A SaaS product is three systems wearing a trench coat: accounts, a database of the user's work, and recurring billing. Get those three right and everything else is a feature. Here's how to ship all three without writing the plumbing yourself.
Define the core loop
What does a user do, repeatedly, that they'd pay for? That loop — create, save, return, improve — is your product. Everything in your first version should serve it and nothing else.
Resist adding settings, teams, and integrations before a single user has completed the loop twice.
Accounts, data, and billing
Auth: email, social, or magic link, with each user's data scoped by Row Level Security. Database: one or two core tables that store the user's work. Billing: a subscription tier with a checkout page and a customer portal.
In SiteFast you add each by asking: "Add login," "Save projects per user," "Add a $29/month plan with Stripe checkout."
Ship, then iterate
Publish to a live URL with SSL, connect a custom domain, and put it in front of five real users. Their friction points are your roadmap.
Iterate by chatting — adjust copy, add a missing field, tighten the onboarding — and republish in seconds.
FAQ
What's the minimum a SaaS MVP needs?
Accounts, a place to do the core work, and a way to pay. Everything else can wait.
How do I handle subscriptions?
Stripe handles checkout, recurring billing, and a customer portal; connect it and wire your plan tiers to feature access.
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