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Monolith vs Microservices

DEFINITION

Two opposing architectural patterns. Monolith: one deployable application. Microservices: many small services communicating over a network.

In depth

Microservices buy you independent deployment and team autonomy — at the cost of operational complexity, network latency, and debugging pain. For early-stage SaaS, a modular monolith almost always wins: you get clean boundaries internally without paying the ops tax.

Rule of thumb: until you have 15+ engineers and a clear bottleneck, stay on a modular monolith. Extract microservices only where the pain is concrete.

Rules of thumb

  • Start with a modular monolith.
  • Extract a service only when deploy cadence or team autonomy demands it.
  • Microservices multiply observability requirements — budget accordingly.

Put it into practice

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Related terms

System Architecture
The high-level structure of a software system — its major components, their responsibilities, and how they communicate.
Technical Debt
The long-term cost of short-term engineering decisions — the interest you pay every time shortcuts compound.

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Last reviewed 14 April 2026 by Abhi Verma.