# Fluent Bit vs Fluentd

**Leader by vioscaleAI score:** Fluentd

| Attribute | Fluent Bit | Fluentd |
|---|---|---|
| **vioscaleAI score** | 51.1 (54% (medium)) | 57 (54% (medium)) |
| activity.commits_last_30d | 100 | 29 |
| adoption.dependent_repos | 1 | 3,044 |
| adoption.github_stars | 8,155 | 13,607 |
| content.faq | `[{"answer":"Collects and routes telemetry data from distributed systems with high efficiency and built-in support for the OpenTelemetry standard. It is indexed under Log Management Software.","source":"https://fluentbit.io/","question":"What is Fluent Bit?","confidence":0.6},{"answer":"Fluent Bit is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://fluentbit.io/","question":"Is Fluent Bit free to use?","confidence":0.6},{"answer":"Fluent Bit supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://fluentbit.io/","question":"What platforms does Fluent Bit support?","confidence":0.6},{"answer":"Yes. Fluent Bit can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://fluentbit.io/","question":"Can Fluent Bit be self-hosted?","confidence":0.6},{"answer":"We have confirmed 12 integrations for Fluent Bit, including AWS S3, Google Cloud Storage, Kubernetes, OpenTelemetry, Syslog, Prometheus, Windows Event Log and Podman, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://fluentbit.io/","question":"What does Fluent Bit integrate with?","confidence":0.6},{"answer":"Yes. Fluent Bit is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/fluent/fluent-bit","question":"Is Fluent Bit open source?","confidence":0.95}]` | `[{"answer":"Fluentd is an open source data collector that consolidates logs and events from multiple applications and systems into a unified pipeline, enabling better data routing, processing, and consumption across your infrastructure. It is indexed under Log Management Software.","source":"https://www.fluentd.org/","question":"What is Fluentd?","confidence":0.6},{"answer":"Fluentd is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://www.fluentd.org/","question":"Is Fluentd free to use?","confidence":0.6},{"answer":"Fluentd supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.fluentd.org/","question":"What platforms does Fluentd support?","confidence":0.6},{"answer":"Yes. Fluentd can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.fluentd.org/","question":"Can Fluentd be self-hosted?","confidence":0.6},{"answer":"Yes. Fluentd is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/fluent/fluentd","question":"Is Fluentd open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A fast, lightweight data pipeline tool that processes and forwards logs, metrics, and traces with native OpenTelemetry support, optimized for cloud and containerized deployments. | Collects event data from various sources and forwards it to multiple destinations including databases, cloud services, and data platforms. Designed to centralize log infrastructure across applications and systems. |
| features.capabilities | `{"hosting":"both","log_role":"shipper","otel_support":"native","query_language":"SQL","structured_parsing":true}` | `{"hosting":"self","log_role":"shipper","structured_parsing":true}` |
| integrations.count | 70 | 500 |
| integrations.list | `[{"name":"AWS S3"},{"name":"Google Cloud Storage"},{"name":"Kubernetes"},{"name":"OpenTelemetry"},{"name":"Syslog"},{"name":"Prometheus"},{"name":"Windows Event Log"},{"name":"Podman"},{"name":"NVIDIA GPU"},{"name":"HTTP"},{"name":"Google Chronicle"},{"name":"Fluent Forward"},{"name":"AWS CloudWatch Logs","native":true,"direction":"outbound"},{"name":"Slack","native":true},{"name":"Elasticsearch","native":true,"direction":"outbound"},{"name":"ArvanCloud CloudLogs","native":true,"direction":"outbound"}]` | - |
| language.primary | C | Ruby |
| license.spdx | Apache-2.0 | Apache-2.0 |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://fluentbit.io/","retrievedAt":"2026-09-14T13:26:57.718Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://www.fluentd.org/","retrievedAt":"2026-08-14T11:05:37.414Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 8 | 70 |
| release.history | `[{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.11","date":"2026-10-09T15:54:41Z","type":"stable","version":"v5.0.11"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.1.3","date":"2026-10-01T05:43:03Z","type":"stable","version":"v5.1.3"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.1.2","date":"2026-09-05T03:54:50Z","type":"stable","version":"v5.1.2"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.10","date":"2026-09-04T03:46:41Z","type":"stable","version":"v5.0.10"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.1.1","date":"2026-08-16T04:40:56Z","type":"stable","version":"v5.1.1"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.1.0","date":"2026-08-06T02:29:07Z","type":"stable","version":"v5.1.0"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v4.2.8","date":"2026-08-04T05:56:56Z","type":"stable","version":"v4.2.8"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v4.2.7","date":"2026-07-09T08:29:44Z","type":"stable","version":"v4.2.7"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.9","date":"2026-07-04T16:00:11Z","type":"stable","version":"v5.0.9"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v4.2.6","date":"2026-06-26T05:43:32Z","type":"stable","version":"v4.2.6"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.8","date":"2026-06-24T15:05:57Z","type":"stable","version":"v5.0.8"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.7","date":"2026-06-06T04:22:23Z","type":"stable","version":"v5.0.7"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v4.2.5","date":"2026-06-03T06:04:25Z","type":"stable","version":"v4.2.5"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.6","date":"2026-05-21T23:19:01Z","type":"stable","version":"v5.0.6"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.5","date":"2026-05-07T19:53:24Z","type":"stable","version":"v5.0.5"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.4","date":"2026-05-01T18:06:29Z","type":"stable","version":"v5.0.4"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.3","date":"2026-04-14T21:13:53Z","type":"stable","version":"v5.0.3"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v4.2.4","date":"2026-04-10T07:57:40Z","type":"stable","version":"v4.2.4"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.2","date":"2026-04-01T18:54:40Z","type":"stable","version":"v5.0.2"},{"url":"https://github.com/fluent/fluent-bit/releases/tag/v5.0.1","date":"2026-03-31T03:52:57Z","type":"stable","version":"v5.0.1"}]` | `[{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.4","date":"2026-09-28T05:54:15Z","type":"stable","version":"v1.19.4"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.3","date":"2026-06-25T09:16:05Z","type":"stable","version":"v1.19.3"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.2","date":"2026-02-19T04:41:23Z","type":"stable","version":"v1.19.2"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.11","date":"2025-12-10T04:43:59Z","type":"stable","version":"v1.16.11"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.1","date":"2025-11-10T02:13:37Z","type":"stable","version":"v1.19.1"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.10","date":"2025-09-12T01:52:17Z","type":"stable","version":"v1.16.10"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.0","date":"2025-07-30T07:31:21Z","type":"stable","version":"v1.19.0"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.9","date":"2025-05-14T08:02:54Z","type":"stable","version":"v1.16.9"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.8","date":"2025-05-01T05:44:23Z","type":"stable","version":"v1.16.8"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.7","date":"2025-01-30T01:44:35Z","type":"stable","version":"v1.16.7"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.18.0","date":"2024-11-29T05:30:48Z","type":"stable","version":"v1.18.0"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.6","date":"2024-08-20T08:09:25Z","type":"stable","version":"v1.16.6"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.17.1","date":"2024-08-20T01:34:50Z","type":"stable","version":"v1.17.1"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.17.0","date":"2024-04-30T09:14:06Z","type":"stable","version":"v1.17.0"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.5","date":"2024-03-27T09:07:47Z","type":"stable","version":"v1.16.5"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.4","date":"2024-03-14T08:12:40Z","type":"stable","version":"v1.16.4"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.3","date":"2023-11-14T05:23:28Z","type":"stable","version":"v1.16.3"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.2","date":"2023-07-14T08:27:02Z","type":"stable","version":"v1.16.2"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.1","date":"2023-04-17T07:51:15Z","type":"stable","version":"v1.16.1"},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.16.0","date":"2023-03-29T04:04:47Z","type":"stable","version":"v1.16.0"}]` |
| security.certifications | - | `[{"name":"Third-party security audit","status":"active","auditor":"Cure53"}]` |
| security.scorecard | 5.7 | 8.6 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=homebrew&package_name=fluent-bit&per_page=100","last_12m":0,"max_severity":null}` | `{"count":7,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=rubygems&package_name=fluentd&per_page=100","last_12m":4,"max_severity":"CRITICAL"}` |

## Capabilities (Log Management Software)

| Capability | Fluent Bit | Fluentd |
|---|:--:|:--:|
| **Core** |  |  |
| Pipeline role | Shipper | Shipper |
| **Search** |  |  |
| Full-text log search | - | - |
| Live tail / stream | - | - |
| **Processing** |  |  |
| Structured parsing | ✓ | ✓ |
| PII redaction at ingest | - | - |
| **Ops** |  |  |
| Log-based alerting | - | - |
| Dashboards / visualisation | - | - |
| **Storage** |  |  |
| Retention tiering | - | - |
| Object-store columnar backend | - | - |
| **Interop** |  |  |
| OpenTelemetry logs | Native | - |
| Query language | SQL | - |
| **Deployment** |  |  |
| Hosting | Cloud + self-hosted | Self-hosted only |

*Source: vioscaleAI. Generated 2026-10-16T20:46:09.661Z. "-" = undocumented, not absent.*