Best Google Cloud Pub/Sub Alternatives in 2026
The top Google Cloud Pub/Sub alternatives are RabbitMQ, Solace PubSub+ Event Broker and Apache Kafka: 15 message broker software our editors would look at instead of Google Cloud Pub/Sub, in our ranking order.
Google Cloud Pub/Sub: A managed cloud pub/sub service with strong delivery controls and usage-based pricing. Where it falls short: paid standard throughput starts at $40 per TiB monthly.
Switching from Google Cloud Pub/Sub? For most message broker software buyers the best Google Cloud Pub/Sub alternative is RabbitMQ, built for general-purpose open-source messaging. On a budget, Upstash QStash starts at $180/mo. HiveMQ MQTT Broker offers the most maximum message size (256 MB).
Why People Look for a Google Cloud Pub/Sub Alternative
- Paid standard throughput starts at $40 per TiB monthly
- Storage, transfer, import, export, and transformation charges can also apply
- Cloud deployment may not suit teams seeking a self-managed broker
- Maximum message size: 10 MB — up to 256 MB with HiveMQ MQTT Broker
Quick Picks by What You Need
- Best overallRabbitMQ9.4
General-purpose open-source messaging
Visit RabbitMQ - Lowest priceUpstash QStash7.7
Paid plans from $180/mo
Visit Upstash QStash - Best free optionRabbitMQ9.4
Has a free plan
Visit RabbitMQ - Most maximum message sizeHiveMQ MQTT Broker8.0
256 MB
Visit HiveMQ MQTT Broker
All 15 Google Cloud Pub/Sub Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forGeneral-purpose open-source messaging
- Better than Google Cloud Pub/Sub:
- Maximum message size: 16 MB vs 10 MB
- Editor score 9.4 vs 9.1
A broad, open-source broker for queues, routing, streaming, and hybrid deployments.
- Dead-letter queues
9.4/10★★★★★Visit RabbitMQ -
Best forHybrid event mesh deployments
- Better than Google Cloud Pub/Sub:
- Editor score 9.2 vs 9.1
A broad hybrid event broker for teams connecting applications, services and devices.
9.2/10★★★★★Visit Solace -
Best forEvent streaming and stream processing
A broad open-source foundation for event streaming, integration, and stream processing.
9.0/10★★★★☆Visit Apache Kafka -
Best forEnterprise transactional messaging
- Better than Google Cloud Pub/Sub:
- Maximum message size: 100 MB vs 10 MB
A broad enterprise messaging platform with strong reliability features and substantial pricing.
- Dead-letter queues
8.8/10★★★★☆Visit IBM MQ -
Best forSelf-hosted enterprise messaging
A capable self-hosted broker for durable, transactional, multi-protocol messaging.
- Dead-letter queues
8.7/10★★★★☆Visit Apache Artemis -
Best forOpen-source streaming and transactions
A broad, open-source broker for teams building self-hosted event-driven systems.
8.6/10★★★★☆Try Apache RocketMQ -
Best forManaged AWS queues
A managed AWS queue service with standard and FIFO delivery options.
- Dead-letter queues
8.5/10★★★★☆Visit Amazon SQS -
Best forLightweight pub/sub and streaming
A focused open-source broker for pub/sub, queues, and persistent streaming.
8.4/10★★★★☆Visit NATS -
Best forFree self-hosted broker deployments
A free self-hosted broker with broad protocol support and configurable delivery controls.
- Dead-letter queues
8.3/10★★★★☆Try Apache ActiveMQ -
Best forProtocol-bridging messaging platforms
A protocol-bridging broker for teams running queues, streams, events, and RPC across hybrid systems.
- Dead-letter queues
8.2/10★★★★☆Visit KubeMQ -
Best forMQTT with cloud integrations
A broad MQTT platform for real-time messaging, integrations, routing, and durable storage.
8.1/10★★★★☆Visit EMQX -
Best forManaged MQTT at scale
- Better than Google Cloud Pub/Sub:
- Maximum message size: 256 MB vs 10 MB
A flexible MQTT broker for teams managing connected devices and high-volume messaging.
- Dead-letter queues
8.0/10★★★★☆Visit HiveMQ -
Best forManaged ActiveMQ or RabbitMQ on AWS
A cloud-managed choice for AWS teams running ActiveMQ or RabbitMQ workloads.
- Dead-letter queues
7.9/10★★★★☆Visit Amazon MQ -
Best forAMQP-focused self-hosting
A self-hosted broker with broad AMQP support, persistence, and high availability.
- Dead-letter queues
7.8/10★★★★☆Visit Apache Qpid -
Best forServerless HTTP task delivery
A flexible HTTP message broker for scheduled, retried, and fan-out serverless tasks.
- Dead-letter queues
7.7/10★★★★☆Visit Upstash QStash
Google Cloud Pub/Sub Alternatives: Common Questions
What is the best alternative to Google Cloud Pub/Sub?
RabbitMQ: #1 in our Message Broker Software ranking, with an editor score of 9.4 out of 10. A broad, open-source broker for queues, routing, streaming, and hybrid deployments.
Is there a free alternative to Google Cloud Pub/Sub?
Yes. RabbitMQ, Solace PubSub+ Event Broker, Apache Kafka, IBM MQ and Apache Artemis have a free plan or a free tier (13 of the 15 alternatives on this page).
What is the cheapest paid alternative to Google Cloud Pub/Sub?
Of the alternatives here that publish a price, Upstash QStash starts lowest, at $180/mo.
Why do people look for Google Cloud Pub/Sub alternatives?
Paid standard throughput starts at $40 per TiB monthly; Storage, transfer, import, export, and transformation charges can also apply; Cloud deployment may not suit teams seeking a self-managed broker.
Which Google Cloud Pub/Sub alternative has the most maximum message size?
HiveMQ MQTT Broker, with 256 MB.
How do I switch from Google Cloud Pub/Sub?
Export your data from Google Cloud Pub/Sub (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Google Cloud Pub/Sub.
How to Switch from Google Cloud Pub/Sub
- Export your data from Google Cloud Pub/Sub (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Google Cloud Pub/Sub.
Google Cloud Pub/Sub vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment model | Delivery guarantees | Dead-letter queues | Ordering guarantees | Score |
|---|---|---|---|---|---|---|---|---|
| 3 | Google Cloud Pub/Sub | Yes | Cloud | Configurable | Yes | 9.1 | ||
| 1 | RabbitMQ | Yes | Free | Hybrid | Configurable | Yes | Per_queue | 9.4 |
| 2 | Solace PubSub+ Event Broker | Yes | Hybrid | 9.2 | ||||
| 3 | Apache Kafka | Free | 9.0 | |||||
| 4 | IBM MQ | Yes | $312/unit/mo | Hybrid | Configurable | Yes | Per_queue | 8.8 |
| 5 | Apache Artemis | Yes | Free | Self_hosted | Configurable | Yes | Per_queue | 8.7 |
| 6 | Apache RocketMQ | Free | 8.6 | |||||
| 7 | Amazon SQS | Yes | Cloud | Configurable | Yes | Per_queue | 8.5 | |
| 8 | NATS | Free | Hybrid | Configurable | 8.4 | |||
| 9 | Apache ActiveMQ | Yes | Free | Self_hosted | Configurable | Yes | Per_queue | 8.3 |
| 10 | KubeMQ | Hybrid | Configurable | Yes | Per_queue | 8.2 | ||
| 11 | EMQX | Yes | $234/mo | Hybrid | Configurable | 8.1 | ||
| 12 | HiveMQ MQTT Broker | Yes | $299/mo | Hybrid | Configurable | Yes | 8.0 | |
| 13 | Amazon MQ | No | Cloud | Configurable | Yes | Per_queue | 7.9 | |
| 14 | Apache Qpid Broker-J | Free | Self_hosted | Yes | Per_queue | 7.8 | ||
| 15 | Upstash QStash | Yes | $180/mo | Cloud | At_least_once | Yes | Per_queue | 7.7 |
Head-to-Head
- Google Cloud Pub/Sub vs RabbitMQ
- Google Cloud Pub/Sub vs Solace PubSub+ Event Broker
- Google Cloud Pub/Sub vs Apache Kafka
- Google Cloud Pub/Sub vs IBM MQ
- Google Cloud Pub/Sub vs Apache Artemis
- Google Cloud Pub/Sub vs Apache RocketMQ
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Last updated · How we research and update