# Bazel vs Flux CD

**Leader by Vioscale score:** Bazel

| Attribute | Bazel | Flux CD |
|---|---|---|
| **Vioscale score** | 65.3 (42% (low)) | 55.5 (49% (low)) |
| activity.commits_last_30d | 100 | 10 |
| adoption.dependent_repos | 3 | 10 |
| adoption.github_stars | 25,762 | 5,395 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | An open-source build and test system designed to efficiently compile and test projects written in multiple programming languages while supporting builds for different target platforms. It uses intelligent caching and parallel execution to speed up builds and scales to handle large codebases across multiple repositories. | Continuous delivery solution for Kubernetes that enables GitOps workflows through automatic reconciliation from Git. A CNCF Graduated project. |
| features.capabilities | `{"caching":true,"hosting":"self","marketplace":true,"matrix_builds":true,"self_hosted_runners":true}` | `{"hosting":"both","yaml_pipelines":true,"container_native":true,"secrets_management":true,"deploy_environments":true,"self_hosted_runners":true}` |
| integrations.count | - | 25 |
| integrations.list | - | `[{"name":"GitHub"},{"name":"GitLab"},{"name":"Bitbucket"},{"name":"AWS S3"},{"name":"AWS EKS"},{"name":"AWS KMS"},{"name":"Azure"},{"name":"Azure Key Vault"},{"name":"Azure AKS"},{"name":"Azure DevOps"},{"name":"Azure Event Hubs"},{"name":"Google Cloud Artifact Registry"},{"name":"Google Cloud Storage"},{"name":"Google Cloud Key Management Service"},{"name":"Google Kubernetes Engine"},{"name":"Google Cloud Pub/Sub"},{"name":"Slack"},{"name":"Google Chat"},{"name":"Kustomize"},{"name":"Helm"},{"name":"Harbor"},{"name":"Flagger"},{"name":"OCI"},{"name":"SOPS"},{"name":"Cluster API"}]` |
| language.primary | Java | Go |
| license.spdx | Apache-2.0 | Apache-2.0 |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://bazel.build/","retrievedAt":"2026-08-13T23:02:29.441Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://fluxcd.io","retrievedAt":"2026-08-13T18:19:06.825Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 5 | 50 |
| release.history | `[{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.0rc3","date":"2026-08-25T22:48:54Z","type":"prerelease","version":"8.8.0rc3"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.0rc2","date":"2026-08-18T21:22:09Z","type":"prerelease","version":"8.8.0rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.0rc1","date":"2026-08-06T23:58:18Z","type":"prerelease","version":"8.8.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.2.0","date":"2026-07-13T20:39:01Z","type":"stable","version":"9.2.0"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.2.0rc2","date":"2026-07-09T20:29:30Z","type":"prerelease","version":"9.2.0rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.2.0rc1","date":"2026-06-25T23:01:04Z","type":"prerelease","version":"9.2.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.1","date":"2026-06-03T21:14:12Z","type":"stable","version":"9.1.1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.1rc1","date":"2026-05-29T20:29:47Z","type":"prerelease","version":"9.1.1rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.7.0","date":"2026-05-07T16:47:07Z","type":"stable","version":"8.7.0"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.7.0rc2","date":"2026-05-05T10:38:12Z","type":"prerelease","version":"8.7.0rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.7.0rc1","date":"2026-04-27T20:33:38Z","type":"prerelease","version":"8.7.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.0","date":"2026-04-20T20:15:57Z","type":"stable","version":"9.1.0"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.0rc3","date":"2026-04-15T21:27:05Z","type":"prerelease","version":"9.1.0rc3"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.0rc2","date":"2026-04-14T22:52:24Z","type":"prerelease","version":"9.1.0rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.1.0rc1","date":"2026-04-09T22:00:19Z","type":"prerelease","version":"9.1.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.0.2","date":"2026-04-09T23:33:00Z","type":"stable","version":"9.0.2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.0.2rc3","date":"2026-04-09T20:10:31Z","type":"prerelease","version":"9.0.2rc3"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.0.2rc2","date":"2026-04-07T18:28:22Z","type":"prerelease","version":"9.0.2rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.0.2rc1","date":"2026-04-03T00:47:38Z","type":"prerelease","version":"9.0.2rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.0.1","date":"2026-03-10T18:39:13Z","type":"stable","version":"9.0.1"}]` | `[{"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"}]` |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.scorecard | 6.1 | 8.8 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=conda&package_name=bazel&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%2Ffluxcd%2Fflagger&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (CI/CD Tools)

| Capability | Bazel | Flux CD |
|---|:--:|:--:|
| **Deployment** |  |  |
| Hosting | Self-hosted only | Cloud + self-hosted |
| Self-hosted runners | ✓ | ✓ |
| **Core** |  |  |
| Config-as-code pipelines | - | ✓ |
| Matrix / parallel builds | ✓ | - |
| **Build** |  |  |
| Container-native builds | - | ✓ |
| **Performance** |  |  |
| Build caching | ✓ | - |
| **Security** |  |  |
| Secrets management | - | ✓ |
| **Delivery** |  |  |
| Deployment environments & approvals | - | ✓ |
| **Ecosystem** |  |  |
| Reusable actions / marketplace | ✓ | - |

*Source: Vioscale. Generated 2026-09-01T16:44:19.417Z. "-" = undocumented, not absent.*