# Flagger vs Fleet

| Attribute | Flagger | Fleet |
|---|---|---|
| **Vioscale score** | 45.2 (28% (low)) | 46.2 (22% (low)) |
| activity.commits_last_30d | 10 | 81 |
| adoption.dependent_repos | 10 | 103 |
| adoption.github_stars | 5,395 | 1,724 |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | Infrastructure automation tool for Kubernetes that manages staged application releases using canary deployments, A/B testing, or blue-green strategies. It progressively shifts traffic to new versions while monitoring system health and running conformance tests to minimize production risk. | Fleet is a container management and deployment engine for Kubernetes clusters that uses GitOps to manage configurations from multiple sources including raw YAML, Helm charts, and Kustomize. It provides centralized control and monitoring across single clusters or large-scale distributed cluster deployments. |
| integrations.count | 12 | 5 |
| integrations.list | `[{"name":"Istio"},{"name":"Linkerd"},{"name":"Kuma"},{"name":"Knative"},{"name":"nginx"},{"name":"contour"},{"name":"gloo"},{"name":"traefik"},{"name":"skipper"},{"name":"Apache APISIX"},{"name":"Gateway API"},{"name":"Slack"}]` | `[{"name":"Git"},{"name":"Helm"},{"name":"Kustomize"},{"name":"Kubernetes"},{"name":"Rancher"}]` |
| language.primary | Go | Go |
| license.spdx | Apache-2.0 | Apache-2.0 |
| platform.support | - | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://flagger.app/","retrievedAt":"2026-08-19T23:31:50.668Z"}` | `{"type":"open_source","sourceUrl":"https://fleet.rancher.io/","retrievedAt":"2026-08-19T23:33:09.081Z"}` |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 50 | - |
| release.history | `[{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.44.0","date":"2026-07-21T04:41:29Z","type":"stable","version":"v1.44.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.43.0","date":"2026-04-21T13:24:06Z","type":"stable","version":"v1.43.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.42.0","date":"2025-10-16T14:03:00Z","type":"stable","version":"v1.42.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.41.0","date":"2025-04-02T11:48:30Z","type":"stable","version":"v1.41.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.40.0","date":"2024-12-17T09:46:38Z","type":"stable","version":"v1.40.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.39.0","date":"2024-11-26T12:09:01Z","type":"stable","version":"v1.39.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.38.0","date":"2024-07-30T13:43:09Z","type":"stable","version":"v1.38.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.37.0","date":"2024-03-26T13:45:13Z","type":"stable","version":"v1.37.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.36.1","date":"2024-03-06T08:16:31Z","type":"stable","version":"v1.36.1"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.36.0","date":"2024-02-07T19:45:09Z","type":"stable","version":"v1.36.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.35.0","date":"2023-11-30T15:39:59Z","type":"stable","version":"v1.35.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.34.0","date":"2023-10-04T10:30:29Z","type":"stable","version":"v1.34.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.33.0","date":"2023-08-29T14:56:35Z","type":"stable","version":"v1.33.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.32.0","date":"2023-07-14T10:29:23Z","type":"stable","version":"v1.32.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.31.0","date":"2023-05-10T17:08:04Z","type":"stable","version":"v1.31.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.30.0","date":"2023-04-12T15:26:22Z","type":"stable","version":"v1.30.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.29.0","date":"2023-02-21T09:01:45Z","type":"stable","version":"v1.29.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.28.0","date":"2023-01-26T12:25:17Z","type":"stable","version":"v1.28.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.27.0","date":"2022-12-16T10:17:42Z","type":"stable","version":"v1.27.0"},{"url":"https://github.com/fluxcd/flagger/releases/tag/v1.26.0","date":"2022-11-23T14:57:06Z","type":"stable","version":"v1.26.0"}]` | `[{"url":"https://github.com/rancher/fleet/releases/tag/v0.17.0-alpha.1","date":"2026-08-25T08:55:54Z","type":"prerelease","version":"v0.17.0-alpha.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.1","date":"2026-08-21T09:04:59Z","type":"stable","version":"v0.16.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.15.6","date":"2026-08-21T09:06:54Z","type":"stable","version":"v0.15.6"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.14.10","date":"2026-08-21T09:07:10Z","type":"stable","version":"v0.14.10"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.13.15","date":"2026-08-21T09:09:00Z","type":"stable","version":"v0.13.15"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.12.19","date":"2026-08-21T09:11:09Z","type":"stable","version":"v0.12.19"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.1-rc.2","date":"2026-08-20T11:16:49Z","type":"prerelease","version":"v0.16.1-rc.2"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.12.19-rc.2","date":"2026-08-20T04:24:24Z","type":"prerelease","version":"v0.12.19-rc.2"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.1-rc.1","date":"2026-08-19T11:19:46Z","type":"prerelease","version":"v0.16.1-rc.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.15.6-rc.1","date":"2026-08-19T11:27:56Z","type":"prerelease","version":"v0.15.6-rc.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.14.10-rc.2","date":"2026-08-19T13:20:54Z","type":"prerelease","version":"v0.14.10-rc.2"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.14.10-rc.1","date":"2026-08-19T11:26:35Z","type":"prerelease","version":"v0.14.10-rc.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.13.15-rc.2","date":"2026-08-19T12:48:45Z","type":"prerelease","version":"v0.13.15-rc.2"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.13.15-rc.1","date":"2026-08-19T11:26:59Z","type":"prerelease","version":"v0.13.15-rc.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.12.19-rc.1","date":"2026-08-19T12:26:31Z","type":"prerelease","version":"v0.12.19-rc.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.1-beta.2","date":"2026-08-06T11:41:11Z","type":"prerelease","version":"v0.16.1-beta.2"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.1-beta.1","date":"2026-08-04T09:59:06Z","type":"prerelease","version":"v0.16.1-beta.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.15.6-alpha.1","date":"2026-08-03T09:34:15Z","type":"prerelease","version":"v0.15.6-alpha.1"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.16.0","date":"2026-07-22T09:04:44Z","type":"stable","version":"v0.16.0"},{"url":"https://github.com/rancher/fleet/releases/tag/v0.15.5","date":"2026-07-22T09:05:34Z","type":"stable","version":"v0.15.5"}]` |
| security.scorecard | 8.8 | 6.4 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Ffluxcd%2Fflagger&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Francher%2Ffleet%2Fpkg%2Fapis&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Gitops)

| Capability | Flagger | Fleet |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | - | - |
| Pull based sync | - | - |
| Helm chart support | - | - |
| Kustomize support | - | - |
| Sops vault secrets decryption | - | - |
| Canary blue green rollouts | - | - |
| Multi cluster sync | - | - |
| UI dashboard included | - | - |
| Drift detection healing | - | - |
| SSO SAML RBAC | - | - |
| Cncf graduated incubating | - | - |
| SOC2 type ii | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T16:28:41.476Z. "-" = undocumented, not absent.*