What is the architecture of a Laravel SaaS?

A typical Laravel SaaS has six layers. Routing and middleware (tenant resolution, auth, rate limiting). Tenancy layer (Stancl with the right isolation pattern). Billing (Cashier with Stripe or Paddle). Feature flags (Pennant for gradual rollouts and per tier features). Queues (Horizon backed Redis workers for emails, exports, integrations). Real time (Reverb WebSockets for live updates, broadcasting for notifications). Above all of this sits the admin (Filament or custom), analytics, and observability (Pulse, Telescope, Sentry).