Alternatives

Products that do what Javalin REST Library – Rewritten in Kotlin does

1. 1JA
   Javalin, a Java/Kotlin REST API Framework▲50

   2017 · javalin.io

2. 2J1
   Javalin 1.0 – A Kotlin/Java web framework▲271

   2017 · javalin.io

3. 3MK
   My Kotlin/Java REST Library Javalin Reaches v0.4.0 (CORS, Uploads, ++)▲11

   2017 · javalin.io

4. 4RL
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   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

5. 5ER
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   2017 · github.com

6. 6HS
   Http4k: Server as a Function. In Kotlin. Typesafe. Without the Server▲29

   2017 · http4k.org

7. 7LE
   Leptus – Erlang REST framework that runs on top of Cowboy web server▲73

   2018 · github.com

8. 8RI
   Restful.io – a curated list of resources for API developers▲18

   2015 · restful.io

9. 9KA
   Kweb, a Kotlin web framework based on the observer pattern▲5

   2019 · docs.kweb.io

10. 10MA
    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

    Sep 2025 · github.com

11. 11EA
    EvoMaster – Automated Test Generation for Java/Kotlin RESTful APIs▲5

    2020 · github.com

12. 12AF
    A foursquare client written entirely in kotlin▲6

    2016 · github.com

13. 13KA
    Ktfmt, a Kotlin code formatter powered by Google-Java-format▲5

    2019 · github.com

14. 14KM
    Kiel – Minimalist Kotlin DSL for RecyclerView.Adapter▲18

    2020 · github.com

15. 15RA
    REST API generator for popular programming languages▲8

    2017 · restdb.io

16. 16KA
    KReact, a Kotlin Redux-like framework for application state management▲7

    2023 · github.com

17. 17SA
    Sondra – A Different ORM and REST Framework for Flask and RethinkDB▲21

    2015 · github.com

18. 18JI
    JSDB.io - A collection of the best JS libraries for front-end dev▲8

    2013 · jsdb.io

19. 19RC
    RESTUnited.com – Automated SDK Generation for REST API▲10

    2014 · restunited.com

20. 20SR
    Sumo_rest – The easiest way to build RESTful API servers in #Erlang▲7

    2015 · github.com

21. 21IJ
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    Feb 2026 · javalin.io

22. 22CI
    Cantrip – instant yet flexible REST API that binds to a JSON file▲7

    2015 · kriek.co.uk

23. 23RC
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    2017 · github.com

24. 24LA
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    2020 · adsharma.github.io

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