Google Cloud Pub/Sub

GCP hyperscaler bus for agent events. Prefer Service Bus on Azure for sessions; EventBridge on AWS; QStash…

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GCP hyperscaler bus for agent events. Prefer Service Bus on Azure for sessions; EventBridge on AWS; QStash when you want no cloud account gravity. Strengths: Simple global pub/sub fan-out; Generous free 10 GiB; Push to Cloud Run/Functions.

Overall

8.1

curated_estimate

confidence: high · as of 2026-09-14

Capability fit

8.2

Price / performance

8.2

Latency / reliability

9.2

Developer & agent DX

7.6

Privacy / data retention

8.2

Lock-in risk (higher = worse)

5.5

Maturity / track record

9.5

Lock-in risk: higher = more lock-in (worse). Overall already inverts this dimension.

Sources: Pub/Sub pricing: https://cloud.google.com/pubsub/pricing · Pub/Sub: https://cloud.google.com/pubsub

GCP hyperscaler bus for agent events. Prefer Service Bus on Azure for sessions; EventBridge on AWS; QStash when you want no cloud account gravity.

Strengths

· Simple global pub/sub fan-out
· Generous free 10 GiB
· Push to Cloud Run/Functions

Weaknesses

· Weaker FIFO/session semantics than Service Bus
· GCP-centric
· TiB math surprises vs per-request queues

Pricing notes

As of 2026-09-14 (cloud.google.com/pubsub/pricing): Message ingestion/delivery throughput ~$40/TiB after first 10 GiB/mo free. Some export/import paths ~$50/TiB without that free tier. Ordering keys, push/pull, exactly-once (regional) for agent fan-out. Confirm current SKU table for Lite vs standard.

Regions: global, us, euLast reviewed: 2026-09-14Status: active

Sourced pricing

Contract status unavailable · no_sourced_price. Single normalized $/1M: null. Machine list: /api/pricing?provider=gcp-pubsub

No sourced SKU row. Notes above stay prose.

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