# Bazel vs Semaphore

| Attribute | Bazel | Semaphore |
|---|---|---|
| **Vioscale score** | 65.3 (42% (low)) | 68.4 (71% (medium)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 3 | - |
| adoption.github_stars | 25,762 | - |
| 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. | An all-in-one continuous integration and delivery system that enables teams to automate testing and deployment workflows. It supports containerized and cloud-native architectures and can be deployed as a managed cloud service or self-hosted. |
| features.capabilities | `{"caching":true,"hosting":"self","marketplace":true,"matrix_builds":true,"self_hosted_runners":true}` | `{"matrix_builds":true,"yaml_pipelines":true,"container_native":true,"self_hosted_runners":true}` |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Flowdock"}]` |
| language.primary | Java | - |
| license.spdx | Apache-2.0 | - |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://bazel.build/","retrievedAt":"2026-08-13T23:02:29.441Z"}` | `{"type":"usage","plans":[{"free":false,"name":"Compute - Ubuntu ARM","summary":"$0.003–$0.012/min depending on vCPU","components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.003,"currency":"USD","specification":"2vCPU"},{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.006,"currency":"USD","specification":"4vCPU"},{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.012,"currency":"USD","specification":"8vCPU"}],"contactSales":false,"includedLimits":{"concurrent_jobs":"20 by default"}},{"free":false,"name":"Compute - Ubuntu x64","summary":"$0.0075–$0.015/min depending on vCPU","components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.0075,"currency":"USD","specification":"2vCPU"},{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.015,"currency":"USD","specification":"4vCPU"}],"contactSales":false,"includedLimits":{"concurrent_jobs":"20 by default"}},{"free":false,"name":"Compute - MacOS","summary":"$0.09/min","components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.09,"currency":"USD","specification":"4vCPU"}],"contactSales":false,"includedLimits":{"concurrent_jobs":"20 by default"}},{"free":false,"name":"Compute - Self-Hosted","summary":"$0.0025/min","components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.0025,"currency":"USD"}],"contactSales":false,"includedLimits":{"concurrent_jobs":"contact for limits"}}],"addOns":[{"name":"Dedicated Cache Server","components":[{"kind":"fixed","amount":400,"period":"month","currency":"USD"}]},{"name":"Private Docker Registry","components":[{"kind":"fixed","amount":400,"period":"month","currency":"USD"}]},{"name":"Support - Basic","components":[{"kind":"fixed","amount":50,"period":"month","currency":"USD"}]},{"name":"Support - Priority Response","components":[{"kind":"fixed","amount":250,"period":"month","currency":"USD"}]},{"name":"Support - SLA Standard","components":[{"kind":"fixed","amount":500,"period":"month","currency":"USD"}]},{"name":"Support - SLA Premium","components":[{"kind":"fixed","amount":750,"period":"month","currency":"USD"}]},{"name":"Success - Visibility","components":[{"kind":"fixed","amount":125,"period":"month","currency":"USD"}]},{"name":"Success - Performance","components":[{"kind":"fixed","amount":300,"period":"month","currency":"USD"}]},{"name":"Success - Scale","components":[{"kind":"fixed","amount":1000,"period":"month","currency":"USD"}]},{"name":"Success - Alliance","components":[{"kind":"fixed","amount":2000,"period":"month","currency":"USD"}]},{"name":"Engineering Access","components":[{"kind":"one_time","amount":900,"currency":"USD"},{"kind":"one_time","amount":1250,"currency":"USD"},{"kind":"one_time","amount":2000,"currency":"USD"}]}],"summary":"Pay-per-minute metered compute: $0.0025/min (self-hosted) to $0.09/min (MacOS). Includes 20 concurrent jobs, $15/month free credits, 9.6 GB cache, and free support. Optional modular support and success services.","currency":"USD","freeTier":true,"sourceUrl":"https://semaphore.io/","retrievedAt":"2026-08-03T20:21:00.253Z","startingPrice":{"amount":0.0025,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | yes |
| release.cadence_days | 5 | - |
| 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"}]` | - |
| reliability.status_page | - | yes |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.scorecard | 6.1 | - |
| security.soc2 | - | yes |
| 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}` | - |

## Capabilities (CI/CD Tools)

| Capability | Bazel | Semaphore |
|---|:--:|:--:|
| **Deployment** |  |  |
| Hosting | 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 2026-09-01T17:30:21.179Z. "-" = undocumented, not absent.*