# Express vs Micronaut

**Leader by vioscaleAI score:** Express

| Attribute | Express | Micronaut |
|---|---|---|
| **vioscaleAI score** | 75.7 (77% (high)) | 59.4 (75% (high)) |
| activity.commits_last_30d | 10 | 100 |
| adoption.dependent_repos | 1,853,938 | 1,864 |
| adoption.github_stars | 69,528 | 6,432 |
| adoption.package_downloads_weekly | 168,467,798 | - |
| adoption.stackoverflow_questions | 96,000 | - |
| content.faq | `[{"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}]` | `[{"answer":"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. It is indexed under Web Frameworks.","source":"https://micronaut.io/","question":"What is Micronaut?","confidence":0.6},{"answer":"Micronaut is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://micronaut.io/","question":"Is Micronaut free to use?","confidence":0.6},{"answer":"Micronaut supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://micronaut.io/","question":"What platforms does Micronaut support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Micronaut, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://micronaut.io/","question":"Can Micronaut be self-hosted?","confidence":0.6},{"answer":"We have confirmed 19 integrations for Micronaut, including GraalVM, Netty, Jackson, Gradle, RabbitMQ, gRPC, Consul and Eureka, plus 11 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://micronaut.io/","question":"What does Micronaut integrate with?","confidence":0.6},{"answer":"Yes. Micronaut is published under the Apache-2.0 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/micronaut-projects/micronaut-core","question":"Is Micronaut open source?","confidence":0.95},{"answer":"Micronaut is available worldwide. Its primary market is the United States. The vendor is headquartered in the United States.","source":"https://micronaut.io/","question":"Where is Micronaut available?","confidence":0.75}]` |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | `{"cloud":true}` |
| description.long | A flexible web framework providing essential features for web applications and APIs while allowing developers to choose their own complementary tools and libraries. | A JVM-based framework emphasizing compile-time dependency injection and native image compilation to build high-performance distributed applications with minimal memory overhead and startup time. |
| features.capabilities | `{"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}` | `{"language":"Java, Groovy, Kotlin","api_routes":true}` |
| integrations.count | 13 | 13 |
| integrations.list | `[{"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"}]` | `[{"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"},{"name":"Jib","native":true,"category":"deployment"},{"name":"Maven","native":true,"category":"build_tool"},{"name":"Docker","native":true,"category":"deployment"}]` |
| language.primary | JavaScript | Java |
| license.spdx | MIT | Apache-2.0 |
| market.availability | `{"source":"https://expressjs.com","hqCountry":"US","confidence":0.95,"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://expressjs.com","retrievedAt":"2026-10-05T10:08:30.684Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://micronaut.io/","retrievedAt":"2026-08-13T23:07:33.979Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 4 | 1 |
| 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"}]` | `[{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.31","date":"2026-10-08T20:09:27Z","type":"stable","version":"v4.10.31"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.15","date":"2026-10-08T19:54:27Z","type":"stable","version":"v3.10.15"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.15","date":"2026-10-07T10:42:41Z","type":"stable","version":"v5.2.15"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.14","date":"2026-10-05T18:58:49Z","type":"stable","version":"v5.2.14"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.13","date":"2026-10-02T12:31:32Z","type":"stable","version":"v5.2.13"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.14","date":"2026-10-02T14:31:57Z","type":"stable","version":"v3.10.14"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.12","date":"2026-10-01T14:52:29Z","type":"stable","version":"v5.2.12"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.11","date":"2026-10-01T08:15:11Z","type":"stable","version":"v5.2.11"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.13","date":"2026-10-01T07:59:09Z","type":"stable","version":"v3.10.13"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.10","date":"2026-09-30T11:32:01Z","type":"stable","version":"v5.2.10"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.30","date":"2026-09-30T06:09:33Z","type":"stable","version":"v4.10.30"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.9","date":"2026-09-28T05:52:59Z","type":"stable","version":"v5.2.9"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.8","date":"2026-09-26T11:55:50Z","type":"stable","version":"v5.2.8"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.7","date":"2026-09-24T20:26:41Z","type":"stable","version":"v5.2.7"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.6","date":"2026-09-24T14:26:18Z","type":"stable","version":"v5.2.6"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.5","date":"2026-09-23T18:08:36Z","type":"stable","version":"v5.2.5"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.4","date":"2026-09-23T07:24:57Z","type":"stable","version":"v5.2.4"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.29","date":"2026-09-22T17:54:33Z","type":"stable","version":"v4.10.29"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.3","date":"2026-09-21T13:01:17Z","type":"stable","version":"v5.2.3"},{"url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v5.2.2","date":"2026-09-14T14:45:12Z","type":"stable","version":"v5.2.2"}]` |
| security.disclosure_policy | yes | yes |
| security.scorecard | 8.9 | 7.4 |
| security.trust_center | https://expressjs.com/en/advanced/security-updates | https://micronaut.io/tag/security/ |
| 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"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=io.micronaut%3Amicronaut-validation&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Web Frameworks)

| Capability | Express | Micronaut |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | - |
| File-based routing | ✗ | - |
| Language | JavaScript | 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: vioscaleAI. Generated 2026-10-16T00:21:29.660Z. "-" = undocumented, not absent.*