Microservices split an app into small, independently deployable services. They help large teams scale parts of a system separately — but for most projects a well-built monolith is faster, cheaper and easier to run. Complexity should be earned, not assumed.
Monolith vs microservices
A monolith is one deployable application. Microservices break it into many small services that talk over the network, each owning its own data and deploy cycle.
The real trade-offs
| Monolith | Microservices | |
|---|---|---|
| Speed to build | Fast | Slower |
| Operational cost | Low | High (infra, monitoring) |
| Independent scaling | Limited | Strong |
| Best team size | Small–medium | Multiple teams |
When microservices help
- Several teams need to ship independently without stepping on each other.
- One part of the system has very different scaling needs.
- You need to isolate failures so one component can't take everything down.
Reality check: microservices trade code complexity for operational complexity — networks, monitoring, deployments. Only worth it when the benefits above clearly apply.
A sensible path
Most products should start as a clean, modular monolith and split off a service only when a real pressure appears. This keeps you fast early and lets architecture follow need — see also what an MVP is.