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Azure SignalR Service vs Microsoft Azure Web PubSub

Discover how Azure SignalR Service compares to Microsoft Azure Web PubSub, and understand which is right for your use case, based on dimensions such as core features, pricing, reliability, and scalability.

What is Azure SignalR Service?

Azure-hosted, fully managed realtime framework built on top of an open-source software library for Microsoft ASP.NET. It allows server code to send asynchronous notifications to client-side web applications. The library includes server-side and client-side JavaScript components.

Suitable for:

  • Live chat
  • Data broadcast (stock tickers, live dashboards)
  • Multiplayer collaboration

Not suitable for:

  • Mission-critical scenarios that require data integrity guarantees

Pros:

  • Fully managed service
  • Global reach
  • Seamlessly integrates with other Azure services
  • Built-in support for authentication and authorization
  • Monitoring & diagnostics capabilities

Cons:

  • Not reliable at scale or spikes
  • Must choose one data center to locate apps
  • Message latencies increase for clients further away from datacenter
  • No message delivery guarantees

What is Microsoft Azure Web PubSub?

Microsoft Azure Web PubSub is a fully managed service for real-time messaging using WebSockets and the publish-subscribe pattern. It handles up to 100,000 concurrent connections, managing scaling, encryption, and authentication. It's ideal for live broadcasts, IoT dashboards, and integrates with Azure functions. It provides APIs for managing clients and messaging.

Suitable for:

  • Messaging
  • Chat
  • Dashboards
  • Multiplayer games

Not suitable for:

  • Apps that need message queues
  • Apps that need presence
  • Apps that need message history
  • Integration with non Azure Serverless platforms

Pros:

  • Part of the Azure ecosystem
  • Many resources, since it's provided by Microsoft
  • Key focus on security, with many compliance certifications
  • Large customer base

Cons:

  • No self-hosting option
  • Fewer supported languages with libraries
  • Fewer integrations
  • Uptime SLAs are not the best available (99.9% for free/standard and 99.95% for Premium vs Ably's 99.999%)

Compare Azure SignalR Service and Microsoft Azure Web PubSub

Let’s compare Azure SignalR Service and Microsoft Azure Web PubSub, looking at key dimensions such as their core features, pricing, integrations, QoS, performance, and security and compliance.

Disclaimer:This comparison was created based on documentation and resources freely available online about Azure SignalR Service and Microsoft Azure Web PubSub. The content was last updated on 11 Jul 2024 for Azure SignalR Service and on 11 Jul 2024 for Microsoft Azure Web PubSub. Be sure to double-check everything before you make any decisions. If you do find anything incorrect or out of date, then please contact us.

Core features
Pub/Sub messaging

Reduces communication code complexity, simplifying the process of building highly functional and architecturally complex realtime apps.

Azure SignalR Service

Partial

Azure SignalR does not provide pub/sub capabilities by itself but you can use it in combination with backplanes such as Redis or Event Grid, which support the pub/sub model.

Microsoft Azure Web PubSub

Yes

Pub/sub messaging is the core functionality of Microsoft Azure Web PubSub.

Read more
Chat capabilities

Accelerates the time to implement rich chat experiences with features such as read receipts, typing indicators, and more.

Azure SignalR Service

No

Documentation references chat, but it is not clear how you would deliver it. There's no native chat capability.

Microsoft Azure Web PubSub

No

Microsoft Azure Web PubSub and its SDKs do not have this functionality out of the box. It is possible to build a chat application, but you would need to build the functionality yourself.

Read more
Collaboration capabilities

Enables you to quickly integrate realtime collaborative features like live cursors, member location, avatar stacks, and component locking.

Azure SignalR Service

No

An article on-site showcases a solution idea for collaboration, but not using SignalR.

Microsoft Azure Web PubSub

No

Microsoft Azure Web PubSub and its SDKs do not have this functionality out of the box. It is possible to build out collaboration functionality, but you would need to do it yourself.

Read more
State sync capabilities

Enables realtime data synchronization across devices and users, ensuring a cohesive and up-to-date user experience.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Presence

Maintaining a view of which users are connected, and their associated metadata, enables their online status to be updated in realtime.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Partial

Microsoft Azure Web PubSub doesn't offer presence out of the box, but can support presence when integrated with Microsoft Hubs and Groups.

Read more
Occupancy

High-level metrics about the clients currently connected to a channel make it simple to show things such as connected user count, or display which channels are the most popular.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Message interactions

Enables interaction with previously-sent messages, facilitating the implementation of features like message reactions and threads.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Message history

Enables clients to catch up on missed messages when inactive, ensuring a user doesn’t miss any important messages.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Push notifications

Cross-platform push notifications make it possible to deliver important and timely messages to users even when they’re inactive.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Microsoft Azure Web PubSub has no native push notification functionality. Microsoft has a separate service for this - Azure Notification Hubs.

Read more
Message delta compression

Minimizes bandwidth and can reduce latency, particularly in scenarios where continuous updates are sent.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Programmatic management

Enables the automation of provisioning, management, and testing of service resources, simplifying integration with existing development workflows such as CI.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

There are multiple ways to configure Azure programatically; two of the most popular are Terraform and Azure Bicep.

Read more
Pricing
Free plan

With a free plan, you can test the service’s functionality and compatibility with your project before committing to a paid plan.

Azure SignalR Service

Yes

Offers 20 concurrent connections and 20,000 messages per day

Read more
Microsoft Azure Web PubSub

Yes

Pricing model

The pricing model should align with your project's expected load, usage patterns, and budget in order to be cost-effective and efficient.

Azure SignalR Service
  • Free, standard and premium tiers
  • Availability zone support, fully managed auto scaling and customised domain name only available in premium tier
  • No SLA for free tier - 99.9% for standard tier, 99.95% for premium tier
Read more
Microsoft Azure Web PubSub
  • Free
  • Standard
  • Premium
Read more
Integrations & interoperability
SDKs

Supporting multiple languages and platforms offers greater flexibility when building cross-platform realtime apps.

Azure SignalR Service
  • .NET
  • Java
  • JavaScript
  • Python
  • Flutter
  • REST API (any language that supports HTTP requests)
Microsoft Azure Web PubSub
  • JavaScript
  • C#
  • Python
  • Java
Supported realtime protocols

Support for multiple protocols provides the flexibility to choose a protocol that best suits your project’s requirements.

Azure SignalR Service
  • WebSockets
  • HTTP
  • SSE
Microsoft Azure Web PubSub
  • HTTP
  • WebSockets
  • Webhooks
Serverless functions

Enables integration with third-party cloud providers by facilitating the execution of custom code against messages to perform business logic like on-the-fly translation.

Azure SignalR Service
  • Microsoft Azure Functions
Microsoft Azure Web PubSub
  • Azure Functions
Streaming & queueing

Provides a dependable method to reroute messages from the service to third-party streams and queues for further processing.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Azure Web PubSub is not used for steaming and queuing. Other Azure services are available for these:

  • Queueing: Azure Service Bus & Azure Queues
  • Streaming: Azure Event Hubs
Observability services

Enables realtime monitoring and troubleshooting by offering insights into service behavior directly in your observability platform of choice.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

CI/CD tools

Makes it possible to provision and configure service infrastructure as part of a CI or CD pipeline, enabling repeatable and reliable deployments.

Azure SignalR Service

While Azure SignalR itself doesn't have specific integration points in CI/CD tools, the broader Azure ecosystem and the Azure CLI or PowerShell can be leveraged in your CI/CD scripts to manage Azure SignalR resources.

Microsoft Azure Web PubSub

No

Quality of Service
Scalability

Scalability is vital as it ensures the service can handle increased data load or users without compromising performance.

Azure SignalR Service

No metrics available

Microsoft Azure Web PubSub

Azure offers different unit sizes to meet customer requirements. Metrics on performance are provided by the Azure platform for rightsizing resource requirements.

Read more
Guaranteed message delivery

Ensures messages are never lost during transmission, even in the presence of network disruptions.

Azure SignalR Service

No

Microsoft Azure Web PubSub

No

Guaranteed message ordering

Maintains the sequence of messages as they were sent. This is particularly important in apps where the chronological order of messages is essential for meaningful communication.

Azure SignalR Service

No

Microsoft Azure Web PubSub

Partial

Only available with Reliable JSON Websocket or Protobuf subprotocols.

Read more
Exactly-once message delivery

Guarantees that each message is processed exactly once, preventing data inconsistencies that can arise from duplicate processing or missing messages.

Azure SignalR Service

No

Microsoft Azure Web PubSub

Partial

Only available with Reliable JSON Websocket or Protobuf subprotocols.

Read more
Performance & availability
Uptime Guarantee

An uptime guarantee instills confidence in the reliability of the service and protects your business from the negative impacts of downtime.

Azure SignalR Service
  • On the free tier there is no SLA
  • Standard tier: 99.9% uptime SLA
  • Premium tier: 99.95% uptime SLA
Microsoft Azure Web PubSub
  • Free/standard: 99.9%
  • Premium: 99.95%
Global edge network

By bringing servers (Points of Presence, or PoP) geographically closer to the devices of end users, and routing requests to the nearest PoP, global latency is reduced to a minimum.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

No

Multi-region data replication (message durability)

By replicating data across multiple regions, the risk of data loss or downtime is greatly mitigated since if data is lost or a server fails in one region, the information can be retrieved from another.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

It is possible to set up multi-region primary/secondary resources with geo-replication.

No single point of failure or congestion

Having no single point of failure means a system is resilient and can continue to operate even if one part fails. Avoiding a single point of congestion ensures messages flow efficiently across the system and avoids bottlenecks that could lead to performance issues under load.

Azure SignalR Service

No

Microsoft Azure Web PubSub

Partial

Depends on architecture. It is possible to deploy to multiple regions with failover, and each region uses Availability Zones.

Read more
Latency

Low latency is crucial for realtime apps as it ensures swift and efficient data transmissions, providing a smoother and more responsive user experience.

Azure SignalR Service

Unknown

Microsoft Azure Web PubSub

Unknown.

Security & compliance
API key authentication

Simplifies the authentication code on trusted servers compared to requesting, managing, and refreshing tokens.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

Token-based authentication

Provides a means to securely authenticate user devices against your user management system.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

Microsoft Azure Web PubSub supports JWT and ephemeral tokens.

Single Sign-On (SSO) authentication

SSO streamlines login processes, boosts security by minimizing password use, and meets compliance needs for secure data access management.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

Microsoft Azure Web PubSub supports Microsoft Entra ID.

Rules for permissions and operations

Provides control over which users can subscribe and publish to certain channels.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

Supported through Azure RBAC.

End-to-end encryption

Ensures that the data transmitted between the client and the API server remains confidential and secure while in transit.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

Yes

Data in transit encryption is enabled by default.

Encryption at rest

Ensures data stored by the service is secure and compliant, while also mitigating the risks of a data breach.

Azure SignalR Service

Yes

Microsoft Azure Web PubSub

No

Compliance

Compliance with regulations can impact your ability to meet legal obligations in your industry.

Azure SignalR Service
  • SOC 2 Type I
  • SOC 2 Type II
  • HIPAA
  • EU GDPR
Microsoft Azure Web PubSub
  • SOC1
  • SOC2
  • SOC3
  • GDPR
  • There are many more certifications listed here.

Alternatives to Azure SignalR Service and Microsoft Azure Web PubSub

Whilst both Azure SignalR Service and Microsoft Azure Web PubSub are worth considering as options for realtime experiences, they aren’t without their limitations. We suggest evaluating them against the following alternatives to make sure you find the right solution for your needs.

Alternatives to Azure SignalR Service

PubNub is a developer API platform that powers the realtime infrastructure in apps to build engaging Virtual Spaces where online communities can connect.

Socket.IO is a library that provides realtime, bi-directional communication between clients and servers. It allows the management of connections, sending and receiving messages, and more.

Pusher is a first-generation pub/sub messaging service that provides bi-directional hosted APIs for adding realtime features to applications.

Alternatives to Microsoft Azure Web PubSub

Azure SignalR is an Azure-hosted, fully managed realtime framework built on top of an open-source software library for Microsoft ASP.NET.

Amazon SNS is an AWS service for designed to distribute notifications from applications to subscribers via SMS, email, etc.

Google Cloud Pub/Sub is a scalable messaging service that can be used to send and receive messages from applications or services.

Discover how Azure SignalR Service and Microsoft Azure Web PubSub stack up against Ably

Ably is the definitive realtime experience platform of the internet. See how we compare to Azure SignalR Service and Microsoft Azure Web PubSub on key dimensions such as core features, pricing, integrations, QoS, performance, and security and compliance.

Try Ably for free to discover the benefits for yourself

Ably has built reliable realtime infrastructure so you don’t have to. On our free plan you benefit from:

  • 6M Monthly messages
  • 200 concurrent channels
  • 200 concurrent connections