# ASP.NET Core vs Elysia

**Leader by vioscaleAI score:** ASP.NET Core

| Attribute | ASP.NET Core | Elysia |
|---|---|---|
| **vioscaleAI score** | 71.2 (76% (high)) | 55.8 (67% (medium)) |
| activity.commits_last_30d | - | 6 |
| adoption.dependent_repos | - | 45 |
| adoption.github_stars | - | 19,241 |
| adoption.package_downloads_weekly | - | 1,653,418 |
| content.faq | `[{"answer":"A framework for building web apps and services with .NET and C#. Includes Blazor for web UI development, REST APIs, real-time communication, and AI/ML capabilities. It is indexed under Web Frameworks.","source":"https://dotnet.microsoft.com/en-us/apps/aspnet","question":"What is ASP.NET Core?","confidence":0.6},{"answer":"ASP.NET Core is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.","source":"https://dotnet.microsoft.com/en-us/apps/aspnet","question":"Is ASP.NET Core free to use?","confidence":0.6},{"answer":"ASP.NET Core supports the web, Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://dotnet.microsoft.com/en-us/apps/aspnet","question":"What platforms does ASP.NET Core support?","confidence":0.6},{"answer":"Yes. ASP.NET Core can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://dotnet.microsoft.com/en-us/apps/aspnet","question":"Can ASP.NET Core be self-hosted?","confidence":0.6},{"answer":"We have confirmed 6 integrations for ASP.NET Core, including Google, X, OpenAI, Azure, Power Apps and Power Platform. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://dotnet.microsoft.com/en-us/apps/aspnet","question":"What does ASP.NET Core integrate with?","confidence":0.6}]` | `[{"answer":"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. It is indexed under Web Frameworks.","source":"https://elysiajs.com/","question":"What is Elysia?","confidence":0.6},{"answer":"Elysia is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://elysiajs.com/","question":"Is Elysia free to use?","confidence":0.6},{"answer":"Elysia supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://elysiajs.com/","question":"What platforms does Elysia support?","confidence":0.6},{"answer":"Yes. Elysia can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://elysiajs.com/","question":"Can Elysia be self-hosted?","confidence":0.6},{"answer":"Yes. Elysia is published under the MIT 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/elysiajs/elysia","question":"Is Elysia open source?","confidence":0.99}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An open-source framework that extends the .NET platform with tools and libraries for creating modern, cloud-based web applications and services deployable across Windows, Linux, and macOS | Elysia is a backend framework for TypeScript that enables end-to-end type safety between client and server code without code generation. It features automatic request validation, type inference, built-in OpenAPI documentation generation, and integrated instrumentation for monitoring via OpenTelemetry. |
| features.capabilities | `{"language":"C#","api_first":true,"api_routes":true,"async_model":"event-loop-async","orm_included":true,"openapi_autogen":true,"language_runtime":"C#/.NET","templating_included":true,"dependency_injection":true}` | `{"language":"TypeScript","api_routes":true,"hot_reload":true,"typescript_first":true}` |
| integrations.count | 4 | 4 |
| integrations.list | `[{"name":"Google"},{"name":"X"},{"name":"OpenAI"},{"name":"Azure"},{"name":"Power Apps"},{"name":"Power Platform","native":true,"category":"platform","direction":"outbound"}]` | `[{"name":"OpenTelemetry","native":true,"category":"observability","direction":"outbound"},{"name":"Next.js","native":false,"direction":"bidirectional"},{"name":"Bun","native":false},{"name":"GitHub","native":false,"direction":"inbound"}]` |
| language.primary | - | TypeScript |
| license.spdx | - | MIT |
| platform.support | `{"mac":true,"web":true,"linux":true,"windows":true}` | `{"cli":true}` |
| pricing | `{"type":"free","summary":"Free and open source","freeTier":true,"sourceUrl":"https://dotnet.microsoft.com/en-us/apps/aspnet","retrievedAt":"2026-10-05T12:44:19.114Z"}` | `{"type":"open_source","sourceUrl":"https://elysiajs.com/","retrievedAt":"2026-08-13T23:06:30.535Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | free | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | - | 9 |
| 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"}]` |
| security.vulnerabilities | - | `{"count":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=elysia&per_page=100","last_12m":5,"max_severity":"CRITICAL"}` |

## Capabilities (Web Frameworks)

| Capability | ASP.NET Core | Elysia |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | - |
| File-based routing | - | - |
| Language | C# | TypeScript |
| **Rendering** |  |  |
| Server components | - | - |
| Streaming SSR | - | - |
| **Fullstack** |  |  |
| Built-in API / backend routes | ✓ | ✓ |
| **DX** |  |  |
| First-class TypeScript | - | ✓ |
| Fast refresh / HMR | - | ✓ |
| **Deployment** |  |  |
| Edge runtime support | - | - |

*Source: vioscaleAI. Generated 2026-10-16T16:18:20.540Z. "-" = undocumented, not absent.*