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Fastify

Node.js web framework for building HTTP APIs and web applications, with a plugin architecture and schema-based validation.

Fastify is a web framework for Node.js that builds HTTP APIs and web applications from routes and plugins registered on a server instance. The server listens on a port once the application calls its listen method, so a container or server deployment runs a process that stays up. The serverless guide also covers running the application on serverless platforms, where the platform starts it per request.

Worth knowing

The serverless guide notes that a larger application takes longer to boot on a function platform. It names Google Cloud Run, AWS Fargate, Azure Container Instances and Vercel as platforms where the server can handle several requests at once.

Identity

Status
Active
Maintainer
OpenJS Foundation1
Maintained by
Foundation

Rendering and deploy

Runs as
Always on, Per request4
Install with
npm install fastify1

Releases

Current major version
56
Last release
2026-10-137

Adoption

GitHub stars
37,2812
npm downloads a week
9,325,7509
Contributors
4328
Dependent repositories
16,71210
Dependent packages
3,27010

Why these figures do not compare

Sources

  1. 2026-10-22: links, Categories, Runtime, Minimum runtime, Install with, Maintainer
    www.fastify.dev/
  2. 2026-10-22: links, Written in, License, GitHub stars
    api.github.com/repos/fastify/fastify
  3. 2026-10-22: links
    fastify.dev/docs/latest/
  4. 2026-10-22: Runs as
    fastify.dev/docs/latest/Guides/Serverless/
  5. 2026-10-22: License
    github.com/fastify/fastify/blob/main/LICENSE
  6. 2026-10-22: Current major version
    registry.npmjs.org/fastify/latest
  7. 2026-10-22: Last release
    api.github.com/repos/fastify/fastify/releases/latest
  8. 2026-10-22: Contributors
    api.github.com/repos/fastify/fastify/contributors?anon=true&per_page=100
  9. 2026-10-22: npm downloads a week
    api.npmjs.org/downloads/point/last-week/fastify
  10. 2026-10-25: Dependent repositories, Dependent packages
    packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/fastify

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