# Elysia vs Fastify

**Leader by Vioscale score:** Fastify

| Attribute | Elysia | Fastify |
|---|---|---|
| **Vioscale score** | 57.5 (70% (medium)) | 63.9 (78% (high)) |
| activity.commits_last_30d | 7 | 69 |
| adoption.dependent_repos | 45 | 16,712 |
| adoption.github_stars | 18,975 | 37,024 |
| adoption.package_downloads_weekly | 1,043,958 | - |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A server-side TypeScript framework for building type-safe APIs with exceptional performance. Built on Bun runtime, it delivers significantly faster request handling than traditional Node frameworks through advanced type inference and validation. | 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. |
| features.capabilities | `{"language":"TypeScript","api_routes":true,"typescript_first":true}` | `{"language":"JavaScript/TypeScript","api_routes":true,"typescript_first":true}` |
| integrations.count | - | 17 |
| 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"}]` |
| language.primary | TypeScript | JavaScript |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true}` | - |
| pricing | `{"type":"open_source","sourceUrl":"https://elysiajs.com/","retrievedAt":"2026-08-13T23:06:30.535Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://fastify.dev","retrievedAt":"2026-08-16T21:34:26.497Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | open_source | commercial |
| pricing.price_level | free | free |
| release.cadence_days | 9 | 3 |
| release.history | `[{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.30","date":"2026-08-26T16:53:35Z","type":"stable","version":"1.4.30"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.29","date":"2026-06-16T22:27:12Z","type":"stable","version":"1.4.29"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.28","date":"2026-03-16T22:27:49Z","type":"stable","version":"1.4.28"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.27","date":"2026-03-01T13:55:44Z","type":"stable","version":"1.4.27"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.26","date":"2026-02-25T10:22:24Z","type":"stable","version":"1.4.26"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.25","date":"2026-02-12T12:30:52Z","type":"stable","version":"1.4.25"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.24","date":"2026-02-10T20:04:14Z","type":"stable","version":"1.4.24"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.23","date":"2026-02-09T04:37:05Z","type":"stable","version":"1.4.23"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.22","date":"2026-01-14T04:57:38Z","type":"stable","version":"1.4.22"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.21","date":"2026-01-04T11:51:33Z","type":"stable","version":"1.4.21"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.20","date":"2026-01-03T14:35:31Z","type":"stable","version":"1.4.20"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.19","date":"2025-12-13T12:41:01Z","type":"stable","version":"1.4.19"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.18","date":"2025-12-04T09:04:14Z","type":"stable","version":"1.4.18"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.17","date":"2025-12-02T07:23:21Z","type":"stable","version":"1.4.17"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.16","date":"2025-11-13T04:33:17Z","type":"stable","version":"1.4.16"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.15","date":"2025-11-03T07:05:57Z","type":"stable","version":"1.4.15"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.14","date":"2025-11-03T04:04:06Z","type":"stable","version":"1.4.14"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.13","date":"2025-10-23T07:21:57Z","type":"stable","version":"1.4.13"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.12","date":"2025-10-15T13:46:37Z","type":"stable","version":"1.4.12"},{"url":"https://github.com/elysiajs/elysia/releases/tag/1.4.11","date":"2025-10-11T20:45:43Z","type":"stable","version":"1.4.11"}]` | `[{"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"}]` |
| security.scorecard | - | 8.3 |
| security.vulnerabilities | `{"count":4,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=elysia&per_page=100","last_12m":4,"max_severity":"CRITICAL"}` | `{"count":10,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=fastify&per_page=100","last_12m":5,"max_severity":"HIGH"}` |

## Capabilities (Web Frameworks)

| Capability | Elysia | Fastify |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | - |
| File-based routing | - | - |
| Language | TypeScript | JavaScript/TypeScript |
| **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 2026-09-01T16:50:55.582Z. "-" = undocumented, not absent.*