Open source
Sinatra
Lightweight Ruby framework for building web apps and APIs
Backend FrameworksTiny Ruby DSL framework
Alternatives to Flask
12 tools like Flask, chosen by what they do. About Flask
Open source
Open source
Vapor
Server-side Swift framework for APIs, backends and websites
Backend FrameworksServer-side Swift framework
Open source
Open source
Hanami
Ruby web framework with separated concerns and a data layer
Backend FrameworksModern Ruby web framework
Open source
Litestar
Typed Python ASGI framework with automatic OpenAPI docs
Backend FrameworksFast typed Python ASGI
Open source
Open source
Ktor
Kotlin framework for async servers and HTTP clients
Backend FrameworksKotlin async server framework
Curated
Open source
ASP.NET Core
Open source web framework for C# apps, APIs and interactive pages
Backend FrameworksMicrosoft's web framework
Open source
Elysia
TypeScript framework for Bun with end-to-end type safety
Backend FrameworksErgonomic Bun framework
Open source
Micronaut
JVM microservice framework with compile-time dependency injection
Backend FrameworksJVM microservice framework