Rule Engine vs Workflow Engine

This comparison explains architectural roles and responsibilities; it does not imply every organization must separate systems this way.

DimensionRule EngineWorkflow Engine
PurposeEvaluate business rules/conditionsOrchestrate tasks, states and approvals
OutputDecision, eligibility, value or rule resultNext task/state/owner/action
Change patternBusiness-rule changesProcess-flow changes
RelationshipWorkflow can call rulesRules can influence workflow routing
Important: Final design depends on products, policy, existing systems, data ownership and operating model.