NestJS vs Fastify

Angular's server-side cousin meets node. Here's our take.

NestJS

Nice Pick

Angular's server-side cousin. All the decorators, none of the browser drama.

Pros

• Built-in dependency injection makes testing a breeze
• Modular architecture scales well for large projects
• Strong TypeScript support out of the box
• Integrates seamlessly with Express or Fastify

Cons

• Steep learning curve if you're new to Angular-style patterns
• Can feel over-engineered for simple APIs

Fastify

Node.js on steroids. All the speed, none of the bloat—unless you count the plugin addiction.

Pros

• Blazing fast performance with low overhead
• Built-in validation and serialization out of the box
• Plugin architecture that actually scales without spaghetti code

Cons

• Smaller ecosystem compared to Express, so you might end up writing more custom plugins
• Steeper learning curve for those used to more verbose frameworks

The Verdict

Use NestJS if: You want built-in dependency injection makes testing a breeze and can live with steep learning curve if you're new to angular-style patterns.

Use Fastify if: You prioritize blazing fast performance with low overhead over what NestJS offers.

The Bottom Line

NestJS wins

Angular's server-side cousin. All the decorators, none of the browser drama.