Fastify vs NestJS

Node meets angular's server-side cousin. Here's our take.

Fastify

Nice Pick

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

NestJS

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

The Verdict

Use Fastify if: You want blazing fast performance with low overhead and can live with smaller ecosystem compared to express, so you might end up writing more custom plugins.

Use NestJS if: You prioritize built-in dependency injection makes testing a breeze over what Fastify offers.

The Bottom Line

Fastify wins

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