Granularity is the key for reuse. Microservices, being small and focused on a specific business scenario, improve the opportunity for them to be reused across multiple subsystems within an organization. This in turn reflects as momentous cost savings.

The factor of reuse is proportional to the size of the organization and its IT applications. Bigger companies have more number of applications developed by multiple development teams, each of which may run their own delivery cycles. Often, the lack of ability to share code across these teams forces software components to be duplicated, causing a considerable impact on development and maintenance cost. Although service duplication across applications may not always be bad, with proper service cataloging and communication, Microservices can easily solve this problem by enabling service reuse across business units.