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🧩 '''Microservice''' is a software architecture pattern in which an application is built as a collection of small, independently deployable services, each responsible for a discrete function. In the insurance industry, this approach has gained significant traction as [[Definition:Insurance carrier | carriers]], [[Definition:Managing general agent (MGA) | MGAs]], and [[Definition:Insurtech | insurtech]] firms seek to modernize technology stacks that were historically built on monolithic [[Definition:Legacy system | legacy systems]] — platforms where policy administration, [[Definition:Claims management | claims]], [[Definition:Billing | billing]], and [[Definition:Underwriting | underwriting]] functions are tightly coupled into a single codebase. By decomposing these capabilities into microservices, insurers can update, scale, or replace individual components without disrupting the entire system.

⚙️ In practice, an insurance platform built on microservices might have separate services for [[Definition:Quoting | quote generation]], [[Definition:Policy administration system (PAS) | policy issuance]], [[Definition:Premium | premium]] calculation, [[Definition:Claims | claims]] intake, [[Definition:Document management | document management]], and [[Definition:Regulatory reporting | regulatory reporting]], each communicating through well-defined [[Definition:Application programming interface (API) | APIs]]. This design allows teams to develop and deploy changes to one service — say, incorporating a new [[Definition:Rating algorithm | rating algorithm]] for [[Definition:Motor insurance | motor insurance]] — without rewriting or redeploying the rest of the platform. Cloud-native insurtech companies such as those offering [[Definition:Insurance-as-a-service | insurance-as-a-service]] platforms have adopted microservices from inception, while established carriers and [[Definition:Third-party administrator (TPA) | TPAs]] are increasingly refactoring their monolithic systems toward this pattern as part of broader [[Definition:Digital transformation | digital transformation]] programs. Container orchestration tools like Kubernetes and event-driven messaging systems are common enablers of microservice deployments across insurance IT environments.

💡 Adopting microservices is not merely a technical choice — it has strategic implications for how insurance organizations compete and innovate. The architecture enables faster [[Definition:Product development | product launches]], smoother integration with [[Definition:Ecosystem | ecosystem]] partners through APIs, and the ability to experiment with new capabilities like [[Definition:Artificial intelligence (AI) | AI]]-driven [[Definition:Fraud detection | fraud detection]] or [[Definition:Parametric insurance | parametric]] triggers without jeopardizing core operations. However, the shift also introduces operational complexity: managing dozens or hundreds of services demands robust monitoring, distributed-data governance, and organizational alignment around DevOps practices. For insurers evaluating technology vendors — whether [[Definition:Core system | core-system]] providers or niche point solutions — the vendor's architectural approach to microservices has become a key due diligence criterion, directly influencing questions about [[Definition:Vendor lock-in | vendor lock-in]], scalability, and long-term maintainability.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Application programming interface (API)]]
* [[Definition:Legacy system]]
* [[Definition:Policy administration system (PAS)]]
* [[Definition:Digital transformation]]
* [[Definition:Insurance-as-a-service]]
* [[Definition:Cloud computing]]
{{Div col end}}

Definition:Microservice - Revision history

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