{
  "id": "google-cloud-pub-sub-vs-amazon-sns",
  "ids": [
    "google-cloud-pub-sub",
    "amazon-sns"
  ],
  "title": "Google Cloud Pub/Sub vs Amazon SNS: topics, subscriptions and message delivery design",
  "heading": "Google Cloud Pub/Sub vs Amazon SNS",
  "kicker": "Cloud software comparison",
  "deck": "Compare Google Cloud Pub/Sub vs Amazon SNS for topics, subscriptions and message delivery design. Review the deployment model, migration work and proposed acceptance checks.",
  "description": "Google Cloud Pub/Sub vs Amazon SNS: compare topics, subscriptions and message delivery design before choosing a deployment.",
  "answerHeading": "Which option fits the workload?",
  "answer": "Consider Google Cloud Pub/Sub when the system needs Google Cloud topic and subscription messaging. Consider Amazon SNS when the system needs AWS topic-based notifications and supported SNS destinations. Validate the required configuration and operating responsibilities before comparing costs.",
  "checkedAt": "2026-10-25",
  "researchTag": "Architecture, migration and operating scope",
  "researchLimit": "Official product documentation and product pages reviewed. Proposed exercises are evaluation briefs, not completed performance benchmarks or private product trials.",
  "datasetDescription": "Seven differences and four proposed workload acceptance checks for Google Cloud Pub/Sub vs Amazon SNS.",
  "type": "workflow-buying",
  "sharedBuyingNeed": "Evaluate alternative services for topics, subscriptions and message delivery design.",
  "rows": [
    [
      "Provider",
      "Google Cloud",
      "AWS"
    ],
    [
      "Primary abstraction",
      "Topics and subscriptions",
      "Topics and subscriptions to supported destinations"
    ],
    [
      "Application role",
      "Asynchronous messaging between application components",
      "Publish-subscribe notifications and fan-out"
    ],
    [
      "Consumer design",
      "Select the Pub/Sub subscription and delivery mode",
      "Select the SNS destination and delivery arrangement"
    ],
    [
      "Queue integration",
      "Review Pub/Sub retention and subscriber behaviour",
      "Use SQS where the design needs a separate durable queue"
    ],
    [
      "Failure handling",
      "Configure acknowledgement and redelivery behaviour",
      "Configure endpoint delivery and failure handling"
    ],
    [
      "Cost exercise",
      "Message traffic, delivery and retained-data scope",
      "Publications, deliveries and connected destination services"
    ]
  ],
  "scenarios": [
    {
      "name": "Fan-out",
      "question": "Can the team publish one event for two independent test consumers?",
      "left": "Using Google Cloud Pub/Sub, publish one event for two independent test consumers.",
      "right": "Using Amazon SNS, publish one event for two independent test consumers.",
      "note": "Each intended consumer receives the event under the selected design."
    },
    {
      "name": "Unavailable consumer",
      "question": "Can the team pause one consumer and restore it under the documented configuration?",
      "left": "Using Google Cloud Pub/Sub, pause one consumer and restore it under the documented configuration.",
      "right": "Using Amazon SNS, pause one consumer and restore it under the documented configuration.",
      "note": "Recovery behaviour matches the application's retention requirement."
    },
    {
      "name": "Duplicate handling",
      "question": "Can the team replay a representative event to the consumer?",
      "left": "Using Google Cloud Pub/Sub, replay a representative event to the consumer.",
      "right": "Using Amazon SNS, replay a representative event to the consumer.",
      "note": "Consumer processing preserves the required business outcome."
    },
    {
      "name": "Failure route",
      "question": "Can the team exercise the configured message-failure path?",
      "left": "Using Google Cloud Pub/Sub, exercise the configured message-failure path.",
      "right": "Using Amazon SNS, exercise the configured message-failure path.",
      "note": "The team can identify and handle the failed message."
    }
  ],
  "exampleTable": {
    "caption": "Proposed acceptance checks using authorised non-production resources. Record the selected region, configuration and observed result.",
    "headers": [
      "Requirement",
      "Proposed exercise",
      "Accept when"
    ],
    "rows": [
      [
        "Fan-out",
        "Publish one event for two independent test consumers.",
        "Each intended consumer receives the event under the selected design."
      ],
      [
        "Unavailable consumer",
        "Pause one consumer and restore it under the documented configuration.",
        "Recovery behaviour matches the application's retention requirement."
      ],
      [
        "Duplicate handling",
        "Replay a representative event to the consumer.",
        "Consumer processing preserves the required business outcome."
      ],
      [
        "Failure route",
        "Exercise the configured message-failure path.",
        "The team can identify and handle the failed message."
      ]
    ]
  },
  "sections": [
    {
      "id": "architecture-and-fit",
      "title": "Architecture and application fit",
      "paragraphs": [
        "Pub/Sub and SNS both support topic-based messaging, but matching the word topic does not establish equivalent consumer behaviour. Decide whether the application needs notifications, competing workers, independent subscriptions or a queue behind a subscriber.",
        "SNS is frequently combined with SQS when the consumer needs a durable queue. Include that additional service in the architecture and cost comparison instead of treating SNS alone as the whole worker-delivery design."
      ],
      "links": [
        {
          "url": "https://docs.cloud.google.com/pubsub/docs?hl=en",
          "label": "Google Cloud Pub/Sub product documentation"
        },
        {
          "url": "https://aws.amazon.com/sns/",
          "label": "Amazon SNS product information"
        }
      ],
      "navLabel": "Architecture"
    },
    {
      "id": "cost-and-migration",
      "title": "Cost and migration planning",
      "paragraphs": [
        "Define how the application handles retries, duplicates and unavailable consumers. Product configuration and consumer idempotency need to work together; neither service removes the need for application-level failure handling.",
        "A useful trial pauses a consumer, introduces a duplicate message and then recovers the consumer. Check the actual delivery and retention settings for the selected configuration rather than assuming a universal exactly-once outcome."
      ],
      "navLabel": "Costs & migration"
    }
  ],
  "faqs": [
    {
      "question": "When should I choose Google Cloud Pub/Sub over Amazon SNS?",
      "answer": "Consider Google Cloud Pub/Sub when the system needs Google Cloud topic and subscription messaging. Consider Amazon SNS when the system needs AWS topic-based notifications and supported SNS destinations. Validate the required configuration and operating responsibilities before comparing costs."
    },
    {
      "question": "What should we include in the cost comparison?",
      "answer": "Define how the application handles retries, duplicates and unavailable consumers. Product configuration and consumer idempotency need to work together; neither service removes the need for application-level failure handling."
    },
    {
      "question": "What should we test before a production migration?",
      "answer": "A useful trial pauses a consumer, introduces a duplicate message and then recovers the consumer. Check the actual delivery and retention settings for the selected configuration rather than assuming a universal exactly-once outcome."
    }
  ],
  "sources": [
    {
      "url": "https://docs.cloud.google.com/pubsub/docs?hl=en",
      "facts": "Official product scope, deployment context and capabilities used in this comparison."
    },
    {
      "url": "https://aws.amazon.com/sns/",
      "facts": "Official product scope, deployment context and capabilities used in this comparison."
    }
  ],
  "relatedLinks": [
    {
      "path": "/categories/data-integration-engineering/",
      "title": "Data Integration Engineering software"
    }
  ]
}