# Bazel vs Concourse CI

**Leader by Vioscale score:** Bazel

| Attribute | Bazel | Concourse CI |
|---|---|---|
| **Vioscale score** | 65.3 (42% (low)) | 53 (38% (low)) |
| activity.commits_last_30d | 100 | 47 |
| adoption.dependent_repos | 3 | 22 |
| adoption.github_stars | 25,762 | 7,893 |
| deployment.options | `{"self_hosted":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. | - |
| features.capabilities | `{"caching":true,"hosting":"self","marketplace":true,"matrix_builds":true,"self_hosted_runners":true}` | `{"hosting":"self","yaml_pipelines":true,"container_native":true,"self_hosted_runners":true}` |
| integrations.count | - | 4 |
| integrations.list | - | `[{"name":"Open Policy Agent"},{"name":"GitHub"},{"name":"Git"},{"name":"Docker"}]` |
| language.primary | Java | Go |
| license.spdx | Apache-2.0 | Apache-2.0 |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"web":true,"linux":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://bazel.build/","retrievedAt":"2026-08-13T23:02:29.441Z"}` | - |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | free | - |
| pricing.transparent | yes | - |
| release.cadence_days | 5 | 20 |
| 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/concourse/concourse/releases/tag/v8.3.0","date":"2026-08-13T02:49:30Z","type":"stable","version":"v8.3.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.5","date":"2026-08-03T16:39:02Z","type":"stable","version":"v8.2.5"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.4","date":"2026-06-16T15:21:23Z","type":"stable","version":"v8.2.4"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.3","date":"2026-05-27T14:45:37Z","type":"stable","version":"v8.2.3"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.2","date":"2026-05-24T15:33:26Z","type":"stable","version":"v8.2.2"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.1","date":"2026-05-12T21:00:21Z","type":"stable","version":"v8.2.1"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.2.0","date":"2026-05-07T20:41:38Z","type":"stable","version":"v8.2.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.1.1","date":"2026-03-17T20:40:26Z","type":"stable","version":"v8.1.1"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.1.0","date":"2026-03-04T15:38:40Z","type":"stable","version":"v8.1.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.0.2","date":"2026-02-19T21:50:25Z","type":"stable","version":"v8.0.2"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.0.1","date":"2026-01-29T16:32:52Z","type":"stable","version":"v8.0.1"},{"url":"https://github.com/concourse/concourse/releases/tag/v8.0.0","date":"2026-01-15T14:39:14Z","type":"stable","version":"v8.0.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.14.3","date":"2025-11-12T23:10:58Z","type":"stable","version":"v7.14.3"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.14.2","date":"2025-10-07T00:57:49Z","type":"stable","version":"v7.14.2"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.14.1","date":"2025-08-18T23:44:26Z","type":"stable","version":"v7.14.1"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.14.0","date":"2025-08-12T13:32:44Z","type":"stable","version":"v7.14.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.13.2","date":"2025-05-23T17:04:42Z","type":"stable","version":"v7.13.2"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.13.1","date":"2025-04-09T15:28:43Z","type":"stable","version":"v7.13.1"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.13.0","date":"2025-04-03T14:31:47Z","type":"stable","version":"v7.13.0"},{"url":"https://github.com/concourse/concourse/releases/tag/v7.12.1","date":"2025-01-23T21:41:55Z","type":"stable","version":"v7.12.1"}]` |
| security.scorecard | 6.1 | 5.8 |
| 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":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fconcourse%2Fconcourse&per_page=100","last_12m":1,"max_severity":"HIGH"}` |

## Capabilities (CI/CD Tools)

| Capability | Bazel | Concourse CI |
|---|:--:|:--:|
| **Deployment** |  |  |
| Hosting | Self-hosted only | Self-hosted only |
| 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 2026-09-01T17:16:10.467Z. "-" = undocumented, not absent.*