How I used Vercel Wildcard Domains & Vertex AI to build a multi-tenant SaaS for $2.99/mo

Hey everyone,

I’m gearing up to launch Mealhouse (an AI-powered meal planner for families), and I wanted to share a quick breakdown of how I handled the multi-tenant architecture and AI parsing.

The Goal: I wanted every family to feel like they had their own bespoke app, rather than just logging into a generic dashboard.

The Stack & Insights:

• Wildcard Subdomains: I used Next.js deployed on Vercel. Their native support for wildcard subdomains made it incredibly smooth to instantly provision URLs like burchfamily.mealhouse.app for users right at signup.

• The AI Recipe Parser: Instead of forcing users to use a generic recipe database, I built a "Bring Your Own Recipe" vault. I hooked up GCP Vertex AI to parse chaotic food blogs, text snippets, and images into a clean JSON format for ingredients and steps.

• Monetization: Wired up Stripe for a $2.99/mo "impulse buy" subscription model.

Would love to connect with anyone else building multi-tenant apps on Vercel, or anyone wrestling with prompt engineering for unstructured web data! Happy to answer any questions about the build.