BLDR

The stack

The real tools. In the order you’ll need them.

Eight tools professional teams use, all free to start. You won’t study them one by one; each one moves your own product a step closer to live.

How the pieces connect

  1. 1

    Think

    Decide what to build

  2. 2

    Write code

    Agents type, you direct

  3. 3

    Save and ship

    Keep it safe, put it live

  4. 4

    Data and money

    Users, records, payments

You decide what to build with Claude, direct Cursor or Codex to write it, save every step to GitHub, and Vercel puts it live. Supabase holds your users and data; Stripe or Polar takes the money.

  • Claude

    Think

    An AI assistant from Anthropic that is strong at reasoning, writing, and reading long documents.

    In BLDR you’ll

    turn interview notes into a problem brief, pressure-test your idea, and draft the PRD your coding agent will follow.

    When
    Modules 1–2
    Cost
    Free plan available
  • Cursor

    Write code

    A code editor with AI agents built in. You describe the change; it proposes the edit for you to review.

    In BLDR you’ll

    build your app one small change at a time, read every diff, and keep the agent inside the scope of your PRD.

    When
    Modules 3–4
    Cost
    Free tier, paid plans for heavier use
  • Codex

    Write code

    OpenAI’s coding agent. It can work through a task in your repository and hand back a change to review.

    In BLDR you’ll

    hand off well-scoped tasks, like a settings page or a test, and compare its approach with Cursor’s.

    When
    Modules 3–4
    Cost
    Included with some ChatGPT plans
  • GitHub

    Save and ship

    Where your code lives. Every change is saved as a commit you can read, compare, and undo.

    In BLDR you’ll

    commit after every working step so nothing an agent does is ever unrecoverable.

    When
    Module 3
    Cost
    Free
  • Vercel

    Save and ship

    A hosting platform that turns your GitHub repository into a live website, with a preview for every change.

    In BLDR you’ll

    deploy to a public URL, connect your own domain, and set production environment variables.

    When
    Modules 4–5
    Cost
    Free hobby tier
  • Supabase

    Data and money

    A Postgres database with sign-in and file storage built in, managed from a friendly dashboard.

    In BLDR you’ll

    store your product’s data, add sign-in, and write the rule that user A can never see user B’s records.

    When
    Module 4
    Cost
    Free tier
  • Stripe

    Data and money

    The standard way to take card payments and run subscriptions online.

    In BLDR you’ll

    add checkout in test mode first, then switch on real payments once the flow is proven.

    When
    Module 4
    Cost
    Pay per transaction
  • Polar

    Data and money

    A payments platform for software products that acts as merchant of record, so it handles sales tax for you.

    In BLDR you’ll

    an alternative to Stripe when you want the simplest path to selling a subscription.

    When
    Module 4
    Cost
    Pay per transaction

Tool pricing changes; check each provider before subscribing. Tool costs are separate from the sprint price.

Learn the stack by shipping your own product.

Live by day 30 or your money back