# Micronaut vs Ruby on Rails

| Attribute | Micronaut | Ruby on Rails |
|---|---|---|
| **Vioscale score** | 62.2 (78% (high)) | 66.5 (52% (medium)) |
| activity.commits_last_30d | 76 | 100 |
| adoption.dependent_repos | 1,305 | 1,358,186 |
| adoption.github_stars | 6,421 | 58,719 |
| deployment.options | `{"cloud":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A modern Java framework designed to reduce startup time and memory overhead through compile-time optimization rather than runtime reflection, providing built-in support for dependency injection, aspect-oriented programming, cloud-native patterns, and microservice infrastructure. | A Ruby-based framework bundling everything needed for web development: database management, templating engines, email delivery, real-time updates, async job handling, file storage, and built-in protections against common attacks like SQL injection and cross-site scripting. |
| features.capabilities | `{"language":"Java, Groovy, Kotlin","api_routes":true}` | `{"language":"Ruby","rendering":"ssr","api_routes":true,"typescript_first":false}` |
| integrations.count | 19 | - |
| integrations.list | `[{"name":"GraalVM"},{"name":"Netty"},{"name":"Jackson"},{"name":"Gradle"},{"name":"RabbitMQ"},{"name":"gRPC"},{"name":"Consul"},{"name":"Eureka"},{"name":"Elasticsearch"},{"name":"Redis"},{"name":"Flyway"},{"name":"Logback"},{"name":"SDKMAN"},{"name":"PostgreSQL"},{"name":"MySQL"},{"name":"Oracle"},{"name":"MariaDB"},{"name":"SQL Server"},{"name":"H2"}]` | - |
| language.primary | Java | Ruby |
| license.spdx | Apache-2.0 | MIT |
| market.availability | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true}` | `{"mac":true,"web":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://micronaut.io/","retrievedAt":"2026-08-13T23:07:33.979Z"}` | `{"type":"open_source","sourceUrl":"https://rubyonrails.org","retrievedAt":"2026-08-16T21:36:16.955Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 1 | - |
| release.history | `[{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.12","date":"2026-08-21T08:14:23Z","type":"stable","version":"v5.1.12"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.11","date":"2026-08-17T07:53:29Z","type":"stable","version":"v5.1.11"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.0.7","date":"2026-07-23T08:40:46Z","type":"stable","version":"v5.0.7"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.10","date":"2026-07-22T13:17:31Z","type":"stable","version":"v5.1.10"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.9","date":"2026-07-21T11:40:52Z","type":"stable","version":"v5.1.9"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.8","date":"2026-07-20T12:04:10Z","type":"stable","version":"v5.1.8"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.7","date":"2026-07-17T15:05:49Z","type":"stable","version":"v5.1.7"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.0.6","date":"2026-07-15T13:01:39Z","type":"stable","version":"v5.0.6"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.6","date":"2026-07-13T10:07:03Z","type":"stable","version":"v5.1.6"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.10","date":"2026-07-13T08:59:47Z","type":"stable","version":"v3.10.10"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.5","date":"2026-07-09T11:33:40Z","type":"stable","version":"v5.1.5"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.4","date":"2026-07-08T13:21:09Z","type":"stable","version":"v5.1.4"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.26","date":"2026-07-08T07:46:02Z","type":"stable","version":"v4.10.26"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.0.5","date":"2026-07-07T07:23:53Z","type":"stable","version":"v5.0.5"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.3","date":"2026-06-29T12:22:10Z","type":"stable","version":"v5.1.3"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.0.4","date":"2026-06-29T09:56:51Z","type":"stable","version":"v5.0.4"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.9","date":"2026-06-29T09:06:16Z","type":"stable","version":"v3.10.9"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.2","date":"2026-06-19T12:51:22Z","type":"stable","version":"v5.1.2"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.1","date":"2026-06-17T16:27:02Z","type":"stable","version":"v5.1.1"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.1.0","date":"2026-06-16T14:25:45Z","type":"stable","version":"v5.1.0"}]` | `[{"url":"https://github.com/rails/rails/releases/tag/v8.1.3.1","date":"2026-07-29T14:59:54Z","type":"stable","version":"v8.1.3.1"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.1","date":"2026-07-29T15:08:22Z","type":"stable","version":"v8.0.5.1"},{"url":"https://github.com/rails/rails/releases/tag/v7.2.3.2","date":"2026-07-29T15:05:22Z","type":"stable","version":"v7.2.3.2"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.3","date":"2026-03-24T20:26:02Z","type":"stable","version":"v8.1.3"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5","date":"2026-03-24T20:19:33Z","type":"stable","version":"v8.0.5"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.2.1","date":"2026-03-23T19:42:42Z","type":"stable","version":"v8.1.2.1"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.4.1","date":"2026-03-23T19:38:25Z","type":"stable","version":"v8.0.4.1"},{"url":"https://github.com/rails/rails/releases/tag/v7.2.3.1","date":"2026-03-23T19:32:34Z","type":"stable","version":"v7.2.3.1"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.2","date":"2026-01-08T20:17:17Z","type":"stable","version":"v8.1.2"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.1","date":"2025-10-28T23:46:29Z","type":"stable","version":"v8.1.1"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.4","date":"2025-10-28T23:43:23Z","type":"stable","version":"v8.0.4"},{"url":"https://github.com/rails/rails/releases/tag/v7.2.3","date":"2025-10-28T23:24:18Z","type":"stable","version":"v7.2.3"},{"url":"https://github.com/rails/rails/releases/tag/v7.1.6","date":"2025-10-28T23:19:19Z","type":"stable","version":"v7.1.6"},{"url":"https://github.com/rails/rails/releases/tag/v7.0.10","date":"2025-10-28T23:12:55Z","type":"stable","version":"v7.0.10"},{"url":"https://github.com/rails/rails/releases/tag/v7.0.9","date":"2025-10-28T23:02:29Z","type":"stable","version":"v7.0.9"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.0","date":"2025-10-22T00:35:05Z","type":"stable","version":"v8.1.0"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.0.rc1","date":"2025-10-15T00:50:43Z","type":"prerelease","version":"v8.1.0.rc1"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.3","date":"2025-09-22T22:19:48Z","type":"stable","version":"v8.0.3"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.0.beta1","date":"2025-09-04T12:30:05Z","type":"prerelease","version":"v8.1.0.beta1"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.2.1","date":"2025-08-13T20:38:30Z","type":"stable","version":"v8.0.2.1"}]` |
| security.disclosure_policy | yes | yes |
| security.scorecard | 7.2 | 6.8 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=io.micronaut%3Amicronaut-inject&per_page=100","last_12m":1,"max_severity":"LOW"}` | `{"count":18,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=rubygems&package_name=activesupport&per_page=100","last_12m":3,"max_severity":"CRITICAL"}` |

## Capabilities (Web Frameworks)

| Capability | Micronaut | Ruby on Rails |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | Server-side |
| File-based routing | - | - |
| Language | Java, Groovy, Kotlin | Ruby |
| **Rendering** |  |  |
| Server components | - | - |
| Streaming SSR | - | - |
| **Fullstack** |  |  |
| Built-in API / backend routes | ✓ | ✓ |
| **DX** |  |  |
| First-class TypeScript | - | ✗ |
| Fast refresh / HMR | - | - |
| **Deployment** |  |  |
| Edge runtime support | - | - |

*Source: Vioscale. Generated 2026-09-01T15:15:40.804Z. "-" = undocumented, not absent.*