juniorSOA
What is the difference between SOA and Microservices?
Updated Apr 28, 2026
Short answer
SOA is an enterprise-wide approach often using an ESB; Microservices is an application-scoped style focusing on small, autonomous units.
Deep explanation
SOA focuses on integrating disparate systems using standardized interfaces. By abstracting business logic into services, organizations can leverage legacy systems while building new capabilities. It relies heavily on XML-based standards and centralized governance through an ESB.
Real-world example
A banking system where 'GetBalance' and 'TransferFunds' are discrete services accessible by web, mobile, and branch apps.
Common mistakes
- Confusing a simple library or DLL with a network-accessible SOA service.
Follow-up questions
- What is UDDI?