# Bazel vs Concourse CI

**Leader by vioscaleAI score:** Bazel

| Attribute | Bazel | Concourse CI |
|---|---|---|
| **vioscaleAI score** | 61.6 (42% (low)) | 53.2 (50% (medium)) |
| activity.commits_last_30d | 100 | 55 |
| adoption.dependent_repos | 3 | 22 |
| adoption.github_stars | 25,942 | 7,916 |
| content.faq | `[{"answer":"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. It is indexed under CI/CD Tools.","source":"https://bazel.build/","question":"What is Bazel?","confidence":0.6},{"answer":"Bazel 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://bazel.build/","question":"Is Bazel free to use?","confidence":0.6},{"answer":"Bazel 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://bazel.build/","question":"What platforms does Bazel support?","confidence":0.6},{"answer":"Yes. Bazel can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://bazel.build/","question":"Can Bazel be self-hosted?","confidence":0.6},{"answer":"Yes. Bazel 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/bazelbuild/bazel","question":"Is Bazel open source?","confidence":0.95}]` | `[{"answer":"Concourse CI supports the web, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://concourse-ci.org","question":"What platforms does Concourse CI support?","confidence":0.6},{"answer":"Yes. Concourse CI can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://concourse-ci.org","question":"Can Concourse CI be self-hosted?","confidence":0.6},{"answer":"We have confirmed 3 integrations for Concourse CI, including Open Policy Agent, GitHub and Docker. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://concourse-ci.org","question":"What does Concourse CI integrate with?","confidence":0.6},{"answer":"Yes. Concourse CI 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/concourse/concourse","question":"Is Concourse CI open source?","confidence":0.95}]` |
| deployment.options | `{"hybrid":true,"on_prem":true,"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. | An open-source Go-based system that executes containerized automation tasks, commonly used for continuous integration and delivery pipelines at any scale. |
| features.capabilities | `{"caching":true,"hosting":"self","marketplace":true,"open_source":true,"matrix_builds":true,"remote_caching":true,"monorepo_native":true,"polyglot_support":true,"incremental_builds":true,"self_hosted_runners":true,"distributed_remote_execution":true,"hermetic_reproducible_builds":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}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://bazel.build/","retrievedAt":"2026-10-13T13:55:36.070Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://concourse-ci.org","retrievedAt":"2026-10-13T15:11:48.735Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 4 | 20 |
| release.history | `[{"url":"https://github.com/bazelbuild/bazel/releases/tag/10.0.0rc1","date":"2026-10-07T19:23:46Z","type":"prerelease","version":"10.0.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0","date":"2026-10-07T16:47:33Z","type":"stable","version":"9.3.0"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0rc5","date":"2026-10-06T06:33:14Z","type":"prerelease","version":"9.3.0rc5"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0rc4","date":"2026-10-01T00:02:59Z","type":"prerelease","version":"9.3.0rc4"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.1","date":"2026-09-24T21:21:45Z","type":"stable","version":"8.8.1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0rc3","date":"2026-09-23T18:02:07Z","type":"prerelease","version":"9.3.0rc3"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.1rc2","date":"2026-09-22T23:33:48Z","type":"prerelease","version":"8.8.1rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.1rc1","date":"2026-09-22T20:14:08Z","type":"prerelease","version":"8.8.1rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0rc2","date":"2026-09-17T23:53:24Z","type":"prerelease","version":"9.3.0rc2"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/9.3.0rc1","date":"2026-09-15T22:14:23Z","type":"prerelease","version":"9.3.0rc1"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.0","date":"2026-08-31T22:34:10Z","type":"stable","version":"8.8.0"},{"url":"https://github.com/bazelbuild/bazel/releases/tag/8.8.0rc4","date":"2026-08-27T22:41:09Z","type":"prerelease","version":"8.8.0rc4"},{"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/concourse/concourse/releases/tag/v8.3.1","date":"2026-09-28T15:49:57Z","type":"stable","version":"v8.3.1"},{"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"}]` |
| security.disclosure_policy | yes | - |
| security.scorecard | 5.7 | 6.4 |
| 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: vioscaleAI. Generated 2026-10-17T05:46:50.623Z. "-" = undocumented, not absent.*