Real-time
Two-way sync
Changes in Azure Cosmos DB or Firebase instantly reflect in both systems. No stale data, no manual imports.
Database
Azure Cosmos DB to Firebase integration — real-time, two-way sync
Keep Azure Cosmos DB and Firebase in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
Case study
Migrated from Mulesoft
Case study
Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
Case study
Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Azure Cosmos DB and Firebase
Keep Azure Cosmos DB and Firebase synchronized in real time, across engines, regions, or services, in one or both directions.
Two databases that must agree is one of the oldest problems in engineering: different engines for different workloads, separate services with overlapping reference data, a migration in flight, or regional instances that share a subset of records. Hand-rolled replication across systems means change capture, conflict handling, and type mapping, all built and maintained by your team.
Stacksync syncs tables or collections between Azure Cosmos DB and Firebase continuously and bi-directionally, translating types between the two engines and resolving conflicts by rules you configure. Rows written on either side appear on the other within seconds.
Common use cases
- Sync CRM or ERP records into a Cosmos DB container that backs a customer-facing application.
- Mirror Cosmos DB items into Postgres so teams can query operational data with standard SQL.
- Sync Firestore user and account documents into a CRM so go-to-market teams see live product data.
- Mirror Firestore collections into Postgres or a warehouse to run SQL analytics on app data.
Cross-engine sync
Keep the same dataset live in both Azure Cosmos DB and Firebase, so each workload runs on the engine that suits it.
Migration with zero-downtime cutover
When one database is replacing the other, sync both directions during the transition and switch traffic when ready, without a freeze window.
Shared reference data between services
Services that own separate databases stay consistent on the records they share, without a custom replication layer.
What you can sync between Azure Cosmos DB and Firebase
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Azure Cosmos DB objects | Firebase objects | |
|---|---|---|
| Change feed entries Ordered record of inserts and updates per partition, consumed for incremental sync. | Authentication Users User accounts read into CRMs and warehouses for customer records. | |
| Stored procedures and triggers Server-side logic scoped to a partition; relevant when writes must respect existing validation. | Cloud Storage Objects Files referenced from documents; usually synced as metadata plus URLs. | |
| Databases Top-level namespaces that scope containers and throughput provisioning. | Cloud Functions Triggers Server-side hooks that fire on document changes and can push updates outward. | |
| Containers The unit of partitioning and throughput; each container maps to a synced collection. | Firestore Collections Top-level groupings of documents that a sync maps to tables or SaaS objects. | |
| Items (JSON documents) Schema-flexible JSON records read and written during sync; nested structures are flattened or mapped as needed. | Firestore Documents Schemaless JSON-like records, the primary unit synced to and from external systems. | |
| Partition keys Determine data distribution and must be included on writes for the sync to route items correctly. | Subcollections Nested collections under documents, typically flattened into related tables during sync. |
What ships with Azure Cosmos DB ⇄ Firebase
Connect Azure Cosmos DB and Firebase for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Azure Cosmos DB–Firebase connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Azure Cosmos DB or Firebase data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Azure Cosmos DB or Firebase record.
Observability
Monitoring
Track your Azure Cosmos DB ⇄ Firebase sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Azure Cosmos DB and Firebase.
How the Azure Cosmos DB and Firebase connectors work
Azure Cosmos DB
- Integration surface
- REST API and SDKs over HTTPS (API for NoSQL, formerly the SQL API); also MongoDB, Cassandra, Gremlin, and Table API surfaces
- Authentication
- Account keys, resource tokens, or Microsoft Entra ID role-based access
- Change detection
- Built-in change feed exposing inserts and updates in order within each partition key range
- Capabilities
- read · write · CDC
Firebase
- Integration surface
- REST and gRPC APIs, typically accessed through the Firebase Admin SDK
- Authentication
- Google service account credentials (IAM) for server-side access; Firebase Auth tokens for client contexts
- Change detection
- Real-time snapshot listeners on Firestore queries and Cloud Functions triggers on document changes
- Capabilities
- read · write
- Rate limits
- Subject to Firestore's documented operation quotas and per-document write throughput limits
How it works
How to connect Azure Cosmos DB to Firebase — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Azure Cosmos DB and Firebase with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Azure Cosmos DB
connected
Firebase
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Azure Cosmos DB and Firebase objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Azure Cosmos DB ⇄ FirebaseCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Azure Cosmos DB FirebaseCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Azure Cosmos DB and Firebase integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Azure Cosmos DB and Firebase: authenticate both systems, choose the objects to sync (such as Azure Cosmos DB's Change feed entries and Stored procedures and triggers), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Azure Cosmos DB: The change feed is a first-class feature: it records inserts and updates (and, in newer modes, deletes) so incremental sync does not require scanning containers. Firebase: Firebase spans two databases with different models: Firestore (collections and documents) and the original Realtime Database (a single JSON tree). Stacksync's field mapping accounts for these differences between Azure Cosmos DB and Firebase without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Azure Cosmos DB and Firebase records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Azure Cosmos DB and Firebase connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Azure Cosmos DB–Firebase integration in-house.
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Yes — Stacksync ships production-grade connectors for both Azure Cosmos DB and Firebase. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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Change detection on Azure Cosmos DB: Built-in change feed exposing inserts and updates in order within each partition key range. On Firebase: Real-time snapshot listeners on Firestore queries and Cloud Functions triggers on document changes. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
SECURITY
Security teams love Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 type II
ISO 27001
HIPAA BAA
GDPR
CCPA
CSA STAR
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Azure Cosmos DB and Firebase.
Popular · 8 of 386
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Azure Cosmos DB ⇄ Apache Cassandra -
Azure Cosmos DB ⇄ Azure SQL Database -
Azure Cosmos DB ⇄ Citus -
Azure Cosmos DB ⇄ Couchbase -
Firebase ⇄ MariaDB -
Firebase ⇄ SQL Server -
Firebase ⇄ Postgres Heroku -
Firebase ⇄ Airtable
No integrations match .
