Nextacular

[Nextacular](https://nextacular.co) is an open-source starter kit aimed at full-stack multi-tenant SaaS platforms, so you can focus on your core features instead of plumbing. It handles teams and workspaces, authentication, billing and subscriptions via Stripe, custom domains, and transactional email. The stack is Next.js, Tailwind CSS, and Prisma on a SQL database. A lighter, community-maintained option if you want workspace-style multi-tenancy without adopting a larger monorepo framework.