HowToBuild- License
- MIT
- Cost
- Open Source
- Self-host
- Yes
Overview
Fastify combines a plugin architecture with JSON Schema integration and a deliberate focus on server performance.
Why it is interesting
Why pay attention
Its encapsulated plugin model makes large Node.js services easier to compose and test.
Editorial status
Recommended for active evaluation.
Best for
- TypeScript or JavaScript APIs
- Services that benefit from schema-driven validation
Not ideal for
- Teams wanting a batteries-included full-stack framework
Open source & pricing
Open Source
The framework is free and self-hostable.
GitHub momentum
★ 37,148
- Last 7 days
- +54
- Last 30 days
- Window incomplete
- Evidence
- 9/10/2026–9/17/2026 · weekly window
Included in stacks
See it in context.
Sources checked
Canonical project facts and open-source licensemaintainer · Sep 4, 2026