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Centrifugo vs Google Cloud Pub/Sub

Discover how Centrifugo compares to Google Cloud Pub/Sub, and understand which is right for your use case, based on dimensions such as core features, pricing, reliability, and scalability.

Centrifugo

What is Centrifugo?

Centrifugo is an open source, language-agnostic, self-hosted pub/sub server capable of scalable realtime messaging. It uses transports like WebSockets to deliver messages to active users.

Suitable for:

  • Collaboration tools
  • Chat applications
  • Multiplayer games

Not suitable for:

  • Small-scale projects
  • Non-realtime use cases

Pros:

  • High performance
  • Has message history and message recovery
  • Scalable architecture
  • Has user presence status
  • Customizable

Cons:

  • Requires server management
  • Steep learning curve
  • Complex setup

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

Compare Centrifugo and Google Cloud Pub/Sub

Let’s compare Centrifugo and Google Cloud Pub/Sub, 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 Centrifugo and Google Cloud Pub/Sub. The content was last updated on 23 Jul 2024 for Centrifugo and on 1 Aug 2024 for Google Cloud Pub/Sub. 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 If you do find anything incorrect or out of date, then please contact us.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.

Centrifugo

Yes

Google Cloud Pub/Sub

Yes

Chat capabilities

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

Centrifugo

Yes

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.

Collaboration capabilities

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

Centrifugo

No

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
State sync capabilities

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

Centrifugo

Yes

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.

Presence

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

Centrifugo
Google Cloud Pub/Sub

No

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.

Centrifugo

Yes

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
Message interactions

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

Centrifugo

No

Google Cloud Pub/Sub

No

Message history

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

Centrifugo

Yes

Centrifugo supports message history in channels, though it is not enabled by default.

Read more
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
Push notifications

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

Centrifugo

Yes

Centrifugo's paid option, Centrifugo PRO, offers a push notifications API.

Read more
Google Cloud Pub/Sub

Yes

You can create a push subscription workflow for push notifications using Google Pub/Sub.

Read more
Message delta compression

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

Centrifugo

Yes

Centrifugo supports delta compression only in channels with recovery and positioning on.

Read more
Google Cloud Pub/Sub

No

Programmatic management

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

Centrifugo

Yes

Google Cloud Pub/Sub

Yes

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.

Centrifugo

Yes

Centrifugo is open-source and free to use.

Google Cloud Pub/Sub

No

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.

Centrifugo

Centrifugo's base product is free and open-source, but there is also a paid version called Centrifugo PRO. More specific pricing information is not available online; for pricing, you need to contact Centrifugo's sales team.

Read more
Google Cloud Pub/Sub

Google Pub/Sub has usage-based pricing, based the number of published, delivered, and stored bytes.

Read more
Integrations & interoperability
SDKs

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

Centrifugo
  • Javascript
  • Go
  • Swift
  • Java
  • Python
Google Cloud Pub/Sub
  • C++
  • C#
  • Go
  • Java
  • Node.js
  • PHP
  • Python
  • Ruby
Supported realtime protocols

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

Centrifugo
  • WebSockets
  • Server-sent events (SSEs)
  • HTTP
  • GRPC
  • WebTransport
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.

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.

Centrifugo

None.

Google Cloud Pub/Sub
  • Google Cloud Functions
Streaming & queueing

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

Centrifugo

Yes

Google Cloud Pub/Sub

Yes

Observability services

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

Centrifugo

Partial

Centrifugo has no native observability tools, but offers integrations with monitoring tools such as Prometheus and Grafana.

Read more
Google Cloud Pub/Sub

Yes

The Google Monitoring, Alerting and Logging integration provides observability services.

Read more
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.

Centrifugo

No

Self-hosted, so you will have to implement your own.

Google Cloud Pub/Sub

Yes

Supports:

  • Jenkins
  • Google Cloud Build
Quality of Service
Scalability

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

Centrifugo

Centrifugo is designed for high scalability; its Redis engine allows for scaling Centrifugo nodes to different machines. For specific stats on scale, you can read more in Centrifugo's scale test tutorial.

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.

Guaranteed message delivery

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

Centrifugo

No

Google Cloud Pub/Sub

Yes

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.

Centrifugo

Partial

Centrifugo supports ordering in channels but not across channels.

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
Exactly-once message delivery

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

Centrifugo

No

Google Cloud Pub/Sub

Yes

Google Pub/Sub supports exactly-once delivery based on a Pub/Sub-defined unique message ID.

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.

Centrifugo

N/A

Google Cloud Pub/Sub

99.95%

Read more
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.

Centrifugo

No

Google Cloud Pub/Sub

Yes

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.

Centrifugo

No

Google Cloud Pub/Sub

Yes

Google Pub/Sub supports synchronous data replication across three zones.

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.

Centrifugo

No

Centrifugo relies on external systems like Redis or NATS for data storage, which may have their own failure points.

Google Cloud Pub/Sub

Yes

Latency

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

Centrifugo

N/A (self-hosted)

Google Cloud Pub/Sub

100ms round trip

Security & compliance
API key authentication

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

Centrifugo

Yes

Google Cloud Pub/Sub

No

Google Pub/Sub only supports gcloud CLI credential and Application Default Credentials (ADC).

Read more
Token-based authentication

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

Centrifugo

Yes

Supported with JSON Web Tokens (JWTs).

Read more
Google Cloud Pub/Sub

Yes

Single Sign-On (SSO) authentication

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

Centrifugo

Yes

SSO authentication is available only through Centrifugo PRO, its paid version.

Read more
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
Rules for permissions and operations

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

Centrifugo

Yes

Centrifugo supports permission rules for operations through its configuration.

Google Cloud Pub/Sub

Yes

Rules for permissions and operation can be configured using Identity and Access Management (IAM).

Read more
End-to-end encryption

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

Centrifugo

No

Google Cloud Pub/Sub

Yes

Encryption at rest

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

Centrifugo

No

Google Cloud Pub/Sub

Yes

Compliance

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

Centrifugo

None

Google Cloud Pub/Sub
  • HIPAA

Alternatives to Centrifugo and Google Cloud Pub/Sub

Whilst both Centrifugo and Google Cloud Pub/Sub 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 Centrifugo

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

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

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

See more alternatives to Centrifugo

Alternatives to Google Cloud Pub/Sub

AWS SQS is a message queuing solution for decoupling apps, services & architectures.

tech provider image

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.

See more alternatives to Google Cloud Pub/Sub

Discover how Centrifugo and Google Cloud Pub/Sub stack up against Ably

Ably is the definitive realtime experience platform of the internet. See how we compare to Centrifugo and Google Cloud Pub/Sub 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