Fastify
Fastify: A schema-focused backend framework with extensible plugins and no built-in auth or ORM. Ranked #12 of 31 in Web Frameworks by our editors (7.7/10); pricing: Free plan; best for javaScript teams building schema-validated APIs.
At a glance
- Editor score7.7 / 10
- PricingFree plan
- Best forJavaScript teams building schema-validated APIs
- Free planYes
- Paid fromFree
- Framework typeBackend
- Facts checked24 Sep 2026
Where it wins
- JSON Schema supports route validation and response serialization.
- Encapsulated hooks, plugins and decorators organize extensions.
- Pino logging and TypeScript declarations are included.
Where it doesn't
- Authentication is not built in.
- An ORM is not included.
- Self-hosted deployment and serverless guidance require deployment work.
Our verdict on Fastify
Fastify is an open-source backend framework for building Node.js servers and APIs, suited to JavaScript and TypeScript teams that want schema-validated request handling. It provides route registration, content-type parsing, request and reply utilities, hooks, plugins and decorators. Its low-overhead design and range of extension points fit projects from small applications to larger systems, while its self-hosted model leaves deployment under the team's control.
Schema-based validation and response serialization are central strengths: routes can use JSON Schema for incoming requests and outgoing responses. Fastify also includes Pino logging and TypeScript declarations, with type providers available for typed workflows. HTTP/2 support and serverless deployment guidance broaden where it can fit. The plugin ecosystem can add database connections, authentication, rate limiting and OpenAPI documentation, but those capabilities come through extensions rather than an all-in-one framework bundle.
Fastify is free and open source, with documentation and community support. That makes it a practical option for teams comfortable choosing and maintaining their own plugins and deployment setup. It is less suited to buyers seeking built-in authentication, an included ORM, or a managed hosting experience: those needs require separate choices. Choose Fastify when schema validation, serialization and an encapsulated plugin model matter; consider an alternative if you want those surrounding application capabilities bundled by default.
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Fastify pricing
Fastify fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Framework type | Backend |
| Primary languages | JavaScript, TypeScript |
| Rendering modes | Not verified |
| Included ORM | No |
| Built-in authentication | No |
| Deployment targets | Self-hosted |
| License model | Open-source |
| Deployment | Self-hosted |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | fastify.dev |
| Facts checked | 24 Sep 2026 |
Alternatives to Fastify
- Ruby on RailsRails gives Ruby teams a convention-led, full-stack foundation for database-backed web apps.9.3
- DjangoA free Python backend framework combining ORM, authentication, administration, and deployment flexibility.9.1
- Next.jsA free, open-source full-stack React framework with hybrid rendering and backend routes.9.0
See all Fastify alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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