"full-stack · 2026"

SaaS Starter Kit

A SaaS starter kit for building web applications.

Overview

The AI SaaS Starter Kit is an open-source boilerplate for building AI-powered SaaS products. It handles the infrastructure every AI SaaS needs auth, billing, multi-tenancy, agent orchestration, RAG pipeline, and streaming UI so you build features, not plumbing.

Case Study

Problem

Every AI SaaS project rebuilds the same foundation from scratch auth, billing, multi-tenancy, token metering, streaming UI. Weeks of work before a single line of product code gets written.

Solution

An open-source starter kit that ships all six layers pre-built. Next.js 16, tRPC, FastAPI, BetterAuth, Prisma, Lemon Squeezy, Qdrant Vector DB & RAG, Upstash Redis, and an OpenAI agent layer wired together and production-ready. The agent is a swappable slot. Bring your own tools, everything around them is already done.

Outcome

AI SaaS MVPs go from weeks of setup to a working base in under 15 minutes. Used as the foundation for every client project on Upwork cutting project kickoff time by more than half.

Tech Stack

Next.jsTypeScriptTailwind CSSGSAPReact.jsQdrant Vector DBRAGPythonFastAPIOpenAI Agents SDKLangChainGeminiClaude CodeBetter AuthRBAC & Multi-tenantSupabasePrisma ORMLemon SqueezytRPCbunMonorepoTurbo.json

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SaaS Starter Kit

Problem

Solution

Outcome

COME SAY HELLO

COME
SAY
HELLO