Work · alternatives · 2026

24 alternatives to Javalin REST Library – Rewritten in Kotlin

Javalin release notes, announcements, and changelog.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Javalin REST Library – Rewritten in Kotlin launched in 2017; newer entries below may have overtaken it.

1. 1
   Javalin 1.0 – A Kotlin/Java web framework▲271

   2017 · javalin.io · its alternatives →

2. 2
   Javalin, a Java/Kotlin REST API Framework▲50

   Javalin - A lightweight Java and Kotlin web framework. Create REST APIs in Java or Kotlin easily.

   2017 · javalin.io · its alternatives →

3. 3
   I finished v5 of a JVM framework I've spent spent half a decade making▲377

   ForewordJavalin is a Java and Kotlin web framework which focuses on simplicity and Java/Kotlin interoperability.It supports WebSockets and HTTP3, and it uses...

   2022 · javalin.io · its alternatives →

4. 4
   My Kotlin/Java REST Library Javalin Reaches v0.4.0 (CORS, Uploads, ++)▲11

   CORSJavalin 0.4.0 adds built-in CORS support with app.enableCorsForOrigin(

   2017 · javalin.io · its alternatives →

5. 5
   Restate – Low-latency durable workflows for JavaScript/Java, in Rust▲185

   We'd love to share our work with you: Restate, a system for workflows-as-code (durable execution). With SDKs in JS/Java/Kotlin and a lightweight runtime built in Rust/Tokio. https://github.com/restatedev/ https://restate.dev/ It is free and open, SDKs are MIT-licensed, runtime permissive BSL (basically just the minimal Amazon defense). We worked on that for a bit over a year. A few points I think are worth mentioning: - Restate's runtime is a single binary, self-contained, no dependencies aside from a durable disk. It contains basically a…

   2024 · restate.dev · its alternatives →

6. 6
   1 KB JavaScript library for building front end apps▲242

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

7. 7
   My first open-source project release – RandomJson▲56

   Provides a Kotlin/Java library to create a random json string - mangatmodi/RandomJson

   2019 · github.com · its alternatives →

8. 8
   Kneden – Transpile ES7 Async/await to ES6 Promise Chains (Babel Plugin)▲76

   Transpile ES2017 async/await to vanilla ES6 Promise chains: a Babel plugin - babel/kneden

   2016 · github.com · its alternatives →

9. 9
   js.spec, a JavaScript implementation of clojure.spec▲96

   clojure.spec for Javascript. Contribute to prayerslayer/js.spec development by creating an account on GitHub.

   2016 · github.com · its alternatives →

10. 10
    Http4k: Server as a Function. In Kotlin. Typesafe. Without the Server▲29

    An overview of the Kotlin

    2017 · http4k.org · its alternatives →

11. 11
    Videobug▲104

    The 10x debugger for your Java, Kotlin, and Scala

    2022 · its alternatives →

12. 12
    6to5 – Turn ES6 code into vanilla ES5 with source maps and no runtime▲48

    🐠 Babel is a compiler for writing next generation JavaScript. - babel/babel

    2014 · github.com · its alternatives →

13. 13
    Live updates of RESTful resources▲9

    JavaScript library for receiving live updates of web resources - liveresource/liveresource-client

    2014 · github.com · its alternatives →

14. 14
    Mosaic – A Kotlin framework for cleaner back end code▲25

    Backend APIs often grow into large orchestration classes full of duplicated calls and manual concurrency. I’ve been working on Mosaic, a Kotlin framework that composes responses out of small, request-scoped “tiles.” Each tile runs once per request, dependencies resolve automatically, and independent tiles execute in parallel without boilerplate. It’s still early (v0.2.0), but working today for caching, concurrency, and testability. Curious to hear feedback on the approach. GitHub: https://github.com/Nick-Abbott/Mosaic Maven Central: org.buildmosaic:mosaic-core:0.2.0

    2025 · github.com · its alternatives →

15. 15
    KReact, a Kotlin Redux-like framework for application state management▲7

    This library provides a Redux-like implementation in pure Kotlin and coroutines. - kreact/kreact

    2023 · github.com · its alternatives →

16. 16
    Kore▲7

    Rethink your datapack development experience with Kore.

    2025 · kore.ayfri.com · its alternatives →

17. 17JE
    JavaScript, ES6, ES7, ES10 Where Are We?▲33

    2019 · medium.com · its alternatives →

18. 18
    Report: State of the Kotlin ecosystem▲10

    Results from a survey of 2,744 Kotlin developers

    2018 · pusher.com · its alternatives →

19. 19SJ
    Search JavaScript libraries▲31

    2017 · li458-246.members.linode.com · its alternatives →

20. 20
    Kotlin 1.0▲6

    Pragmatic programming language for JVM and Android

    2016 · blog.jetbrains.com · its alternatives →

21. 21
    https://github.com/Mindinventory/Flutlin▲6

    Flutter + Kotlin (Flutlin)

    2022 · github.com · its alternatives →

22. 22
    Stream.js – Object Streaming Pipeline Inspired by Java 8 Streams▲5

    Lazy Object Streaming Pipeline for JavaScript. Contribute to winterbe/streamjs development by creating an account on GitHub.

    2015 · github.com · its alternatives →

23. 23
    Swiftlin▲7

    Convert Swift code to Kotlin with 1 click

    2023 · its alternatives →

24. 24
    JavaScript server-sent events library▲7

    Server-Sent Events for JavaScript. Contribute to fanout/js-eventstream development by creating an account on GitHub.

    2020 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →