Supastarter

Supastarter is a SaaS starter kit built on top of Supabase and Next.js that gives developers a production-ready foundation for a new SaaS product, including authentication, multi-tenant organization support, subscription billing, internationalization, and a pre-built admin panel, aimed at developers who want to skip re-implementing the same foundational SaaS infrastructure for every new project they start. Because it's built specifically around Supabase, the starter kit takes advantage of Supabase's Postgres database, row-level security, and authentication service directly, rather than being a generic template that requires significant rework to integrate with a specific backend platform of the developer's choosing. Its multi-tenancy support handles the common but non-trivial pattern of organizations with multiple users and role-based permissions, which is a common requirement for B2B SaaS products but is genuinely fiddly to implement correctly and securely from scratch, especially around ensuring data isolation between different organizations sharing the same database. Subscription billing is pre-wired with webhook handling for common billing events, and the included admin panel gives a founder basic tools for managing users and subscriptions without building that internal tooling separately. Supastarter is delivered as source code developers own outright rather than a hosted service, letting teams modify any part of the codebase to fit their specific product needs. It's aimed at developers building B2B SaaS products who specifically want a Supabase-based foundation rather than a generic, backend-agnostic starter template.