BUS INTEGRATION
One-Pager · 8 Services

Azure Integration & Messaging at a Glance

Every Azure integration and messaging service on one page — workflow orchestration, API gateways, message brokers, and event routing. A quick reference for architects connecting systems.

Logic Apps
Low-code workflow orchestration with 1,000+ connectors. Visual designer for B2B, SaaS, and enterprise integration patterns. Consumption or Standard hosting.
B2B workflowsSaaS integrationLow-code1000+ connectors
Azure Functions
Event-driven serverless compute. Lightweight glue code triggered by HTTP, queues, timers, blobs, or Event Grid. Pay per execution, scale to zero.
Event processingGlue logicServerlessScale to zero
API Management
Full-lifecycle API gateway. Rate limiting, OAuth, caching, developer portal, versioning. Fronts any backend — Functions, App Service, AKS, on-prem.
API gatewayDeveloper portalRate limitingOAuth
Service Bus
Enterprise message broker with queues and topics. FIFO, sessions, dead-letter, transactions, duplicate detection. Premium tier for VNET isolation.
DecouplingOrdered messagingEnterpriseTransactions
Event Grid
Reactive event routing at cloud scale. Push-based delivery to Functions, webhooks, queues. Native integration with 20+ Azure services as event sources.
Event routingReactive patternsPush deliveryServerless
Event Hubs
Big-data streaming platform. Millions of events/sec ingestion with partitioned consumer model. Kafka-compatible endpoint. Capture to ADLS/Blob.
Telemetry ingestionStream processingKafka APICapture
Storage Queues
Simple HTTP-based queue built into Azure Storage. No infrastructure to manage. Best for high-volume, low-complexity decoupling scenarios.
Simple decouplingHigh volumeHTTP APICheap
Stream Analytics
Real-time analytics engine with SQL-like query language. Processes streams from Event Hubs, IoT Hub, or Blob. Outputs to dashboards, databases, or alerts.
Real-time analyticsIoT processingSQL queriesWindowing

Quick Comparison

ServicePatternBest ForThroughputMin Cost
Logic AppsOrchestrationMulti-step workflows, B2BThousands/hrConsumption: per action
FunctionsEvent-drivenLightweight glue, transformationsMillions/day1M free exec/mo
API ManagementGatewayAPI facade, rate limiting, portalVaries by tier~$50/mo (Developer)
Service BusMessage brokerEnterprise messaging, ordered delivery2K–4K msg/s (Premium)~$10/mo (Basic)
Event GridEvent routingReactive integrations, fan-out10M events/s$0.60/M operations
Event HubsStreamingTelemetry ingestion, Kafka replacementMillions/s~$11/mo (Basic)
Storage QueuesSimple queueHigh-volume, simple decoupling20K msg/s per account~$0.01/10K operations
Stream AnalyticsStream processingReal-time SQL over streamsMillions/s~$80/mo (1 SU)

When to Use What

ScenarioUse ThisWhy
Connect SaaS apps (Salesforce → SAP)Logic AppsPre-built connectors, visual designer, enterprise integration
Process queue messages with custom codeFunctions + Service BusCode flexibility + reliable message delivery
Expose internal APIs to partnersAPI ManagementRate limiting, security, developer portal, versioning
React to Azure resource changesEvent GridNative Azure integration, push delivery, serverless
Ingest IoT telemetry at scaleEvent HubsMillions/sec throughput, partitioned consumers, Capture
Simple task queue for background jobsStorage QueuesCheapest option, no infrastructure to manage
Real-time dashboards from event streamsStream AnalyticsSQL-based windowed aggregations over live data