With the increasing demand for complex

business capabilities, the monolithic

architecture can no longer cater to the

modern enterprise software application

development.

The centralized nature of monolithic

applications results in the lack of being

able to scale applications independently , inter-application dependencies that hinder

independent application development and

deployment, reliability issues due to the

centralized nature and the constraints on

using diverse technologies for application

development.

To overcome most of these limitations and

to cater to the modern, complex, and

decentralized application needs, a new

architecture paradigm must be conceived.

The microservices architecture has emerged

as a better architecture paradigm to

overcome the drawbacks of the ESB/SOA

architecture as well as the conventional

monolithic application architecture.

https://www.atlassian.com/microservices/microservices-architecture/microservices-vs-monolith