Google Cloud Pub/Sub vs Apache RocketMQ

Google Cloud Pub/Sub9.1Visit Apache RocketMQ8.6Visit

Higher score Google Cloud Pub/Sub #3 in Message Broker Software 9.1/10 Free plan Free plan✓ 1 of 1 features Visit Google Cloud

vs

Apache RocketMQ #7 in Message Broker Software 8.6/10 Open source ✓ 0 of 1 features Try Apache RocketMQ

• Google Cloud Pub/Sub fits best

  Managed cloud pub/sub

• Apache RocketMQ fits best

  Open-source streaming and transactions

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Side by side

Feature	Google Cloud Pub/Sub 9.1/10 Visit ↗	Apache RocketMQ 8.6/10 Visit ↗
At a glance
Editor score	9.1	8.6
Ranking	#3 in Message Broker Software	#7 in Message Broker Software
Best for	Managed cloud pub/sub	Open-source streaming and transactions
Pricing model	Free plan + paid	Free
Starting price	—	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Cloud	Self-hosted, Cloud
Platforms	Web	Linux, Windows, macOS
Support	Tickets, Community, Docs · 24/7	Docs, Community
Integrations	9 integrations	50+ integrations
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features Google Cloud Pub/Sub 1/1 · Apache RocketMQ 0/1
Dead-letter queues	✓ (best)	Not checked yet
Specs
Deployment model	Cloud	Not checked yet
Delivery guarantees	Configurable	Not checked yet
Ordering guarantees	Not checked yet	Not checked yet
Maximum message size	10 MB	Not checked yet
Supported protocols	REST, gRPC	Not checked yet
Our review
Pros	Exactly-once delivery, ordering keys, replay, and dead-letter topics Pull and push subscriptions with message filtering Integrations with BigQuery, Cloud Storage, Dataflow, and more	Transactional messages with two-phase commit, FIFO, and delayed delivery Replay, filtering, stream processing, and source and sink connectors Broad protocol support with SDKs for Java, Go, C++, Rust, Python, and Node.js
Cons	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	Self-hosted deployment places infrastructure operations with your team Its broad feature set may require specialist messaging expertise This listing covers the open-source project, not a managed cloud service
Our verdict	Google Cloud Pub/Sub is a fully managed real-time messaging service for exchanging messages between independent applications. It fits teams building event-driven applications, streaming pipelines, and distributed systems that need publish… Read the review →	Apache RocketMQ is an open-source distributed messaging and event-streaming platform from the Apache Software Foundation. It is designed for microservices, data integration, IoT, and AI communication workloads, with self-hosted deployment… Read the review →

Strengths and trade-offs

• Google Cloud Pub/Sub — where it wins

  • Exactly-once delivery, ordering keys, replay, and dead-letter topics
  • Pull and push subscriptions with message filtering
  • Integrations with BigQuery, Cloud Storage, Dataflow, and more

  Where it doesn't

  • 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

• Apache RocketMQ — where it wins

  • Transactional messages with two-phase commit, FIFO, and delayed delivery
  • Replay, filtering, stream processing, and source and sink connectors
  • Broad protocol support with SDKs for Java, Go, C++, Rust, Python, and Node.js

  Where it doesn't

  • Self-hosted deployment places infrastructure operations with your team
  • Its broad feature set may require specialist messaging expertise
  • This listing covers the open-source project, not a managed cloud service

• Google Cloud Pub/Sub9.1/10 · Free plan

  A managed cloud pub/sub service with strong delivery controls and usage-based pricing.

  Visit Google CloudFull verdict →
• Apache RocketMQ8.6/10 · Open source

  A broad, open-source broker for teams building self-hosted event-driven systems.

  Try Apache RocketMQFull verdict →