Kairo AI Starter — Next.js 16 SaaS Boilerplate with Auth, Stripe & Claude AI Chat

Launch your AI SaaS in days, not months. Kairo AI Starter is a production-ready Next.js 16 boilerplate where authentication, Stripe billing, usage-based credits and a streaming Claude chat are already wired together and tested.

Live demo: https://kairo-ai-demo.vercel.app (create a free account; the demo runs in demo mode, so AI replies and purchases are simulated)

What's included

• Authentication with Better Auth: email + password, Google and GitHub sign-in, password reset, protected routes, account deletion
• Stripe billing: monthly plans, one-time credit packs, customer portal and idempotent, signature-verified webhooks
• Usage-based credits: every AI reply is billed from real token usage into an auditable ledger
• Streaming AI chat with Anthropic's Claude via the official SDK: saved conversations, Markdown, stop and copy, prompt caching and automatic server-side fallback
• Landing page with hero, features, pricing, testimonials and FAQ, plus terms and privacy templates
• App: dashboard with usage stats, billing page with credit history, settings

Developer experience

• Runs with zero API keys: demo mode simulates AI and payments so every flow works right after npm install && npm run dev
• First run creates .env, a secret and the local SQLite database automatically (no Docker)
• Drizzle ORM with SQLite locally and Turso in production; one-click Vercel + Turso deploy
• Plans, prices, credit value and the AI system prompt live in three small config files
• 100% TypeScript, zero lint errors, detailed README

Tech stack

Next.js 16 · React 19 · Tailwind CSS 4 · shadcn/ui · TypeScript · Better Auth · Drizzle ORM · Turso/libSQL · Stripe · Anthropic SDK · Resend

What you get

• Full source code (ZIP)
• Documentation covering setup, Stripe, credits, customization and deployment
• Free lifetime updates

License

• Personal ($39): one end product for you or one client
• Commercial ($79): unlimited end products for you and your clients

You can't resell or redistribute the kit itself. See LICENSE.md in the download for the full terms. You'll need your own Anthropic, Stripe and hosting accounts to go live.