Every "free tools" listicle on the internet follows the same script: 40 tools, half demand a credit card upfront, a third turn out to be 7-day trials wearing a "free tier" costume, and the rest are so gutted they're useless. I've been dumpster-diving through these lists for years. Most of them belong in the dumpster. 🗑️

But here's the thing — as of March 2026, you can genuinely build and ship a real product without spending a dollar. Not a toy. Not a demo. A product with users, authentication, a database, AI features, email, analytics, and automated deployment. I went through every tool on this list, read the actual terms (not the marketing page), and tested most of them myself.

This guide is the result. Let's build a startup for $0.

The rules

For a tool to make this list, it had to pass four filters:

  1. No credit card required to get started
  2. The free tier is actually usable — not a crippled demo
  3. It doesn't expire — no 7-day or 14-day trials
  4. It actually works — I tested it myself, or strong developer consensus vouches for it

I cut anything that failed even one rule. Let's go.

AI coding and development

AI coding tools — software that uses LLMs (large language models — the "brains" behind ChatGPT, Claude, and Gemini) to help you write code, catch bugs, and build faster.

Claude Code (via API — a way for programs to talk to each other). You get a $5 credit on signup. It's a terminal-based AI agent that reads your entire codebase, writes code, and runs commands. On the cheaper Haiku model, that $5 can last weeks to months of real work.

GitHub Copilot Free gives you 2,000 inline code completions plus 50 chat messages per month. Works inside VS Code, JetBrains, and Neovim — the most popular code editors. Enough for light daily coding and learning how AI-assisted development feels.

Cursor (Hobby tier) is a fork of VS Code — same editor, but Cursor rebuilt it with AI baked in. You get limited completions and chat, plus access to Composer, its agent mode that can make edits across multiple files. Good for trying the tool on light projects.

Windsurf (Free tier) gives you 5 Cascade sessions per day — Cascade is their agentic workflow engine that chains multiple AI actions together — plus unlimited Tab completions. Solid for daily coding with some AI agent support.

Cline is fully open source. It's an agentic coding extension for VS Code that creates files, runs commands, and edits across your project. The catch: you bring your own API key (your own account with an AI provider). If you have API credits from any of the free tiers above, Cline is unlimited.

Continue.dev — another fully open-source AI coding assistant. It understands your full project structure and works with any model you point it at. Bring your own API key, get full development workflows.

Backend and database

The backend is the server-side part of your app — where data lives, where logic runs, where users log in. A database stores that data.

Supabase (Free tier) is the big one here. You get 2 projects, 500 MB of PostgreSQL database (an industry-standard database), 1 GB file storage, authentication for 50,000 monthly active users, and 500,000 edge function invocations (small server-side scripts that run close to your users). That's a full MVP backend. Gotcha: projects pause after 7 days of inactivity. Keep a weekly ping running.

PocketBase is fully free, open source, and ships as a single file you can run anywhere. It gives you a SQLite database, authentication, real-time updates, file storage, and an admin UI — all in one binary. If you don't need horizontal scaling (running on multiple servers), this is absurdly powerful for zero dollars.

Neon (Free tier) offers serverless PostgreSQL — a database that spins up and down automatically based on usage. You get 0.5 GB of storage and 190 compute hours per month. The killer feature: database branching, like Git for your database. Great for development and small production apps.

Turso (Free tier) is distributed SQLite at the edge — 9 GB of storage, 500 databases, and 25 million row reads per month. That's serious production capacity for anything that benefits from data being physically close to users.

Frontend and deployment

The frontend is what users see and interact with. Deployment is how your code goes from your laptop to the internet.

Vercel (Hobby plan) gives you 100 GB of bandwidth, serverless functions (code that runs on-demand without managing servers), edge functions, and automatic HTTPS (encrypted connections). Deploy Next.js, React, or any static site with zero configuration. This is production-grade hosting.

Cloudflare Pages + Workers — unlimited static site hosting, 100,000 worker requests per day (small scripts running at the network edge), 1 GB of KV storage (a simple key-value database), and 10 GB of R2 object storage. Full production deployment for most apps, free.

Netlify (Free tier) offers 100 GB bandwidth, 300 build minutes per month, and serverless functions. Best for static sites, documentation, and marketing pages.

v0 by Vercel gives you $5 in monthly credits and 7 messages per day. Describe a UI component in plain English, get working React code back. Not a full development tool, but excellent for prototyping and getting designs started fast.

AI APIs and models

AI APIs — services that let your app send text (or images) to an AI model and get a response back, like adding a brain to your product.

Google Gemini API (Free tier) offers 15 requests per minute and 1 million tokens per minute (tokens are word-chunks that AI reads — roughly ¾ of an English word) for Gemini Flash. Generous enough for development and light production workloads.

Groq (Free tier) provides rate-limited access to open-source models like Llama and Gemma. The selling point: speed. Groq runs inference (the process of an AI generating a response) on custom hardware that's significantly faster than standard GPUs. Good for prototyping and non-latency-critical production.

Ollama is completely free. It runs LLMs directly on your own computer — Llama 3, Mistral, Phi, CodeLlama, and dozens more. You need at least 16 GB of RAM (32 GB recommended). No API calls, no rate limits, no data leaving your machine.

Hugging Face (Free tier) gives you access to 500,000+ models, dataset hosting, a rate-limited inference API, and Spaces for hosting demos. The GitHub of machine learning.

DevOps and infrastructure

DevOps (development + operations) — the practice of automating how code gets tested, built, and deployed. Infrastructure is the servers your code runs on.

GitHub Actions (Free tier) gives you 2,000 minutes per month of CI/CD — continuous integration and continuous deployment, meaning GitHub automatically tests and ships your code every time you push changes. Enough for a full pipeline for a small team.

Oracle Cloud Free Tier is the hidden gem. You get 2 AMD virtual machines (1 GB RAM each) plus 4 Arm-based VMs with 24 GB of RAM total — always free, not a trial. That's real servers with full root access for hosting backends, databases, and cron jobs (scheduled tasks). Gotcha: Oracle frequently rejects signups. Keep trying.

Fly.io (Free tier) gives you 3 shared VMs and 160 GB of bandwidth. Deploy Docker containers (packaged applications that run anywhere) globally. Enough for a small backend or API.

Coolify is a fully open-source, self-hosted alternative to Heroku, Vercel, and Netlify. Deploy anything with a Dockerfile to your own server. Even a $4/month VPS works — but if you score an Oracle Cloud instance, Coolify on top of it is pure $0.

Auth and email

Auth (authentication) — verifying that users are who they say they are. The login/signup part of your app.

Clerk (Free tier) supports 10,000 monthly active users with social login, MFA (multi-factor authentication — that second code you get via text or an app), and a user management UI. Most startups won't outgrow this until they're making real revenue.

Resend (Free tier) sends 3,000 emails per month, up to 100 per day. Fast transactional email API — signup confirmations, password resets, notifications.

Loops (Free tier) covers 1,000 contacts for email marketing — drip campaigns (automated email sequences), newsletters, and SaaS-focused templates.

Analytics and monitoring

PostHog (Free tier) gives you 1 million events per month, session replays (recordings of what users actually do on your site), feature flags (toggles to turn features on/off for specific users), and A/B testing. Comprehensive product analytics for an early-stage startup.

Sentry (Free tier) tracks 5,000 errors and 10,000 performance events per month. When something breaks in production, Sentry tells you exactly what happened, where, and why.

Plausible is open source and self-hosted. Privacy-friendly web analytics with no cookies and full GDPR compliance. You need a server to run it, but paired with Oracle Cloud's free VMs, that server is also $0.

The complete $0 stack

Here's what a production-ready startup looks like at zero cost:

Layer Tool Free Tier
Frontend Next.js on Vercel 100 GB bandwidth
Backend Supabase 500 MB database, 50K MAU auth
Auth Supabase Auth or Clerk 10K–50K MAU
Database Supabase PostgreSQL 500 MB
Hosting Vercel + Cloudflare Unlimited static + 100K workers/day
AI Claude API + Gemini API $5 credit + free tier
CI/CD GitHub Actions 2,000 min/month
Email Resend 3,000 emails/month
Analytics PostHog 1M events/month
Monitoring Sentry 5K errors/month
Domain Cloudflare Registrar ~$10/year

Total monthly cost: $0. Plus roughly $0.83/month amortized for the domain — the one thing that costs money. 💰

This stack handles user authentication, a real PostgreSQL database with real-time subscriptions, file storage, serverless API routes, email notifications, error tracking, product analytics, AI-powered features, and automated deployment. These aren't toy services. Vercel handles millions of requests. Supabase runs production PostgreSQL. Cloudflare operates one of the largest CDNs (content delivery networks — global server networks that make your site fast everywhere) on the planet.

When you'll start paying

The free tier ceiling follows a predictable curve:

  • 0 to ~1,000 users — everything stays free
  • 1,000 to ~10,000 users — you'll bump into Supabase storage limits and PostHog event caps
  • 10,000+ users — time to pull out the credit card, but by now you should have revenue covering it

If you hit the point where free tiers aren't enough, that means you have a real product with real users. That's not a problem — that's the goal.

Now go build something

The best time to validate a startup idea was when shipping software cost $50K and you had no choice but to commit. The second best time is right now, when it costs $0 and the only barrier is you actually building the thing. 🚀

I've watched founders spend months "researching the best stack" instead of writing a single line of code. Here's the truth: every tool on this list is good enough. Copy the stack table above. Spend a weekend building. Ship it on Sunday night. You can always migrate later — but you can't migrate from "never launched."

The only tool you truly need is the one between your ears. Everything else is free. 🦝