Stream data from Azure Cosmos DB to Google PubSub
Sync your Azure Cosmos DB data with Google PubSub in minutes using Estuary Flow for real-time, no-code integration and seamless data pipelines.
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Azure Cosmos DB connector details
The Azure Cosmos DB connector captures documents from your Cosmos DB collections into Flow collections. It supports both real-time streaming via change streams and batch modes for collections that don’t support change streams.
- Supports multiple capture modes: Change Stream Incremental (real-time), Batch Snapshot, and Batch Incremental
- Automatically detects time series collections and uses optimal cursor fields for efficient polling
- Captures inserts, updates, and deletes when using change streams
- Batch modes enable flexible scheduled scans for collections without change stream support
- Works securely within Estuary’s Private and BYOC environments for compliance and governance
💡 Tip: For best performance, ensure your cursor field (such as _id or timeField) is indexed to optimize incremental captures.

Google PubSub connector details
The Google Cloud Pub/Sub materialization connector continuously publishes updates from Estuary collections to Pub/Sub topics in your Google Cloud project. It enables real-time event streaming pipelines that can feed downstream consumers, analytics systems, or microservices.
- Continuous delivery: Streams data updates from Flow collections to Pub/Sub topics in real time
- Authentication options: Supports OAuth (via the Flow web app) or Service Account credentials for manual setup
- Automatic topic handling: Can create topics and default subscriptions automatically for ease of use
- Multiplex publishing: Materialize multiple collections into a single Pub/Sub topic with unique identifiers
- Guaranteed ordering: Publishes messages with ordering keys derived from Flow collection keys to maintain sequence integrity
- Flexible integration: Compatible with all GCP regions and existing Pub/Sub infrastructure
💡 Tip: Use this connector to stream Flow data into event-driven applications, trigger workflows in Cloud Functions, or power analytics pipelines through Pub/Sub subscriptions.
How to integrate Azure Cosmos DB with Google PubSub in 3 simple steps using Estuary Flow
Connect Azure Cosmos DB as Your Real-Time Data Source
Set up a real-time source connector for Azure Cosmos DB in minutes. Estuary captures change data (CDC), events, or snapshots — no custom pipelines, agents or manual configs needed.
Configure Google PubSub as Your Target
Choose Google PubSub as your target system. Estuary intelligently maps schemas, supports both batch and streaming loads, and adapts to schema changes automatically.
Deploy and Monitor Your End-to-End Data Pipeline
Launch your pipeline and monitor it from a single UI. Estuary Flow guarantees exactly-once delivery, handles backfills and replays, and scales with your data — without engineering overhead.
Estuary Flow in action
See how to build end-to-end pipelines using no-code connectors in minutes. Estuary Flow does the rest.
Why Estuary Flow is the best choice for data integration
Estuary Flow combines the most real-time, streaming change data capture (CDC), and batch connectors together into a unified modern data pipeline:

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Frequently Asked Questions
- Set Up Capture: In Estuary Flow, go to Sources, click + NEW CAPTURE, and select the Azure Cosmos DB connector.
- Enter Details: Add your Azure Cosmos DB connection details and click SAVE AND PUBLISH.
- Materialize Data: Go to Destinations, choose your target system, link the Azure Cosmos DB capture, and publish.
What is Azure Cosmos DB?
How do I Transfer Data from Azure Cosmos DB?
What are the pricing options for Estuary Flow?
Estuary offers competitive and transparent pricing, with a free tier that includes 2 connector instances and up to 10 GB of data transfer per month. Explore our pricing options to see which plan fits your data integration needs.
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