What's the state of server-side frameworks with Kotlin support today for small teams?

This page summarizes the projects mentioned and recommended in the original post on /r/Kotlin

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  • Vert.x

    Vert.x is a tool-kit for building reactive applications on the JVM

    Personally, I like vertx, it is modular and you can pick and choose what you need. It also has support for kotlin coroutines, https://vertx.io/, https://github.com/vert-x3/vertx-examples/tree/4.x/kotlin-examples

  • vertx-examples

    Vert.x examples

    Personally, I like vertx, it is modular and you can pick and choose what you need. It also has support for kotlin coroutines, https://vertx.io/, https://github.com/vert-x3/vertx-examples/tree/4.x/kotlin-examples

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  • spring-kotlin-functional

    Spring Framework Kotlin APIs, the functional way

    A potential good tradeoff could be using Spring the functional way with the Kotlin web DSL. Should be pretty lightweight. See https://github.com/sdeleuze/spring-kotlin-functional that I updated recently.

  • http4k

    The Functional toolkit for Kotlin HTTP applications. http4k provides a simple and uniform way to serve, consume, and test HTTP services.

    You named Express as an example for a good framework - I'd say both http4k and ktor come close to it. Spring Boot would really be on the other end and I met lots of JS/TS devs that didn't even want to touch it. I did have the same impression than you though: Documentation for ktor is not great at all.

  • initializr

    A quickstart generator for Spring projects

    Yes, start.spring.io is a great way to get started, but I was actually referring to things like kotlin-allopen for Spring annotated components, kotlin-noargs if you are using JPA, adding the Kotlin module if you use Jackson object mappers, etc. What you add is going to depend on what features you are using, so start.spring.io won't be able to automatically add everything for you, especially if you add that feature later on, and because some of those modules are optional and a matter of preference.

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    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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