Tool Hut

Founder stack playbook

Use the $0/mo free-tier dev stack

A real, deployed AI web product that can validate demand without a recurring platform bill while usage stays inside published free allowances.

Who it's for

A pre-revenue solo founder willing to monitor quotas and accept sleep, rate, support, and capacity limits.

Constraints

Strictly US$0 recurring infrastructure, no paid SLA, low traffic, no guarantee that free-tier terms remain unchanged, and a migration trigger documented in advance.

Approximate monthly cost

US$0 while every service remains inside its free allowance. Domain registration, tax, excess usage, backups, and your time are not free.

How the stack works

  1. Build a static React client and deploy it to Cloudflare Pages from GitHub.
  2. Use Supabase's free project for auth and relational data, with backups exported regularly.
  3. Proxy Groq calls through a free Worker so no provider key reaches the browser.
  4. Run tests through the included GitHub Actions allowance and monitor exceptions in Sentry's free tier.
  5. Track every quota; upgrade or migrate before a limit becomes a user-visible outage.

The stack

Frontend

React + Vite

A static client builds quickly and avoids paid server rendering when the backend is already separate.

Skip if: SEO, authenticated server rendering, or server actions are central to acquisition and product behaviour.

Alternatives: Astro, SvelteKit static, Next.js static export

Styling

Tailwind CSS

The open-source framework adds no runtime service or monthly design-system cost.

Skip if: the founder is faster with plain CSS, an existing component library, or a different established system.

Alternatives: Plain CSS, Sass, shadcn/ui

Static hosting

Cloudflare Pages

Global static delivery, preview deployments, TLS, and Git integration fit comfortably inside an early free-tier product.

Skip if: the framework depends on a server runtime better supported by Vercel, Netlify, or a container host.

Alternatives: Vercel Hobby, Netlify Free, GitHub Pages

Auth and database

Supabase

One free project supplies Postgres, authentication, storage, and row-level security without separate vendors.

Skip if: project pausing, free limits, or absent paid backups create unacceptable launch risk.

Alternatives: Firebase, Neon plus Clerk, PocketBase

Fast model API

Groq

Its developer allowance can validate latency-sensitive open-model features before paying for inference.

Skip if: the chosen model, guaranteed capacity, data controls, or production SLA is unavailable on the free tier.

Alternatives: Google AI Studio, OpenRouter free models, Local Ollama

Secure model proxy

Cloudflare Workers

The free request allowance is enough to hide keys, validate sessions, and rate-limit an early AI feature.

Skip if: model calls exceed execution limits or an existing backend can proxy requests without another runtime.

Alternatives: Supabase Edge Functions, Vercel Functions, Netlify Functions

Continuous integration

GitHub Actions

Tests and deployments run beside the repository with a useful included allowance for a small project.

Skip if: private-repository minutes, specialised runners, or supply-chain policy require another CI system.

Alternatives: GitLab CI, CircleCI, Bitbucket Pipelines

Error monitoring

Sentry

The free developer tier provides more launch protection than relying on console logs and user screenshots.

Skip if: telemetry policy forbids it or another free observability tool is already installed and reviewed.

Alternatives: Better Stack, Axiom, Self-hosted GlitchTip

Verification note: Free-tier availability checked 12 July 2026. This stack is a validation tactic, not a promise of permanently free production; record quota thresholds and the first paid upgrade before launch.

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