nowfound

Dev tools · October 28, 2025

JS20

Build TypeScript backends and SDKs with up to 90% less code. Faster, cheaper & easier to maintain. Ready for the AI era, less code = less tokens & reduced costs.

JS20 launched on October 28, 2025 with 12 votes, #913 of 8,178 launches that month and more than 75% of that year's launches.

Visit js20.dev ↗JS20 alternativestop 11% of October 2025

What it does

A new open-source TypeScript framework that let's you write up to 90% less code for backends & frontend SDKs. With Auth, ACL, Validation, DB synchronisation & much more. Ready for the AI era, less code means less tokens & reduced costs.

Build TypeScript backends and SDKs with up to less code . Faster, cheaper & easier to maintain. // Auth, ACL, Validation, Sanitation, // ORM & more out of the box app.addEndpoint({ path: '/car', method: 'POST', inputSchema: sCar, outputSchema: Schema.withInstance(sCar), isLoggedIn: true, run: async (system, input) => { return system.models.car.create(input); } }); Generates // Talk to API using generated async // functions (100% type-safe) const newCar = await createCar({ isLeased: false, registrationNumber: 'ABC123' }); console.log(newCar.id); Reduce code by up to • Generate the frontend SDK • Save time & cost on dev Opinionated in the right way JS20 makes Schemas , Models & Endpoints play…from js20.dev

Does a similar job

all alternatives →
  • 1 KB JavaScript library for building front end apps2017 · github.com · ▲242

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

  • Serverless Cloud2022 · serverless.com · ▲283

    Build full stack apps better and faster than everyone else

  • Lowdefy – Build internal tools with YAML on an open-source framework2021 · lowdefy.com · ▲107

    We're excited to announce Lowdefy V4, a full-stack web framework built on top of Next.js that simplifies building web applications, internal tools, admin panels, BI dashboards, and CRUD apps using YAML or JSON configuration files. New in V4: Next.js: Lowdefy now runs on top of the Next.js framework. All of Auth.js: App auth is now handled by Auth.js supported providers, adapters and callbacks and events, easy to configure, but all of which can be customized. Plugin extensibility: Apps can now be extended with any npm or pnpm workspace plugins. Our story: We have developed a simple…

  • Typebase – A single-folder back end you write in TypeScriptAug 2026 · typebase.io · ▲119

    Hey HN! I built Typebase, a library that gives you Convex's DX with Supabase's openness. After trying Supabase I liked how fast it is to spin up a DB and auth, but really didn't like using RLS and SQL for authorization. With Convex I loved how your server "lives" in your code, but disliked the DB model and the realtime-first defaults. With Typebase you just write TS files inside a typebase/ folder in your existing repo. You can define your DB tables inside a schema.ts file and export server functions that your frontend calls like local functions, fully typed. Auth is built in. Then one…

  • An opinionated and statically-typed TypeScript SDK generator2022 · easysdk.xyz · ▲81

    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,…

  • Turn OpenAPI to Universal TypeScript SDKs2024 · speakeasyapi.dev · ▲27

    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…

More dev tools this month

the category →
  • /dev/null▲487

    a social network for devs

    Dev tools · 3d ago · dev-null.sh

  • open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

    Dev tools · 28d ago · github.com

  • Contribute to reladraw/reladraw development by creating an account on GitHub.

    Dev tools · 26d ago · github.com

  • OpenBot▲362

    Grok Bot alternative: free, local, open-source, multiplayer

    Dev tools · 23d ago · openbot.run

  • Talanoa▲346

    Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

    Dev tools · 21d ago · talanoa.email

  • CoreSpeed▲332

    One MCP for everything your agents need: apps, memory, tools

    Dev tools · 28d ago · corespeed.io

Source: Product Hunt launch ↗

Launched alongside, October 2025

the whole month →
  • Our first coding model and new interface for agents

    AI · Oct 2025 · cursor.com

  • Flask▲806

    Notion + Loom, for video collaboration.

    AI · 2025 · flask.do

  • I went down the rabbit hole on a side project and ended up building this: Strange Attractors(https://blog.shashanktomar.com/posts/strange-attractors). It’s built with three.js. Working on it reminded me of the little "maths for fun" exercises I used to do while learning programming in early days. Just trying things out, getting fascinated and geeky, and being surprised by the results. I spent way too much time on this, but it was extreme fun. My favorite part: someone pointed me to the Simone Attractor on Threads. It is a 2D attractor and I asked GPT to extrapolate it to…

    AI · Oct 2025 · blog.shashanktomar.com

  • Orchestra▲793

    A chat-centric workspace for builders and modern teams

    Work · 2025 · orch.so

  • Hey all, I built this. It’s not trying to capture every autistic experience (that’d be impossible). It’s based on my own lived experience as well as that of friends on the spectrum. I'm trying to give people a feel for what masking, decision fatigue, and burnout can look like day-to-day. That’s hard to explain in words, but easier to show through choices and stats. I'm not trying to "define autism". I’ve gotten good feedback here about resilience, meds, and difficulty tuning. I’ll keep tweaking it. If even a few people walk away thinking, "ah, maybe that’s why my coworker struggles in those…

    Life & fun · 2025 · autism-simulator.vercel.app

  • Director▲768

    Lovable for web automation

    AI · 2025 · director.ai