# rand vs rand_chacha

| Attribute | rand | rand_chacha |
|---|---|---|
| **Vioscale score** | 60.2 (22% (low)) | 60.2 (22% (low)) |
| activity.commits_last_30d | 5 | 5 |
| adoption.dependent_repos | 86,804 | 86,804 |
| adoption.github_stars | 2,068 | 2,068 |
| content.faq | `[{"answer":"Rand is a random number generation library for the Rust programming language. It provides random number generators and related randomness functionality, supported by comprehensive documentation and API reference materials.","source":"https://rust-random.github.io/book","question":"What is rand?","confidence":0.95},{"answer":"Rand is an open source project available free of charge. There are no licensing fees, subscriptions, or usage-based costs.","source":"https://rust-random.github.io/book","question":"What does rand cost?","confidence":0.95},{"answer":"Rand is designed specifically for Rust developers. It provides native Rust capabilities for integrating random number generation into Rust applications.","source":"https://rust-random.github.io/book","question":"What programming language does rand support?","confidence":0.95},{"answer":"Rand includes extensive documentation and an API reference available through its official website. These resources explain how to implement random number generation in Rust projects.","source":"https://rust-random.github.io/book","question":"Where can I find documentation and API reference?","confidence":0.9},{"answer":"Yes, rand is an open source project released free of charge. Review the project's license terms for details on permitted uses.","source":"https://rust-random.github.io/book","question":"Is rand open source?","confidence":0.85},{"answer":"Rand is intended for Rust developers who need to incorporate random number generation into their applications. It provides core randomness functionality for various types of Rust projects.","source":"https://rust-random.github.io/book","question":"Who should use rand?","confidence":0.85}]` | `[{"answer":"rand_chacha is a random number generation library for the Rust programming language that implements the ChaCha algorithm. It enables Rust applications to generate random numbers.","source":"https://rust-random.github.io/book","question":"What is rand_chacha?","confidence":0.95},{"answer":"Yes, rand_chacha is open-source software and is available at no cost. There are no licensing fees or subscription costs.","source":"https://rust-random.github.io/book","question":"Is rand_chacha free to use?","confidence":0.98},{"answer":"As an open-source project, rand_chacha's source code is publicly available for review, study, and modification according to its open-source license terms.","source":"https://rust-random.github.io/book","question":"Can I view and modify the source code?","confidence":0.95},{"answer":"rand_chacha is designed specifically for the Rust programming language. It integrates with Rust's random number generation ecosystem.","source":"https://rust-random.github.io/book","question":"What programming language does rand_chacha support?","confidence":0.98},{"answer":"Documentation is available on the project's official website. Developers can consult these resources when implementing the library in their projects.","source":"https://rust-random.github.io/book","question":"Where can I find documentation for rand_chacha?","confidence":0.92},{"answer":"Yes, as open-source software, rand_chacha can be used in commercial applications. There are no licensing fees, though users should review the project's license terms for any specific requirements.","source":"https://rust-random.github.io/book","question":"Can I use rand_chacha in commercial projects?","confidence":0.95}]` |
| description.long | Extended documentation for Rust's random number library, including quick start, crates overview, users' guide, and contributor guidelines. | A Rust library providing ChaCha pseudo-random number generation for cryptographic and general-purpose use cases. Integrated into the Rust random ecosystem as part of the broader rand crate. |
| language.primary | Rust | Rust |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | - | `{"cli":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://rust-random.github.io/book","retrievedAt":"2026-08-14T11:04:40.260Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://rust-random.github.io/book","retrievedAt":"2026-08-14T11:07:29.756Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 9 | 9 |
| release.history | `[{"url":"https://github.com/rust-random/rand/releases/tag/0.8.8","date":"2026-08-25T07:58:45Z","type":"stable","version":"0.8.8"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.5","date":"2026-07-11T11:19:03Z","type":"stable","version":"0.9.5"},{"url":"https://github.com/rust-random/rand/releases/tag/0.8.7","date":"2026-07-11T11:19:28Z","type":"stable","version":"0.8.7"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.2","date":"2026-07-02T09:02:44Z","type":"stable","version":"0.10.2"},{"url":"https://github.com/rust-random/rand/releases/tag/0.8.6","date":"2026-04-17T06:44:06Z","type":"stable","version":"0.8.6"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.4","date":"2026-04-13T15:42:39Z","type":"stable","version":"0.9.4"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.1","date":"2026-04-13T15:43:08Z","type":"stable","version":"0.10.1"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.3","date":"2026-04-13T15:42:08Z","type":"stable","version":"0.9.3"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.0","date":"2026-02-14T07:28:28Z","type":"stable","version":"0.10.0"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.2","date":"2026-04-13T15:41:30Z","type":"stable","version":"0.9.2"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.1","date":"2025-04-17T14:40:57Z","type":"stable","version":"0.9.1"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.0","date":"2025-01-27T13:41:24Z","type":"stable","version":"0.9.0"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.0-alpha.0","date":"2024-02-18T17:53:46Z","type":"prerelease","version":"0.9.0-alpha.0"},{"url":"https://github.com/rust-random/rand/releases/tag/rand_distr-0.5.0-alpha.0","date":"2024-02-18T17:56:14Z","type":"prerelease","version":"rand_distr-0.5.0-alpha.0"}]` | `[{"url":"https://github.com/rust-random/rand/releases/tag/0.8.8","date":"2026-08-25T07:58:45Z","type":"stable","version":"0.8.8"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.5","date":"2026-07-11T11:19:03Z","type":"stable","version":"0.9.5"},{"url":"https://github.com/rust-random/rand/releases/tag/0.8.7","date":"2026-07-11T11:19:28Z","type":"stable","version":"0.8.7"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.2","date":"2026-07-02T09:02:44Z","type":"stable","version":"0.10.2"},{"url":"https://github.com/rust-random/rand/releases/tag/0.8.6","date":"2026-04-17T06:44:06Z","type":"stable","version":"0.8.6"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.4","date":"2026-04-13T15:42:39Z","type":"stable","version":"0.9.4"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.1","date":"2026-04-13T15:43:08Z","type":"stable","version":"0.10.1"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.3","date":"2026-04-13T15:42:08Z","type":"stable","version":"0.9.3"},{"url":"https://github.com/rust-random/rand/releases/tag/0.10.0","date":"2026-02-14T07:28:28Z","type":"stable","version":"0.10.0"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.2","date":"2026-04-13T15:41:30Z","type":"stable","version":"0.9.2"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.1","date":"2025-04-17T14:40:57Z","type":"stable","version":"0.9.1"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.0","date":"2025-01-27T13:41:24Z","type":"stable","version":"0.9.0"},{"url":"https://github.com/rust-random/rand/releases/tag/0.9.0-alpha.0","date":"2024-02-18T17:53:46Z","type":"prerelease","version":"0.9.0-alpha.0"},{"url":"https://github.com/rust-random/rand/releases/tag/rand_distr-0.5.0-alpha.0","date":"2024-02-18T17:56:14Z","type":"prerelease","version":"rand_distr-0.5.0-alpha.0"}]` |
| reliability.status_page | yes | yes |
| security.scorecard | 6.2 | 6.2 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=rand&per_page=100","last_12m":1,"max_severity":"LOW"}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=rand&per_page=100","last_12m":1,"max_severity":"LOW"}` |

*Source: Vioscale. Generated 2026-09-01T17:00:33.462Z. "-" = undocumented, not absent.*