Dev tools · alternatives · 2026

24 alternatives to APIGen

Create and deploy custom APIs in minutes.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. APIGen launched in 2024; newer entries below may have overtaken it.

1. 1
   Mock API Generator▲555

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

   2021 · retool.com · its alternatives →

2. 2
   create-api.dev by Kong▲150

   Generate and share OpenAPI specs with AI

   2025 · api.dev · its alternatives →

3. 3
   OpenAPI DevTools – Chrome extension that generates an API spec▲811

   Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.

   2023 · github.com · its alternatives →

4. 4
   Keygen▲252

   A dead-simple software licensing API built for developers

   2016 · keygen.sh · its alternatives →

5. 5
   Apidog▲570

   Development teams often struggle with using multiple tools like Postman and Swagger for API design, development, and testing. This fragmented approach leads to outdated API specs and chaotic collaboration. So we built Apidog: a single, unified API platform for team collaboration. It has a beautiful interface that makes it easy to create API spec, generate request data from API spec, validate responses, create mock data, orchestrate test scenarios, and publish API documentation. Apidog = Postman + Swagger + Mock + JMeter.

   2024 · apidog.com · its alternatives →

6. 6
   Developer Experience Portal▲98

   Generate SDKS and documentation in one click

   2018 · apimatic.io · its alternatives →

7. 7
   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 →

8. 8
   Simple API Generator (Rest + GraphQL)▲121

   Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs

   2019 · github.com · its alternatives →

9. 9
   Keygen – A dead-simple software licensing API built for developers▲190

   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 →

10. 10
    Cursor for your API▲473

    Generate, edit, lint & test your API workflow in one place

    2025 · app.getelva.ai · its alternatives →

11. 11
    API Template▲118

    Generate images and PDFs with simple API

    2021 · apitemplate.io · its alternatives →

12. 12
    A faster way to prototype your APIs using OpenAPI 3 and Swagger UI▲77

    A generator for OpenAPI 3. Contribute to egorsmkv/openapi3-generator development by creating an account on GitHub.

    2020 · github.com · its alternatives →

13. 13
    DEV APIs▲320

    Powerful APIs to help grow your business

    2021 · nocodeapi.com · its alternatives →

14. 14
    Swagger Codegen▲29

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

    2017 · github.com · its alternatives →

15. 15
    XgeneCloud – Instant REST and GraphQL APIs on Any SQL Database▲103

    2020 · github.com · its alternatives →

16. 16
    apiJuice▲223

    Create a hosted API for anything in seconds

    2025 · apijuice.com · its alternatives →

17. 17TA
    TypeAPI – An OpenAPI alternative optimized for code generation▲55

    An OpenAPI alternative to describe REST APIs for type-safe code generation.

    2023 · typeapi.org · its alternatives →

18. 18RI
    ReadMe.io – Beautiful Documentation Made Easy▲266

    ReadMe helps you create beautiful, interactive API documentation that developers love.

    2014 · readme.io · its alternatives →

19. 19
    UIGen – Production UI from any API spec with full override control▲49

    Runtime-rendered UI for web, IoT, and embedded systems. Zero codegen - darula-hpp/uigen

    May 2026 · github.com · its alternatives →

20. 20
    Conektto API-First Design Studio▲157

    API design studio for product managers

    2023 · conektto.io · its alternatives →

21. 21
    InstaAPI▲104

    Low-code API builder

    2023 · its alternatives →

22. 22
    Hello API▲187

    Turn your boring API docs into an interactive playground

    2024 · helloapi.co · its alternatives →

23. 23
    Apisentris▲86

    Instantly build APIs in seconds from your database schema

    2018 · its alternatives →

24. 24
    ApiHome▲73

    Home of API testing

    2022 · apihome.io · 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 →