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Google Cloud Pub/Sub vs Apache Pulsar

Side-by-side comparison of Google Cloud Pub/Sub and Apache Pulsar. Data-driven analysis for CTOs and engineering leaders.

Technical Profile

Google Cloud Pub/Sub

Scalability
very high
Performance
very high
Learning Curve
easy
Maturity
mature
Languages: Any (gRPC/HTTP API)

Apache Pulsar

Scalability
very high
Performance
very high
Learning Curve
steep
Maturity
stable
Languages: Java, Python, Go, C++

When to Use

Google Cloud Pub/Sub

  • +GCP infrastructure
  • +Global messaging
  • +Stream processing

Avoid Google Cloud Pub/Sub when

  • -Strict ordering required
  • -Multi-cloud
  • -Long message retention

Apache Pulsar

  • +Need multi-tenancy
  • +Geo-replication required
  • +Unified messaging/streaming

Avoid Apache Pulsar when

  • -Simple queuing
  • -Small teams
  • -Limited ops resources

Compliance & Security

Google Cloud Pub/Sub

SOC 2GDPRHIPAAPCI-DSS

Security Features

EncryptionAudit LogsRBACMFA

Apache Pulsar

SOC 2GDPRHIPAAPCI-DSS

Security Features

EncryptionAudit LogsRBACMFA

Operations

Google Cloud Pub/Sub

Maintenance
low
Monitoring
low
Backup/Recovery
simple
Hosting: managed

Apache Pulsar

Maintenance
high
Monitoring
high
Backup/Recovery
complex
Hosting: self-hosted, cloud, managed

Frequently Asked Questions

How does scalability compare between Google Cloud Pub/Sub and Apache Pulsar?

Google Cloud Pub/Sub offers very-high scalability, while Apache Pulsar offers very-high scalability. Consider your expected traffic and data volume when choosing.

Which has the easier learning curve: Google Cloud Pub/Sub or Apache Pulsar?

Google Cloud Pub/Sub has a easy learning curve, while Apache Pulsar has a steep learning curve. Factor in your team's existing skills and onboarding timeline.

What are the pricing differences between Google Cloud Pub/Sub and Apache Pulsar?

Google Cloud Pub/Sub uses a usage-based pricing model starting at $40 per TB with a free tier. Apache Pulsar uses a free pricing model with a free tier. Evaluate total cost of ownership including operational overhead.

Which option is better for compliance: Google Cloud Pub/Sub or Apache Pulsar?

Google Cloud Pub/Sub supports SOC 2, GDPR, HIPAA, PCI-DSS. Apache Pulsar supports GDPR. Always verify current certifications directly with the vendor.

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