Google Cloud Pub/Sub vs Microsoft Azure Web PubSub
Discover how Google Cloud Pub/Sub 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 Google Cloud Pub/Sub?
Google Cloud Pub/Sub is a real-time messaging service. Pub/Sub is used for asynchronous messaging between different systems, and services, within your applications. It enables developers to build robust and scalable real-time applications.
Suitable for:
- Chat applications
- Realtime analytics
- IoT data ingestion
- Log aggregations
- Online collaboration applications
Not suitable for:
- Stateful applications
Pros:
- Highly scalable
- Easy to use
- Integrates with Google Cloud's ecosystem
- Reliable
Cons:
- Cost can escalate quickly
- Vendor lock-in
- Debugging can be challenging
- Limited retention time
- Lack of configuration control
- Isolated service
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 Google Cloud Pub/Sub and Microsoft Azure Web PubSub
Let’s compare Google Cloud Pub/Sub 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 Google Cloud Pub/Sub and Microsoft Azure Web PubSub. The content was last updated on 1 Aug 2024 for Google Cloud Pub/Sub and on 1 Aug 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. | Google Cloud Pub/Sub Yes | Microsoft Azure Web PubSub |
Chat capabilities | Accelerates the time to implement rich chat experiences with features such as read receipts, typing indicators, and more. | Google Cloud Pub/Sub No Chat features such as group chat, emojis, and file sharing are not supported by Google Pub/Sub out of the box, which is intended to be used for service-to-service communication. | 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. | Google Cloud Pub/Sub No Google Pub/Sub recommends using other Google services like Firebase Realtime database to build applications that require functionalities like collaboration. Read more | 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. | Google Cloud Pub/Sub No Google Pub/Sub does not support a state sync feature out of the box, but this can be achieved in combination with a realtime database. | 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. | Google Cloud Pub/Sub No | 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. | Google Cloud Pub/Sub Yes Google Pub/Sub provides monitoring dashboards that can be used to monitor subscriptions. Subscriptions can also be monitored through the Cloud Monitoring API. Read more | Microsoft Azure Web PubSub No |
Message interactions | Enables interaction with previously-sent messages, facilitating the implementation of features like message reactions and threads. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub No Pub/Sub can't retrieve acknowledged messages. You can use the Seek feature to mark them as unacknowledged and redeliver them or delete unacknowledged messages. Read more | 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. | Google Cloud Pub/Sub Yes You can create a push subscription workflow for push notifications using Google Pub/Sub. Read more | 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. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub No | 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. | Google Cloud Pub/Sub Google Pub/Sub has usage-based pricing, based the number of published, delivered, and stored bytes. Read more | Microsoft Azure Web PubSub
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Integrations & interoperability | |||
SDKs | Supporting multiple languages and platforms offers greater flexibility when building cross-platform realtime apps. | Google Cloud Pub/Sub
| Microsoft Azure Web PubSub
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Supported realtime protocols | Support for multiple protocols provides the flexibility to choose a protocol that best suits your project’s requirements. | Google Cloud Pub/Sub None. Google Pub/Sub does not natively support any real-time protocols. However, you can implement WebSockets using other Google services like Google's Compute Engine. | Microsoft Azure Web PubSub
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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. | Google Cloud Pub/Sub
| Microsoft Azure Web PubSub
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Streaming & queueing | Provides a dependable method to reroute messages from the service to third-party streams and queues for further processing. | Google Cloud Pub/Sub Yes | Microsoft Azure Web PubSub No Azure Web PubSub is not used for steaming and queuing. Other Azure services are available for these:
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Observability services | Enables realtime monitoring and troubleshooting by offering insights into service behavior directly in your observability platform of choice. | Google Cloud Pub/Sub Yes The Google Monitoring, Alerting and Logging integration provides observability services. Read more | 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. | Google Cloud Pub/Sub Yes Supports:
| 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. | Google Cloud Pub/Sub Google Pub/Sub is built to be scalable and reliable. Google uses the service for their products to send billions of messages per day. You can read more about their architecture and limitations in their documentation. | 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. | Google Cloud Pub/Sub Yes | 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. | Google Cloud Pub/Sub No Google Pub/Sub supports message ordering, but cannot always guarantee it even when this is enabled - for example, when dead-letter topics are enabled on subscriptions. Read more | Microsoft Azure Web PubSub |
Exactly-once message delivery | Guarantees that each message is processed exactly once, preventing data inconsistencies that can arise from duplicate processing or missing messages. | Google Cloud Pub/Sub Yes Google Pub/Sub supports exactly-once delivery based on a Pub/Sub-defined unique message ID. Read more | Microsoft Azure Web PubSub |
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. | Google Cloud Pub/Sub 99.95% Read more | Microsoft Azure Web PubSub
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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. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub Yes Google Pub/Sub supports synchronous data replication across three zones. | 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. | Google Cloud Pub/Sub Yes | 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. | Google Cloud Pub/Sub 100ms round trip | Microsoft Azure Web PubSub Unknown. |
Security & compliance | |||
API key authentication | Simplifies the authentication code on trusted servers compared to requesting, managing, and refreshing tokens. | Google Cloud Pub/Sub No Google Pub/Sub only supports gcloud CLI credential and Application Default Credentials (ADC). Read more | Microsoft Azure Web PubSub Yes |
Token-based authentication | Provides a means to securely authenticate user devices against your user management system. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub Yes SSO authentication in Pub/Sub is supported through Google Cloud IAM, OAuth 2.0, and Workforce Identity Federation, allowing integration with external identity providers like Azure AD or Okta. Read more | 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. | Google Cloud Pub/Sub Yes Rules for permissions and operation can be configured using Identity and Access Management (IAM). Read more | 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. | Google Cloud Pub/Sub 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. | Google Cloud Pub/Sub Yes | Microsoft Azure Web PubSub No |
Compliance | Compliance with regulations can impact your ability to meet legal obligations in your industry. | Google Cloud Pub/Sub
| Microsoft Azure Web PubSub
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Alternatives to Google Cloud Pub/Sub and Microsoft Azure Web PubSub
Whilst both Google Cloud Pub/Sub 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 Google Cloud Pub/Sub
AWS SQS is a message queuing solution for decoupling apps, services & architectures.
Apache Kafka is an open-source real-time data streaming platform.
Azure Service Bus is a fully managed message service with message queues and Pub/Sub topics.
Alternatives to Microsoft Azure Web PubSub
Google Cloud Pub/Sub is a scalable messaging service that can be used to send and receive messages from applications or services.
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.
Discover how Google Cloud Pub/Sub and Microsoft Azure Web PubSub stack up against Ably
Ably is the definitive realtime experience platform of the internet. See how we compare to Google Cloud Pub/Sub and Microsoft Azure Web PubSub on key dimensions such as core features, pricing, integrations, QoS, performance, and security and compliance.
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- 200 concurrent connections