2026 | 39.9 MB | 32-bit ZIP64-bit EXE (NSIS)64-bit ZIPARM64 EXE (NSIS) |
| 5.1.3 | October 1, 2026 | 39.8 MB | 64-bit ZIPARM64 ZIP64-bit EXE (NSIS)32-bit EXE (NSIS) |
| 5.1.1 | August 16, 2026 | 39.1 MB | 64-bit EXE (NSIS)64-bit ZIP32-bit ZIPARM64 ZIP |
| 5.1.0 | August 6, 2026 | 38.9 MB | ARM64 EXE (NSIS)32-bit ZIP32-bit EXE (NSIS)ARM64 ZIP |
| 5.0.7 | June 6, 2026 | 37.9 MB | 64-bit ZIP32-bit ZIP64-bit EXE (NSIS)32-bit EXE (NSIS) |
Release cycle and support
Version 5.1.5 belongs to the 5.1 release line, still supported, with no end date announced.
| Release line | Released | Support ends | Latest version | Status |
|---|---|---|---|---|
| 5.1 | August 6, 2026 | not announced | 5.1.5 | Supported |
| 5.0 | March 31, 2026 | November 6, 2026 | 5.0.11 | Supported |
| 4.2 | November 11, 2025 | June 30, 2026 | 4.2.8 | End of life |
| 4.1 | September 24, 2025 | February 11, 2026 | 4.1.2 | End of life |
| 4.0 | March 29, 2025 | December 24, 2025 | 4.0.14 | End of life |
| 3.2 | November 12, 2024 | June 29, 2025 | 3.2.10 | End of life |
| 3.1 | July 8, 2024 | February 12, 2025 | 3.1.10 | End of life |
| 3.0 | March 21, 2024 | October 8, 2024 | 3.0.7 | End of life |
Install from the command line
Silent install ›winget install --id Chronosphere.FluentBit -echoco install fluent-bit -yfluent-bit-5.1.5-win64.exe /SProgram files (.exe): fluent-bit.exe
Related guide: How to use winget: install and update apps
Also for other systems
brew install fluent-bitInformation
- Publisher
- Chronosphere Inc.
- Category
- Firewall & privacy
- Licence
- Apache-2.0
- Price
- Free
- Source code
- github.com/fluent/fluent-bit
- Written in
- C
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- EXE (NSIS), Portable
- Version
- 5.1.5
- Released
- October 21, 2026
- Added to the catalogue
- July 6, 2026
- Versions listed
- 5
- Chocolatey downloads
- 486
- GitHub stars
- 8,163
- GitHub forks
- 2,017
- Website
- docs.fluentbit.io
- winget ID
- Chronosphere.FluentBit
- Chocolatey package
- fluent-bit
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is fluent-bit free?
Yes. fluent-bit is open-source software under the Apache-2.0 licence.
Is fluent-bit safe to download?
The download comes from packages.fluentbit.io, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install fluent-bit with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can fluent-bit be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does fluent-bit run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of fluent-bit?
The versions page lists all 5 versions with links to their official installer files, back to June 6, 2026.
What are alternatives to fluent-bit?
OnionShare, Portmaster, dnscrypt-proxy, Prey Anti-Theft and WindowsSpyBlocker. The alternatives page compares them.
