Software Architecture
•
10 min read
•
Oct 09, 2026
How to Architect Multi-Tenant SaaS Databases for High Availability
D
Devraj Singh, Cloud Systems Engineer
Published on Codevexa Engineering
When building SaaS applications that scale from 10 customers to 10,000, choosing between database-per-tenant, schema-per-tenant, and row-level security is a foundational decision.
### Shared Database with Tenant ID
Cost-effective, easier maintenance, and simple database backups. Ideal for early-stage to growth-stage SaaS.
### Database Per Tenant
Absolute data isolation, tailored security compliances (HIPAA, SOC2), but requires sophisticated migration automation across multiple databases.
### Shared Database with Tenant ID
Cost-effective, easier maintenance, and simple database backups. Ideal for early-stage to growth-stage SaaS.
### Database Per Tenant
Absolute data isolation, tailored security compliances (HIPAA, SOC2), but requires sophisticated migration automation across multiple databases.