supastarter is a Next.js SaaS boilerplate that gives you a working SaaS codebase from day one. It’s aimed at developers and teams who want to ship quickly without rebuilding core building blocks like user auth, subscriptions, and multi-tenant organization features.
Key parts you get:
It also explicitly supports AI coding workflows. There’s an AGENTS.md (and related agent guidance) plus curated “agent skills” for common SaaS tasks like auth, payments, and database changes, which is meant to help tools like Cursor and Claude Code work with the codebase structure you already have.
The standout idea is that you start from a complete, production-shaped SaaS architecture rather than assembling those systems yourself, so you can spend your time on your product logic and customer-facing features.
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