Fastify

What Fastify is

Fastify is a free, open-source backend framework for building server-side software with JavaScript or TypeScript. Its framework type is backend, and its deployment target is self-hosted, so developers choose and operate the infrastructure where their applications run. Fastify is available through a free plan. The project’s language focus covers both JavaScript and TypeScript, giving teams those two options for backend development. Fastify does not include an ORM, so database-mapping functionality is outside the listed framework package. It also has no built-in authentication, leaving identity and sign-in capabilities to other components. This makes Fastify a framework for backend application work rather than an all-in-one package for persistence and authentication. Developers can use its open-source license and free availability when selecting a foundation for self-hosted services. Teams evaluating it should account for their own deployment environment and decide separately how their application will handle database access and authentication.

Who it suits

Fastify suits developers building backend software in JavaScript or TypeScript who plan to deploy it on infrastructure they control. It is also suited to teams that want a free, open-source framework and are prepared to choose separate solutions for database mapping and authentication.

Limits

The listed package does not include an ORM or built-in authentication. Deployment is self-hosted, so those application and infrastructure responsibilities remain outside the framework.

Getting started

1. Visit https://fastify.dev/
2. Choose JavaScript or TypeScript for development
3. Use the free plan
4. Deploy the backend on self-hosted infrastructure

Verdict

Pick Fastify if you need a free, open-source backend framework centered on JavaScript or TypeScript and self-hosted deployment. Look elsewhere or budget for additional components if your framework must include an ORM or built-in authentication.