express vs Fastify

Node.js requirements, dependency trees, type declarations, and release-specific advisories. Browser bundle size may not be applicable.

How to use this comparison

Choose according to your required APIs, runtime, integration constraints, and license terms. A smaller provider bundle or higher download count does not establish the best choice. Measurements use the same provider scenario; application imports and peer dependencies can change the outcome.

Check each exact release

• express@5.3.0 — express@5.3.0 was published on 2026-10-09. Its manifest declares 28 runtime dependencies and 0 peer requirements. Bundled type declarations are not declared in the inspected metadata. The declared Node.js requirement is >= 18.
• fastify@5.12.7 — fastify@5.12.7 was published on 2026-10-13. Its manifest declares 15 runtime dependencies and 0 peer requirements. Type declarations are bundled according to the package metadata. No Node.js engine requirement is declared in this manifest.