Ship a SaaS in a Weekend: The Exact Next.js + Supabase + Stripe Stack

Every indie hacker has the same graveyard: half finished SaaS projects that died somewhere between “auth is done” and “now I need billing.” The product was never the hard part. The plumbing was.

The weekend ship is real, but only if you stop rebuilding the same plumbing every time. Here is the exact stack that gets you from idea to charging customers in 48 hours, and the traps that eat most of the weekend.

The stack: boring on purpose

Next.js (App Router) for the whole app. Server components for data fetching, server actions for mutations, one deployment. No separate API server to babysit.

Supabase for auth and Postgres. Email login, OAuth with Google and GitHub, and a real database with Row Level Security so users can only touch their own rows. The free tier covers you until you have real traction.

Stripe for billing. Checkout Sessions for the payment page, webhooks to flip the subscription flag in your database, the customer portal so you never build a billing settings page.

Tailwind CSS for styling, Vercel for hosting. This combination is the default for a reason: git push and you are live with preview URLs for every branch.

Nothing here is exotic. That is the point. Every hour you spend evaluating alternatives is an hour not shipping.

The 48 hour plan

Friday night (2 hours): project setup. Scaffold the Next.js app, connect Supabase, get email login working end to end. Create the Stripe account and flip it to test mode. By midnight you can sign up, log in, and log out. That is further than most side projects ever get.

Saturday morning (4 hours): the database. Design the smallest schema that works: a profiles table linked to the auth user, a subscriptions table with the Stripe customer ID and status, and whatever two or three tables your actual product needs. Turn on Row Level Security from the start. Writing RLS policies on day one takes twenty minutes. Retrofitting them after launch takes a weekend and a small panic.

Saturday afternoon (4 hours): billing. This is where weekends go to die, so follow the checklist. Create your products and prices in the Stripe dashboard. Build a pricing page with a checkout button that creates a Stripe Checkout Session. Then the part everyone skips: the webhook handler. Stripe sends events like checkout.session.completed and customer.subscription.deleted to your app, and your handler updates the subscription status in Supabase. Verify the webhook signature on every request. Test the full loop in test mode: pay with card 4242 4242 4242 4242, confirm the database flips to active, cancel, confirm it flips back. If any step of that loop is broken, you do not have billing. You have a button.

Sunday morning (4 hours): the actual product. This is the fun part and it comes last on purpose. Build the two or three screens your users pay for. Everything else, settings pages, admin panels, onboarding tours, gets cut. If a feature does not justify the subscription, it does not ship this weekend.

Sunday afternoon (3 hours): landing page and launch. One page: the problem, the product, the price, the signup button. Deploy to Vercel, flip Stripe to live mode, run one real $1 test charge on your own card, refund it. Post the launch somewhere your users hang out.

Total: about 17 focused hours. Tight but doable.

The three traps

Trap 1: building your own auth. Every hour spent on custom JWT handling is an hour stolen from the product. Supabase Auth or Clerk, pick one in five minutes and move on.

Trap 2: skipping webhook verification. Unsigned webhook handlers are a free subscription dispenser for anyone with curl. Verify the signature. This is a thirty minute job that protects all your revenue.

Trap 3: the settings page spiral. Billing portal from Stripe handles plan changes and cancellations. You do not need to build any of it. Link to the portal and spend the time on the core product instead.

The shortcut

This stack works, but wiring it up still costs you that first Saturday. Auth flows, RLS policies, the Stripe webhook handler with signature verification, the pricing page, the customer portal link: it is the same code in every project.

That is why we built Slimstack: the whole stack above, already wired. Next.js 14 with the App Router, Supabase auth with Google and GitHub OAuth, Postgres with RLS policies written for you, Stripe Checkout plus a verified webhook handler, a pricing page, and the customer portal linked. Clone it, add your product screens, deploy. The plumbing weekend becomes a plumbing hour.

It is $149, and there is a launch code LAUNCH30 that takes 30% off: Slimstack on Gumroad.

Whether you start from scratch or from a starter kit, the principle is the same: boring stack, tiny schema, verified webhooks, ship Sunday. The graveyard is full of interesting stacks. The revenue is in the boring ones.