# Fastify vs Micronaut

| Attribute | Fastify | Micronaut |
|---|---|---|
| **Vioscale score** | 63.9 (78% (high)) | 62.2 (78% (high)) |
| activity.commits_last_30d | 69 | 76 |
| adoption.dependent_repos | 16,712 | 1,305 |
| adoption.github_stars | 37,024 | 6,421 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | A Node.js web framework optimized to handle high request volumes with minimal overhead, featuring a plugin system, JSON Schema validation, and native TypeScript support. | 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. |
| features.capabilities | `{"language":"JavaScript/TypeScript","api_routes":true,"typescript_first":true}` | `{"language":"Java, Groovy, Kotlin","api_routes":true}` |
| integrations.count | 17 | 19 |
| integrations.list | `[{"name":"Next.js"},{"name":"Apollo Server"},{"name":"Angular"},{"name":"PostgreSQL"},{"name":"MongoDB"},{"name":"Redis"},{"name":"Elasticsearch"},{"name":"Swagger/OpenAPI"},{"name":"WebSocket"},{"name":"JWT"},{"name":"Helmet"},{"name":"Sentry"},{"name":"RabbitMQ"},{"name":"CORS"},{"name":"CSRF"},{"name":"OAuth2"},{"name":"Kubernetes"}]` | `[{"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 | JavaScript | Java |
| license.spdx | MIT | Apache-2.0 |
| market.availability | - | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | - | `{"cli":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://fastify.dev","retrievedAt":"2026-08-16T21:34:26.497Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://micronaut.io/","retrievedAt":"2026-08-13T23:07:33.979Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| pricing.transparent | - | yes |
| release.cadence_days | 3 | 1 |
| release.history | `[{"url":"https://github.com/fastify/fastify/releases/tag/v6.0.0-alpha.2","date":"2026-08-19T01:54:36Z","type":"prerelease","version":"v6.0.0-alpha.2"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.12.1","date":"2026-08-18T19:51:41Z","type":"stable","version":"v5.12.1"},{"url":"https://github.com/fastify/fastify/releases/tag/v6.0.0-alpha.1","date":"2026-08-13T15:57:10Z","type":"prerelease","version":"v6.0.0-alpha.1"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.12.0","date":"2026-08-13T15:55:21Z","type":"stable","version":"v5.12.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v6.0.0-alpha.0","date":"2026-08-11T08:32:37Z","type":"prerelease","version":"v6.0.0-alpha.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.11.3","date":"2026-08-08T06:55:46Z","type":"stable","version":"v5.11.3"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.11.2","date":"2026-08-03T08:21:47Z","type":"stable","version":"v5.11.2"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.11.1","date":"2026-08-03T08:10:10Z","type":"stable","version":"v5.11.1"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.11.0","date":"2026-07-30T09:32:16Z","type":"stable","version":"v5.11.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.10.0","date":"2026-07-05T09:37:06Z","type":"stable","version":"v5.10.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.9.0","date":"2026-06-28T08:21:36Z","type":"stable","version":"v5.9.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.5","date":"2026-04-14T12:09:02Z","type":"stable","version":"v5.8.5"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.4","date":"2026-03-23T10:31:20Z","type":"stable","version":"v5.8.4"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.3","date":"2026-03-23T10:20:21Z","type":"stable","version":"v5.8.3"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.2","date":"2026-03-07T09:42:46Z","type":"stable","version":"v5.8.2"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.1","date":"2026-03-05T10:10:57Z","type":"stable","version":"v5.8.1"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.8.0","date":"2026-03-05T09:33:05Z","type":"stable","version":"v5.8.0"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.7.4","date":"2026-02-02T18:23:39Z","type":"stable","version":"v5.7.4"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.7.3","date":"2026-02-02T17:57:52Z","type":"stable","version":"v5.7.3"},{"url":"https://github.com/fastify/fastify/releases/tag/v5.7.2","date":"2026-01-26T11:15:54Z","type":"stable","version":"v5.7.2"}]` | `[{"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"}]` |
| security.disclosure_policy | - | yes |
| security.scorecard | 8.3 | 7.2 |
| security.vulnerabilities | `{"count":10,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=fastify&per_page=100","last_12m":5,"max_severity":"HIGH"}` | `{"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"}` |

## Capabilities (Web Frameworks)

| Capability | Fastify | Micronaut |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | - |
| File-based routing | - | - |
| Language | JavaScript/TypeScript | Java, Groovy, Kotlin |
| **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 2026-09-01T17:03:21.666Z. "-" = undocumented, not absent.*