What is the difference between Monolith and Microservice?

Monolith (monolithic application) — is a single application where all components and functions are gathered in one codebase and deployed together. This approach is simpler in development at the initial stages, but as the project grows, it becomes more difficult to scale and maintain.

Microservice (microservices) — is an architectural style where the application is broken down into many small, independent services, each responsible for its own business function and deployed separately. This facilitates scaling, updating, and maintenance, but requires a more complex infrastructure and organization of interaction between services.

In brief:

• Monolith: a single application, easier to start, harder to scale.
• Microservices: a set of independent services, more complex to set up, easier to scale and maintain.