# Bazel vs Semaphore

| Attribute | Bazel | Semaphore |
|---|---|---|
| **vioscaleAI score** | 61.6 (42% (low)) | 62.5 (70% (medium)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 3 | - |
| adoption.github_stars | 25,942 | - |
| 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":"An all-in-one continuous integration and delivery platform designed for modern cloud development, offering both open-source self-hosted and cloud-hosted options for building and deploying applications. It is indexed under CI/CD Tools.","source":"https://semaphore.io/","question":"What is Semaphore?","confidence":0.6},{"answer":"Semaphore offers a free tier, so you can start without paying. Paid plans start at $0.00. Pricing changes often, so verify at source before relying on it.","source":"https://semaphore.io/","question":"Is Semaphore free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Semaphore. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://semaphore.io/blog/2013/03/07/semaphore-pricing-update-with-higher-plans.html","question":"What platforms does Semaphore support?","confidence":0.6},{"answer":"Yes. Semaphore can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://semaphore.io/","question":"Can Semaphore be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 and ISO 27001 for Semaphore. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Semaphore not holding them. Always confirm compliance directly before you rely on it.","source":"https://semaphore.io/","question":"What security certifications does Semaphore have?","confidence":0.48}]` |
| 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. | A delivery platform that combines CI/CD capabilities with AI-driven features through a command-line interface. |
| 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":"both","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}` | `{"cli":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://bazel.build/","retrievedAt":"2026-10-13T13:55:36.070Z"}` | `{"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 | open_source | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | 4 | - |
| 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"}]` | - |
| reliability.status_page | - | yes |
| security.disclosure_policy | yes | - |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.scorecard | 5.7 | - |
| 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 | 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: vioscaleAI. Generated 2026-10-19T01:29:04.122Z. "-" = undocumented, not absent.*