# ASP.NET Core vs Express

| Attribute | ASP.NET Core | Express |
|---|---|---|
| **vioscaleAI score** | 71.2 (76% (high)) | 75.7 (77% (high)) |
| activity.commits_last_30d | - | 10 |
| adoption.dependent_repos | - | 1,853,938 |
| adoption.github_stars | - | 69,528 |
| adoption.package_downloads_weekly | - | 168,467,798 |
| adoption.stackoverflow_questions | - | 96,000 |
| 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 minimal framework providing essential routing, middleware, and HTTP utilities for building web applications and APIs in Node.js without imposing architectural constraints. It is indexed under Web Frameworks.","source":"https://expressjs.com","question":"What is Express?","confidence":0.6},{"answer":"Express 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://expressjs.com","question":"Is Express free to use?","confidence":0.6},{"answer":"Express supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://expressjs.com","question":"What platforms does Express support?","confidence":0.6},{"answer":"Yes. Express can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://expressjs.com","question":"Can Express be self-hosted?","confidence":0.6},{"answer":"We have confirmed 13 integrations for Express, including Cassandra, Couchbase, CouchDB, LevelDB, MySQL, MongoDB, Neo4j and Oracle, plus 5 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://expressjs.com","question":"What does Express integrate with?","confidence":0.6},{"answer":"Yes. Express 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/expressjs/express","question":"Is Express open source?","confidence":0.99},{"answer":"Express is available worldwide. Its primary market is the United States. The vendor is headquartered in the United States.","source":"https://expressjs.com","question":"Where is Express available?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"on_prem":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 | A flexible web framework providing essential features for web applications and APIs while allowing developers to choose their own complementary tools and libraries. |
| 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":"JavaScript","api_routes":true,"hot_reload":false,"edge_runtime":false,"file_routing":false,"license_type":"MIT/BSD","orm_included":false,"streaming_ssr":false,"language_runtime":"JS/TS","typescript_first":false,"server_components":false,"architecture_style":"minimalist","templating_included":true}` |
| integrations.count | 4 | 13 |
| integrations.list | `[{"name":"Google"},{"name":"X"},{"name":"OpenAI"},{"name":"Azure"},{"name":"Power Apps"},{"name":"Power Platform","native":true,"category":"platform","direction":"outbound"}]` | `[{"name":"Cassandra"},{"name":"Couchbase"},{"name":"CouchDB"},{"name":"LevelDB"},{"name":"MySQL"},{"name":"MongoDB"},{"name":"Neo4j"},{"name":"Oracle"},{"name":"PostgreSQL"},{"name":"Redis"},{"name":"SQL Server"},{"name":"SQLite"},{"name":"Elasticsearch"}]` |
| language.primary | - | JavaScript |
| license.spdx | - | MIT |
| market.availability | - | `{"source":"https://expressjs.com","hqCountry":"US","confidence":0.95,"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"mac":true,"web":true,"linux":true,"windows":true}` | `{"cli":true,"web":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","freeTier":true,"sourceUrl":"https://expressjs.com","retrievedAt":"2026-10-05T10:08:30.684Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | free | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 4 |
| release.history | - | `[{"url":"https://github.com/expressjs/express/releases/tag/v4.22.2","date":"2026-05-11T18:54:02Z","type":"stable","version":"v4.22.2"},{"url":"https://github.com/expressjs/express/releases/tag/v5.2.1","date":"2025-12-01T20:54:44Z","type":"stable","version":"v5.2.1"},{"url":"https://github.com/expressjs/express/releases/tag/v5.2.0","date":"2025-12-01T16:21:03Z","type":"stable","version":"v5.2.0"},{"url":"https://github.com/expressjs/express/releases/tag/v4.22.1","date":"2025-12-01T20:55:45Z","type":"stable","version":"v4.22.1"},{"url":"https://github.com/expressjs/express/releases/tag/4.22.0","date":"2025-12-01T16:19:48Z","type":"stable","version":"4.22.0"},{"url":"https://github.com/expressjs/express/releases/tag/v5.0.1","date":"2024-10-08T19:41:00Z","type":"stable","version":"v5.0.1"},{"url":"https://github.com/expressjs/express/releases/tag/v5.1.0","date":"2025-03-31T14:04:44Z","type":"stable","version":"v5.1.0"},{"url":"https://github.com/expressjs/express/releases/tag/4.21.2","date":"2024-12-05T22:41:41Z","type":"stable","version":"4.21.2"},{"url":"https://github.com/expressjs/express/releases/tag/4.21.1","date":"2024-10-08T18:38:48Z","type":"stable","version":"4.21.1"},{"url":"https://github.com/expressjs/express/releases/tag/4.21.0","date":"2024-09-11T22:34:26Z","type":"stable","version":"4.21.0"},{"url":"https://github.com/expressjs/express/releases/tag/v5.0.0","date":"2024-09-10T04:51:37Z","type":"stable","version":"v5.0.0"},{"url":"https://github.com/expressjs/express/releases/tag/4.20.0","date":"2024-09-10T02:06:04Z","type":"stable","version":"4.20.0"},{"url":"https://github.com/expressjs/express/releases/tag/v5.0.0-beta.3","date":"2024-03-25T14:59:35Z","type":"prerelease","version":"v5.0.0-beta.3"},{"url":"https://github.com/expressjs/express/releases/tag/4.19.2","date":"2024-03-25T14:32:36Z","type":"stable","version":"4.19.2"},{"url":"https://github.com/expressjs/express/releases/tag/5.0.0-beta.2","date":"2024-03-25T14:59:09Z","type":"prerelease","version":"5.0.0-beta.2"},{"url":"https://github.com/expressjs/express/releases/tag/4.19.1","date":"2024-03-25T14:31:15Z","type":"stable","version":"4.19.1"},{"url":"https://github.com/expressjs/express/releases/tag/4.19.0","date":"2024-03-20T16:43:00Z","type":"stable","version":"4.19.0"},{"url":"https://github.com/expressjs/express/releases/tag/4.18.3","date":"2024-02-29T11:44:48Z","type":"stable","version":"4.18.3"},{"url":"https://github.com/expressjs/express/releases/tag/4.18.2","date":"2022-10-08T20:12:36Z","type":"stable","version":"4.18.2"},{"url":"https://github.com/expressjs/express/releases/tag/4.18.1","date":"2022-04-29T19:32:52Z","type":"stable","version":"4.18.1"}]` |
| security.disclosure_policy | - | yes |
| security.scorecard | - | 8.9 |
| security.trust_center | - | https://expressjs.com/en/advanced/security-updates |
| security.vulnerabilities | - | `{"count":6,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=express&per_page=100","last_12m":1,"max_severity":"MODERATE"}` |

## Capabilities (Web Frameworks)

| Capability | ASP.NET Core | Express |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | - |
| File-based routing | - | ✗ |
| Language | C# | JavaScript |
| **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 2026-10-16T19:03:45.105Z. "-" = undocumented, not absent.*