A production-ready SaaS boilerplate built 0-to-1. Features zero-trust per-user data isolation enforced at the database layer with PostgreSQL Row-Level Security, a full Stripe subscription lifecycle (Checkout, Customer Portal, webhooks), and real-time AI chat streamed from Claude via the Vercel AI SDK.

• WebsiteLive Demo
• Sourcehttps://github.com/utoker/launchkit
• Built withNext.js 16 / React 19 / TypeScript / Supabase / Stripe / Anthropic Claude (Vercel AI SDK)