Most founders do not have a launch problem. They have a checklist problem. They keep adding features because they are not sure what "ready to launch" actually looks like.
Here is the checklist. Everything below is either a launch blocker or something that will bite you in the first 30 days. If you are building on a Next.js SaaS boilerplate, most of it is already handled before you write your first feature.
This sounds obvious, but auth is where most custom builds lose a week. You need registration, login, session handling, and a way to reset a forgotten password. Without it, you cannot collect email addresses, let alone charge anyone.
JWT auth in Next.js App Router is wired in from day one -- register, login, protected routes, and password reset included.
If you cannot take money on day one, you are not launching -- you are demoing. At minimum you need a checkout, a webhook that marks users as paid, and a way to gate features behind a paid plan.
Stripe subscriptions are pre-configured: checkout, webhook sync, and a customer portal so users can manage their own billing without emailing you.
Welcome email, password reset, payment receipt. If none of these fire, users think your product is broken. Resend plus react-email is already connected -- you add the template, the boilerplate handles the delivery.
Your landing page does not need to be beautiful. It needs to answer three questions in under 10 seconds: what is this, who is it for, and what does it cost. The boilerplate includes a header, footer, and full component library -- you compose sections, not raw CSS from scratch.
Hiding your price creates doubt. A clear pricing page -- even one plan -- lifts conversion because it signals you are serious. The boilerplate ships a pricing section with a monthly/annual toggle wired to real Stripe plans.
More than half of your first visitors will see your landing page on a phone. If it looks broken, they leave and never come back. Tailwind CSS with responsive utilities is the default -- every component adapts without extra work from you.
A user who signs up and never reaches the aha moment will churn before they ever see a bill. Even a 3-step onboarding checklist -- set up your profile, invite a team member, create your first item -- doubles activation. The boilerplate includes a per-user onboarding progress tracker out of the box.
You do not know what to build next until real users tell you. A simple in-app feature voting board is enough for the first 100 users. The boilerplate ships a feature voting module -- users upvote what matters, you ship what wins.
You need to know how many people visited, how many signed up, and where they dropped off. Vercel Analytics is already in the layout -- it fires automatically with no extra code.
Your first 10 users will find bugs you never imagined. Without error tracking you will find out via a support email two days later. Add Sentry to app/layout.tsx on day one -- 5 minutes now saves hours later.
The fastest way to learn why users churn is to ask them. A Resend broadcast list means you can email your users when you ship something new, not just when they trigger a transaction. The broadcast pattern is already in the stack.
When something breaks -- and it will -- you need a timeline. Vercel function logs plus the Drizzle audit log pattern give you enough to diagnose most incidents without guessing.
You do not need all 12 before you open the doors. You need 1, 2, and 3 plus whatever is specific to your product. The rest follows in the first two weeks.
The difference between a custom build and a boilerplate is not whether these things exist -- they will, in both cases, eventually. The difference is whether you spend month one building auth and payments, or building the feature that makes your SaaS worth paying for.
The fastest validation loop before launch: ship a pre-launch waitlist in a day and drive 100 people to it. If 20 percent sign up, you have a product worth finishing. If 2 percent sign up, you have a positioning problem -- worth knowing before you spend another month building.
The waitlist module is already in the boilerplate. You bring the copy, it handles the form, the database entry, the referral tracking, and the confirmation email.
Next.js SaaS Boilerplate ships every item on this checklist either built in or ready to wire up in a day. Clone the repo, pick your idea, and you can have a working, chargeable product before Monday -- every hour you save goes straight into the feature only you can build.