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Dev tools · alternatives · 2026

24 alternatives to RecipeUI

Open source type-safe Postman alternative

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. RecipeUI launched in 2023; newer entries below may have overtaken it.

  1. 1OS

    Hello! This is Jeane and Samuel and we’re building RecipeUI. RecipeUI is an open source Postman alternative that uses TypeScript to statically type and autocomplete requests. We built this because current API tools don’t deal with the fact that some APIs are just painful to work with. For us, it’s usually error after error as we try to figure out how to properly form the first request. We recorded a demo to show you how TypeScript helps us autocomplete a request correctly. https://youtu.be/O_Mly_p-g5s How does our platform improve the developer experience? The analogy is…

    2023 · recipeui.com · its alternatives →

  2. 2

    The easiest way to generate beautiful UIs

    2025 · heroui.chat · its alternatives →

  3. 3
    OpenUI▲543

    Describe UI and see it rendered live

    2024 · github.com · its alternatives →

  4. 4
    OpenUI▲322

    Thesys just open-sourced their generative UI rendering engine. Interesting timing given where Google a2ui and Vercel's json-render are headed. The difference worth noting: a2ui and json-render both treat JSONL as the contract between the LLM and the renderer. Thesys is betting that's the wrong primitive. Their engine uses a code-like syntax (OpenUI Lang) instead — LLM writes it, renderer executes it. The argument is that LLMs are fundamentally better at generating code than generating structured data, so you get cleaner output and ~67% fewer tokens. The broader vision seems to be a…

    Mar 2026 · openui.com · its alternatives →

  5. 5

    Hey everyone, We have been building SecureAI Tools -- an open-source application layer for ChatGPT and ChatPDF-like AI tools. It works with locally running LLMs as well as with OpenAI-compatible APIs. For local LLMs, it supports Ollama which supports all the gguf/ggml models. Currently, it has two features: Chat-with-LLM, and Chat-with-PDFs. It is optimized for self-hosting use cases and comes with basic user management features. Here are some quick demos: * Chat with documents using OpenAI's GPT3.5 model: https://www.youtube.com/watch?v=Br2D3G9O47s * Chat with documents…

    2023 · github.com · its alternatives →

  6. 6
    ApiHome▲73

    Home of API testing

    2022 · apihome.io · its alternatives →

  7. 7
    A2UI▲250

    A safe way for AI to build UIs your app can render

    Dec 2025 · a2ui.org · its alternatives →

  8. 8

    Biggest Library of ready-made API Collections for Postman

    2018 · bubble.io · its alternatives →

  9. 9

    Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs

    2019 · github.com · its alternatives →

  10. 10
    pdfme▲106

    Open source PDF library fully written in TypeScript

    2022 · pdfme.com · its alternatives →

  11. 11

    Hey there HN! I just wrapped up an all-day documentation spree for Instant API, a JavaScript framework for easily building web APIs that implements type safety at the HTTP interface. It uses a function-as-a-service approach combined with a slightly modified JSDoc spec to automatically enforce parameter and schema validation before HTTP requests make it through to your code. You just write comments above your endpoint functions and voila, enforced type safety contracts between your API endpoints and your developers. OpenAPI specifications are generated automatically as a byproduct of simply…

    2023 · github.com · its alternatives →

  12. 12

    GraphQL APIs in TypeScript with complete e2e type safety

    2021 · uniform-graphql.whatsgood.dog · its alternatives →

  13. 13TA

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

    2023 · typeapi.org · its alternatives →

  14. 14

    Modern, open-source, AI content moderation

    2024 · openmoderator.com · its alternatives →

  15. 15

    Types generator will auto generate TS Interfaces from JSON

    2022 · vineethtrv.github.io · its alternatives →

  16. 16
    TypeORM▲81

    Node.js ORM written in TypeScript

    2017 · github.com · its alternatives →

  17. 17

    Generate beautiful, typesafe code from data

    2018 · quicktype.io · its alternatives →

  18. 18

    Introducing the Code ChatGPT Plugin - a new era of seamless interaction between ChatGPT and your codebase. This TypeScript Code Analyzer furnishes a suite of utilities to analyze TypeScript code, enabling ChatGPT to "talk" with YOUR code. Fetch a list of all the files in your project, list of every function in a TypeScript or JavaScript file, or even get the content of a specific function, all while staying in your conversation with ChatGPT. With accessible API endpoints, you can effortlessly navigate your codebase and ask ChatGPT anything you can think of about it. Say goodbye to the days…

    2023 · github.com · its alternatives →

  19. 19

    Hi HN! We’re excited to share our new code generator that lets you ship high-quality TypeScript SDKs, that your users will love, from your OpenAPI documents. Our ongoing goal is to help you build one SDK that runs anywhere modern JavaScript runs. This includes new runtimes like Deno and Bun in addition to the ever-popular Node.js. Additionally, the popularity of AI has meant server-sent events and file streaming are also commonplace - we wanted to cover these use cases too. This explosion in new runtimes and ways of interacting with APIs shifts cognitive burden on API developers often having…

    2024 · speakeasyapi.dev · its alternatives →

  20. 20

    Hi HN, I'm excited to finally launch this project. While existing tools like Postman excel at API discovery and testing, they often require us to navigate complex interfaces, manually construct requests, etc. That's why I created OpenAstra. The core idea is to combine the visual richness of traditional API tools with the simplicity of a chat interface. Think of it as "Postman meets ChatGPT" - allowing us to interact with APIs through natural conversation while retaining core essential features of traditional API tools. If you want to test an endpoint or understand what it does? Just ask. The…

    2025 · github.com · its alternatives →

  21. 21AM

    I made an open source, MIT license Typescript library based on some of the latest research that generates prompt injection attacks. It is a super minimal/lightweight and designed to be super easy to use. Keen to hear your thoughts and please be responsible and only pen test systems where you have permission to pen test!

    2025 · prompt-injector.blueprintlab.io · its alternatives →

  22. 22

    Auto-generate TypeScript types from your Spring Boot project

    Nov 2025 · thomasberrens.gumroad.com · its alternatives →

  23. 23
    pluv.io▲26

    Open source multiplayer APIs, powered by TypeScript

    2025 · pluv.io · its alternatives →

  24. 24

    We built an open-source tool that scans your codebase and generates OpenAPI docs in minutes. Right now it supports Rails, Go, Python, and NodeJS frameworks, and we will keep adding more. It picks up routes, params, request bodies, and models directly from the code and outputs a clean OpenAPI spec you can drop into your workflow.

    Nov 2025 · github.com · 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 →