StackShareStackShare
Follow on
StackShare

Discover and share technology stacks from companies around the world.

Follow on

© 2025 StackShare. All rights reserved.

Product

  • Stacks
  • Tools
  • Feed

Company

  • About
  • Contact

Legal

  • Privacy Policy
  • Terms of Service
  1. Stackups
  2. Application & Data
  3. Microframeworks
  4. Microframeworks
  5. Fastify vs Ktor

Fastify vs Ktor

OverviewComparisonAlternatives

Overview

Fastify
Fastify
Stacks506
Followers523
Votes95
GitHub Stars34.9K
Forks2.5K
Ktor
Ktor
Stacks173
Followers339
Votes27
GitHub Stars14.1K
Forks1.2K

Fastify vs Ktor: What are the differences?

Fastify: Fast and low overhead web framework, for Node.js. Fastify is a web framework highly focused on speed and low overhead. It is inspired from Hapi and Express and as far as we know, it is one of the fastest web frameworks in town. Use Fastify can increase your throughput up to 100%; Ktor: Framework for quickly creating connected applications in Kotlin. It is a framework for building asynchronous servers and clients in connected systems using the Kotlin programming language.

Fastify and Ktor belong to "Microframeworks (Backend)" category of the tech stack.

Some of the features offered by Fastify are:

  • 100% asynchronous: all the core is implemented with asynchronous code, in this way not even a millisecond is wasted.
  • Highly performant: as far as we know, Fastify is one of the fastest web frameworks in town, depending on the code complexity we can serve up to 20000 request per second.
  • Extendible: Fastify is fully extensible via its hooks, plugins and decorators.

On the other hand, Ktor provides the following key features:

  • Unopinionated
  • Asynchronous
  • Testable

Fastify and Ktor are both open source tools. It seems that Fastify with 13.1K GitHub stars and 852 forks on GitHub has more adoption than Ktor with 6.1K GitHub stars and 470 GitHub forks.

Share your Stack

Help developers discover the tools you use. Get visibility for your team's tech choices and contribute to the community's knowledge.

View Docs
CLI (Node.js)
or
Manual

Detailed Comparison

Fastify
Fastify
Ktor
Ktor

Fastify is a web framework highly focused on speed and low overhead. It is inspired from Hapi and Express and as far as we know, it is one of the fastest web frameworks in town. Use Fastify can increase your throughput up to 100%.

It is a framework for building asynchronous servers and clients in connected systems using the Kotlin programming language.

100% asynchronous: all the core is implemented with asynchronous code, in this way not even a millisecond is wasted.;Highly performant: as far as we know, Fastify is one of the fastest web frameworks in town, depending on the code complexity we can serve up to 20000 request per second.;Extendible: Fastify is fully extensible via its hooks, plugins and decorators.;Schema based: even if it is not mandatory we recommend to use JSON Schema to validate your routes and serialize your outputs, internally Fastify compiles the schema in an highly performant function.;Logging: logs are extremely important but are costly; we chose the best logger to almost remove this cost, Pino!;Developer friendly: the framework is built to be very expressive and help the developer in his daily use, without sacrificing performance and security.
Unopinionated;Asynchronous;Testable
Statistics
GitHub Stars
34.9K
GitHub Stars
14.1K
GitHub Forks
2.5K
GitHub Forks
1.2K
Stacks
506
Stacks
173
Followers
523
Followers
339
Votes
95
Votes
27
Pros & Cons
Pros
  • 21
    Performance
  • 13
    Easy to use
  • 12
    Lightweight
  • 9
    Middleware
  • 9
    Open source
Cons
  • 1
    Small community
Pros
  • 9
    Simple & Small
  • 8
    Kotlin native
  • 7
    Light weight
  • 3
    High performance
Cons
  • 2
    Not self-explanatory: relies on Kotlin "magic"
  • 2
    Relatively fresh technology - not a lot of expertise
Integrations
Node.js
Node.js
Linux
Linux
Windows
Windows
IntelliJ IDEA
IntelliJ IDEA
Kotlin
Kotlin
macOS
macOS

What are some alternatives to Fastify, Ktor?

ExpressJS

ExpressJS

Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.

Django REST framework

Django REST framework

It is a powerful and flexible toolkit that makes it easy to build Web APIs.

Sails.js

Sails.js

Sails is designed to mimic the MVC pattern of frameworks like Ruby on Rails, but with support for the requirements of modern apps: data-driven APIs with scalable, service-oriented architecture.

Sinatra

Sinatra

Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.

Lumen

Lumen

Laravel Lumen is a stunningly fast PHP micro-framework for building web applications with expressive, elegant syntax. We believe development must be an enjoyable, creative experience to be truly fulfilling. Lumen attempts to take the pain out of development by easing common tasks used in the majority of web projects, such as routing, database abstraction, queueing, and caching.

Slim

Slim

Slim is easy to use for both beginners and professionals. Slim favors cleanliness over terseness and common cases over edge cases. Its interface is simple, intuitive, and extensively documented — both online and in the code itself.

Falcon

Falcon

Falcon is a minimalist WSGI library for building speedy web APIs and app backends. We like to think of Falcon as the Dieter Rams of web frameworks.

hapi

hapi

hapi is a simple to use configuration-centric framework with built-in support for input validation, caching, authentication, and other essential facilities for building web applications and services.

TypeORM

TypeORM

It supports both Active Record and Data Mapper patterns, unlike all other JavaScript ORMs currently in existence, which means you can write high quality, loosely coupled, scalable, maintainable applications the most productive way.

FeathersJS

FeathersJS

Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.

Related Comparisons

Bootstrap
Materialize

Bootstrap vs Materialize

Laravel
Django

Django vs Laravel vs Node.js

Bootstrap
Foundation

Bootstrap vs Foundation vs Material UI

Node.js
Spring Boot

Node.js vs Spring-Boot

Liquibase
Flyway

Flyway vs Liquibase