Can a Laravel SaaS scale to thousands of tenants?

Yes. We have shipped Laravel SaaS platforms serving 40K plus active users across thousands of tenants on a single architecture. The standard scaling toolkit is single database multi-tenancy with proper indexing, Redis caching for tenant configuration, Horizon for heavy work, read replicas, and horizontal scaling on Forge or Vapor. For enterprise tier customers needing stronger isolation, we move them to database per tenant within the same codebase, no rewrite needed.