Microservices vs Monolith for Early SaaS

Microservices solve organizational scale problems more often than technical ones. Most early SaaS products should start as a well-structured monolith.

Modular monolith first

Separate domains inside one deployable unit. Clear module boundaries make future service splits possible without premature complexity.

Split services when boundaries are obvious

Heavy async workers, isolated compliance domains, or teams that cannot coordinate releases may justify separate services.