April 5, 20264 min readUpdated September 14, 2026

Best Tech Stack for Hackathons in 2026: Tools That Win Prizes

The best tech stack for hackathons is the one your team already knows. If you don't have one yet, this is the Next.js, FastAPI, and Supabase default I use.

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The Default Stack, In One Glance

After 50+ hackathons, this is the default stack I reach for and recommend to teams I mentor.

Frontend

Next.js 16 + Tailwind CSS + shadcn/ui

Backend

Python FastAPI, or Next.js API routes if you want one language

Database & Auth

Supabase or Firebase (both set up in under 10 minutes)

Deployment

Vercel for the frontend, Railway for the backend

OpenAI or Claude API, plus whatever the sponsor wants

Use what your team knows

If you're going for the win and your team is faster in something else, use that instead. The goal is a polished, deployed demo in 24-48 hours, and a team that writes Vue shouldn't spend those hours learning React.

Frontend: Next.js

I default to Next.js with React. Each page is just a file, and server rendering is built in. For UI, shadcn/ui copies ready-made components into your project as code you can edit.

terminal

bash

npx create-next-app@latest my-hackathon-app
cd my-hackathon-app
npx shadcn@latest init
npm run dev

Do This

Next.js + Tailwind CSS + shadcn/ui (my default)
Vite + React for a pure single-page app
Svelte or SvelteKit if your team already knows it

Avoid This

✕Angular: too much boilerplate for 24 hours
✕Complex monorepo setups
✕Learning a brand-new framework mid-event

Backend: Python or Node, Nothing Exotic

Pick Python (FastAPI or Flask) or Node.js (Express). Python fits AI and ML work better because of its libraries. Node makes sense when your frontend is already JavaScript and you want one language.

main.py

python

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI()
app.add_middleware(CORSMiddleware, allow_origins=["*"])

@app.get("/api/health")
def health():
    return {"status": "ready to hack"}

Pro Tip

If your backend is a few simple endpoints, serverless functions on Vercel or AWS Lambda mean no server to manage. For anything heavier, run FastAPI on Railway or Render, which both do one-click deploys.

Database and Auth: Firebase or Supabase

Both come with sign-up and login built in. Pick between them by how you want to store data.

Do This

Firebase for NoSQL and real-time features
Supabase for PostgreSQL and SQL
Free tiers that cover a typical hackathon

Avoid This

✕Self-hosted databases (too much setup time)
✕Complex ORM configurations
✕Rolling your own auth from scratch
✕A database without built-in auth, if your app needs logins

All of this assumes you're there to win. If you're there to learn, a new tool can be worth the whole weekend. At LA Hacks 2023 I spent the hackathon learning vector databases for a RAG-style chat app, and we didn't win. I posted about it on LinkedIn anyway, and that post led to my first internship. The vector database knowledge also landed me a full-time job.

AI APIs: Read the Docs Before You Arrive

Pick one model provider and make a test call to its API before you arrive. Keys and rate limits are easier to sort out at home.

GPT-4o

OpenAI

Claude 4

Anthropic

Gemini

Google

Groq

Fast Inference

Read sponsor docs early

If you're going for sponsor prizes, check the sponsor list and read their API docs before the event starts too.

Deployment: Ship a Live URL

Deploy so judges can open a real URL instead of watching localhost on your laptop. It's one command.

terminal

bash

# Frontend to Vercel
npx vercel deploy

# Full-stack to Railway
railway up

Watch Out

For mobile, use Expo for React Native and test on your phone with a QR code. For hardware, record a working video demo as a backup in case the live hardware fails.

Record the Demo Video

The demo video keeps working after you leave the table: judges revisit submissions during deliberation, and recruiters can find it on YouTube. Lock the tools fast so the weekend goes to building, then put your last hours into the video.

Do This