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Dev tools · alternatives · 2026

24 alternatives to SDKgen

A SDK code generator to build client SDKs for your REST API

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SDKgen launched in 2022; newer entries below may have overtaken it.

  1. 1
    liblab▲446

    Generate better SDKs for your API

    2024 · liblab.com · its alternatives →

  2. 2
    Konfig▲87

    Generate SDKs, docs, demos & tutorials for your REST API

    2023 · konfigthis.com · its alternatives →

  3. 3
    Konfig▲87

    Generate SDKs to easily onboard external devs to your API

    2023 · konfigthis.com · its alternatives →

  4. 4

    Hi Hacker News! Patrick and Elias here. We built an SDK / Documentation generator for REST APIs. The link included shows the shiny output of our system: the docs! We generated 5 SDKs and docs from the Hacker News OpenAPI we found on GitHub. If you write code in Python, Typescript, Go, Ruby, or Rust, we’d love for you to try an SDK out! If you want to generate SDKs for your own API try our tool here: https://github.com/Sideko-Inc/sideko We are both software engineers, and we built this tool because we were spending too much time writing API integrations, supporting…

    2023 · hacker-news.sideko.dev · its alternatives →

  5. 5

    Generate custom data & API to build apps in less than 30s

    2021 · retool.com · its alternatives →

  6. 6

    Generate SDKS and documentation in one click

    2018 · apimatic.io · its alternatives →

  7. 7
    Fastgen▲691

    Visual low-code backend builder

    2023 · its alternatives →

  8. 8

    Hi HN, I’m Patrick. Elias, Kevin, and I are building Sideko (https://sideko.dev), a new type of code generator for building and maintaining API client SDKs from OpenAPI specs. Traditional SDK generators rely on static templates that produce rigid, machine-generated code. When the API changes, these generators completely overwrite the SDK, destroying any custom modifications developers have made. The result is brittle code that looks artificial and requires constant manual rework. Our approach uses structured pattern matching queries instead of templates. These queries analyze the…

    2025 · github.com · its alternatives →

  9. 9

    Auto-generate API clients, server stubs, docs for REST APIs

    2017 · github.com · its alternatives →

  10. 10
    Fern▲260

    We built the world’s first generated, idiomatic gRPC and REST SDK. If you have public gRPC and REST endpoints, Fern is the SDK provider for you.

    2025 · buildwithfern.com · its alternatives →

  11. 11RC
  12. 12
    Keygen▲252

    A dead-simple software licensing API built for developers

    2016 · keygen.sh · its alternatives →

  13. 13

    Turn AI ideas into working apps in seconds

    2024 · anotherwrapper.com · its alternatives →

  14. 14

    API design studio for product managers

    2023 · conektto.io · its alternatives →

  15. 15
    APIGen▲3

    Create and deploy custom APIs in minutes.

    2024 · its alternatives →

  16. 16

    Generate and share OpenAPI specs with AI

    2025 · api.dev · its alternatives →

  17. 17

    Keygen is a powerful software licensing API for desktop apps, on-premise software and other software products written in Go, Rust, JS, C/C++, C#, Swift, Java, Kotlin and more.

    2017 · keygen.sh · its alternatives →

  18. 18

    A Notion API SDK, written in Golang. Contribute to jomei/notionapi development by creating an account on GitHub.

    2021 · github.com · its alternatives →

  19. 19

    Hi Hacker News! My name is Sagar, I’m working on a startup called Speakeasy - we’re making all APIs self-service. The platform is currently in beta, but we’re independently launching this tool which you can use to generate language-idiomatic, statically-typed TS SDKs from any public OpenAPI schemas. We hope to continue iterating on this to give devs a way to easily generate high fidelity client SDKs for all the major languages. Inspiration for this product is from past experiences struggling with OpenAPI. I was originally optimistic about using the OpenAPI tools to build out our offering,…

    2022 · easysdk.xyz · its alternatives →

  20. 20

    Handwritten SDKs generated from OpenAPI

    2024 · speakeasy.com · its alternatives →

  21. 21

    Really good SDKs from OpenAPI

    2025 · sideko.dev · its alternatives →

  22. 22
    Borea▲25

    An open source SDK generator for complex SDKS

    2025 · its alternatives →

  23. 23

    Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs

    2019 · github.com · its alternatives →

  24. 24
    BackAnt▲93

    Your browser-based Software Developer

    2025 · its alternatives →

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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 →