Azure Web PubSub Pricing and Features: Real-Time Messaging
Azure Web PubSub is a fully managed real-time messaging service that enables you to build scalable, bidirectional communication features using WebSocket connections and the publish-subscribe pattern. It handles the complexity of managing persistent connections at scale, allowing developers to focus on application logic rather than infrastructure. EPC Group has implemented Azure Web PubSub for enterprise dashboards, live collaboration tools, and real-time notification systems that serve thousands of concurrent users.
Overview of Azure Web PubSub
Azure Web PubSub provides a managed WebSocket service that supports native WebSocket connections along with a rich server-side SDK for message routing, group management, and event handling. Unlike Azure SignalR Service, which is designed primarily for ASP.NET applications, Web PubSub is protocol-agnostic and works with any WebSocket client in any programming language.
The service supports two communication models: a simple WebSocket subprotocol for basic messaging and a JSON-based subprotocol for structured messages with built-in group management, user authentication, and permission control. Server-side event handlers process upstream messages through webhooks or Azure Functions, enabling serverless real-time architectures.
- Native WebSocket support: Standard WebSocket protocol with no proprietary client libraries required
- Publish-subscribe pattern: Groups, users, and connections for targeted message delivery
- Event-driven architecture: Server-side event handlers via HTTP webhooks or Azure Functions
- Client-side messaging: Allow clients to send messages directly to groups without server round-trips
- 100K+ concurrent connections: Single unit supports up to 1,000 concurrent connections, horizontally scalable to 100+ units
Key Features
- Managed WebSocket connections: No need to manage WebSocket servers, connection pooling, or heartbeat monitoring
- JSON and binary protocols: Support for both JSON subprotocol and raw binary WebSocket frames
- Group management: Add and remove connections from groups dynamically for targeted messaging
- User identity binding: Associate WebSocket connections with authenticated user identities
- Permission system: Fine-grained permissions to control which clients can send to groups or connections
- REST API: Send messages, manage connections, and query status through a comprehensive REST API
- Azure Functions integration: Trigger and output bindings for serverless event processing
- Custom event handlers: Route client events to specific server endpoints based on event type
- TLS encryption: All connections secured with TLS 1.2
- Private endpoints: Network isolation through Azure Private Link
Pricing Tiers
Azure Web PubSub offers a free tier for development and two paid tiers for production workloads.
Free Tier
- 20 concurrent connections
- 20,000 messages per day
- 1 unit maximum
- Suitable for development and prototyping
Standard Tier
- Approximately $1.61 per unit per day (about $49/month per unit)
- 1,000 concurrent connections per unit
- 2 million messages per unit per day included
- Scale up to 100 units for 100,000 concurrent connections
- Additional messages billed at $1 per million messages
Premium Tier
- Higher per-unit cost with enhanced SLA and features
- Private endpoints and custom domains
- Higher message throughput limits
- Availability zone support for mission-critical workloads
- Recommended for enterprise production deployments
Enterprise Use Cases
- Live dashboards: Push real-time metrics, KPIs, and alerts to Power BI embedded dashboards and custom web UIs
- Collaborative editing: Build Google Docs-style collaboration features with real-time cursor tracking and conflict resolution
- Chat and messaging: Enterprise chat applications with group conversations, presence indicators, and message history
- Live notifications: Push notifications to web and mobile clients for order status, system alerts, and workflow triggers
- IoT telemetry visualization: Stream sensor data to browser-based dashboards for real-time monitoring
- Gaming and interactive media: Multiplayer game state synchronization and live audience participation
- Financial data streaming: Real-time stock quotes, trade execution notifications, and market data feeds
Integration with Other Azure Services
- Azure Functions: Trigger and output bindings for serverless event processing of WebSocket messages
- Azure Event Grid: React to Web PubSub connection and disconnection events with Event Grid triggers
- Azure API Management: Proxy WebSocket connections through API Management for throttling and monitoring
- Azure Active Directory: Authenticate WebSocket clients with Azure AD tokens for enterprise identity integration
- Azure Monitor: Metrics and diagnostic logs for connection counts, message throughput, and error rates
- Azure Private Link: Connect to Web PubSub over private endpoints within your virtual network
Best Practices for Enterprise Deployments
- Use the JSON subprotocol: The structured subprotocol provides built-in group management and permission control
- Implement connection authentication: Always validate client tokens before establishing WebSocket connections
- Design for reconnection: Clients should implement automatic reconnection with exponential backoff
- Use groups for message targeting: Prefer group-based messaging over individual connection broadcasting for efficiency
- Monitor connection limits: Set up alerts when approaching the concurrent connection limit per unit
- Enable diagnostic logging: Route logs to Azure Monitor for troubleshooting connection issues and message delivery failures
- Plan for scaling: Auto-scale units based on connection count metrics to handle traffic spikes
- Use private endpoints in production: Network isolation prevents unauthorized access to your Web PubSub service
Why Choose EPC Group for Azure Web PubSub
With 29 years of enterprise Microsoft consulting, EPC Group brings production-grade expertise to real-time application architectures. Our team has built live dashboards for Fortune 500 operations centers, real-time notification systems for healthcare facilities, and collaborative tools for financial services firms—all leveraging Azure Web PubSub and the broader Azure ecosystem.
We design real-time architectures that account for scalability, security, and reliability. Our consultants handle WebSocket protocol design, server-side event handler implementation, client SDK integration, and production monitoring setup.
Ready to Build Real-Time Features?
Contact our Azure application architects for a free consultation on your real-time messaging requirements. We will assess your use case, recommend the optimal architecture, and deliver a production-ready implementation.
Frequently Asked Questions
What is the difference between Azure Web PubSub and Azure SignalR Service?
Azure SignalR Service is designed specifically for ASP.NET Core applications using the SignalR library. Azure Web PubSub uses standard WebSocket protocols and works with any programming language or client framework. Choose Web PubSub for cross-platform WebSocket applications; choose SignalR Service for ASP.NET-centric projects where the SignalR programming model is preferred.
How many concurrent connections can Azure Web PubSub handle?
Each standard unit supports up to 1,000 concurrent WebSocket connections. You can scale to 100 units per service instance for 100,000 concurrent connections. For even higher scale, deploy multiple service instances behind a traffic manager. EPC Group has architected solutions supporting tens of thousands of simultaneous connections for enterprise dashboards.
Can I use Azure Web PubSub without a server?
Yes. Azure Web PubSub integrates with Azure Functions through trigger and output bindings, enabling fully serverless real-time architectures. Client events trigger Functions, which process the message and can send responses back through the Web PubSub output binding—no always-on server required.
Is Azure Web PubSub suitable for financial data streaming?
Yes. With TLS 1.2 encryption, private endpoints, Azure AD authentication, and low-latency message delivery, Web PubSub meets the requirements for financial data applications. It is used for real-time quote streaming, trade notifications, and portfolio dashboards in production financial services environments.
What happens when a client disconnects unexpectedly?
Azure Web PubSub detects disconnections through WebSocket heartbeat monitoring and fires a disconnected event to your server-side event handler. Clients should implement automatic reconnection with exponential backoff. The service maintains group memberships briefly after disconnection, allowing seamless rejoin when the client reconnects within the configured timeout window.
Why Organizations Choose EPC Group
EPC Group is a Houston-based Microsoft consulting firm with 29 years of enterprise implementation experience and over 10,000 successful deployments across Power BI, Microsoft Fabric, SharePoint, Azure, Microsoft 365, and Copilot. We serve organizations across all industries including Fortune 500, federal agencies, healthcare, financial services, government, manufacturing, energy, education, retail, technology, and global enterprises.
What sets EPC Group apart is our governance-first approach. Every engagement begins with a security and compliance assessment. Our team of senior architects brings hands-on delivery experience across HIPAA, SOC 2, FedRAMP, and CMMC environments. We own outcomes, not hours.
- Fixed-fee accelerators with predictable pricing and defined deliverables
- Senior architect engagement on every project, not rotating juniors
- Compliance-native delivery for regulated industries
- End-to-end coverage from strategy through 24/7 managed services
- 11,000+ enterprise engagements refined into repeatable, risk-controlled patterns
Call (888) 381-9725 or email contact@epcgroup.net for a free assessment.