SaaS
SaaS Multi-Tenancy Architecture: Selecting the Right Database Strategy
Evaluating shared database / shared schema vs. separate database architectures for scaling modern B2B SaaS platforms.
Cloud Practice (Staff Software Engineer)
June 30, 2026
7 min read
The Core Multi-Tenancy Trade-Off
When designing a B2B SaaS application, data isolation is paramount. Developers must choose between tenant isolation approaches: single database with tenant_id foreign keys, separate schemas per tenant, or completely isolated database instances.
For modern web startups, PostgreSQL Row Level Security (RLS) offers the sweet spot: single database simplicity combined with kernel-level tenant isolation guarantees.
#SaaS#PostgreSQL#Database Architecture#Cloud
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