Hey there! I haven't used it much, But AFAIK it's a frontend framework, while fastify is one for backend, just like ExpressJS. I'm not a JS developer, but I recently started working with React, and Fastify Journey's been awesome, Hoping to checkout NestJS next!

Sunrit Jana All the best on your journey Sunrit. You're doing great for your age. Keep it up.

Btw NestJS is a backend framework based on NodeJS. It has express as default, but still fastify can be configured in that. Try it out.