I've been building B2B SaaS OS, a reusable foundation for developers who don't want to assemble the same infrastructure from scratch every time they start a new project. It includes: Authentication and OAuth Multi-tenancy and role-based access control Team invitations Stripe billing and webhooks API keys and usage limits Audit logs and Row Level Security While hardening the product, I found four real bugs, fixed them, and added regression tests. The stack is Next.js 16, React 19, TypeScript, Supabase and Stripe. I'm trying to make the foundation more useful to developers who want to focus on their actual product rather than repeatedly rebuilding the infrastructure around it. I'd appreciate feedback on the product and what you'd want to see before trusting a starter kit with a real SaaS project. I'm the creator of the product. Demo: https://www.andrady.co/demo Website: https://www.andrady.co   submitted by   /u/Pale_Ferret_8241 [link]   [comments]