Multi-tenancy in B2B SaaS applications offers significant scalability and efficiency benefits but comes with inherent risks that require proactive design considerations for tenant isolation, predictable performance, and compliance with industry standards. The article details five common risks associated with multi-tenancy, such as data leakage, complex authorization logic, noisy neighbors, compliance challenges, and difficulties in debugging. It emphasizes the importance of using modern tools like Clerk, Supabase, and Neon to mitigate these risks by ensuring secure data access, efficient resource allocation, and compliance with regulations through features like Row Level Security and per-organization roles. These tools help maintain tenant-specific isolation and observability, simplifying the management of multi-tenant environments. By addressing these risks effectively, SaaS providers can ensure their applications remain secure, scalable, and compliant, paving the way for sustained success with enterprise clients.