Real-time
Two-way sync
Changes in CockroachDB or MongoDB instantly reflect in both systems. No stale data, no manual imports.
Database
CockroachDB to MongoDB integration — real-time, two-way sync
Keep CockroachDB and MongoDB 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
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Migrated from Celigo
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Migrated from Matillion
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect CockroachDB and MongoDB
Keep CockroachDB and MongoDB 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 CockroachDB and MongoDB 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
- 01 Use changefeeds to propagate row changes from a multi-region cluster into a warehouse or search index.
- 02 Keep reference data consistent between CockroachDB and regional application databases.
- 03 Capture change stream events and propagate them to SaaS tools in near real time instead of running batch exports.
- 04 Keep a MongoDB-backed product catalog aligned with an ERP's item master in both directions.
Common sync patterns
Cross-engine sync
Keep the same dataset live in both CockroachDB and MongoDB, 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 CockroachDB and MongoDB
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.
| CockroachDB objects | MongoDB objects | How this pairing syncs | |
|---|---|---|---|
| Databases Logical containers a sync connects to, addressed like PostgreSQL databases. | Databases Logical groupings of collections that scope a sync connection. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Views Read-only projections used as curated sync sources. | Views Read-only aggregation-defined sources for filtered sync datasets. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Indexes Secondary indexes that keep sync lookup queries fast on key columns. | Indexes Keep lookups by sync key fast on large collections. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Sequences ID generators that matter when writes originate from an external system. | Collections The table-like sync unit; each collection maps to a table or object in the paired system. | Sequences is specific to CockroachDB and Collections to MongoDB — each maps to any object or custom field on the other side. | |
| Changefeeds Built-in CDC streams that emit row-level changes to external sinks. | Documents BSON records created, updated, and deleted during syncs, keyed by _id. | Changefeeds is specific to CockroachDB and Documents to MongoDB — each maps to any object or custom field on the other side. | |
| Schemas Namespaces within a database used to isolate synced tables from application tables. | Embedded documents and arrays Nested structures that syncs flatten or map to related records in relational targets. | Schemas is specific to CockroachDB and Embedded documents and arrays to MongoDB — each maps to any object or custom field on the other side. |
How changes propagate between CockroachDB and MongoDB
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
CockroachDB MongoDB Sub-second propagation
DetectionChanges in CockroachDB are captured at the source via change data capture — no polling loop against its API. CDC via changefeeds, which stream row-level changes.
DeliveryEach detected change is applied to MongoDB as a row-level write, with types converted between the two schemas.
MongoDB CockroachDB Sub-second propagation
DetectionChanges in MongoDB are captured at the source via change data capture — no polling loop against its API. MongoDB oplog and change streams (requires the database to run as a replica set — even single-node).
DeliveryEach detected change is applied to CockroachDB as a row-level write, with types converted between the two schemas.
Rate-limit considerations
- CockroachDB: No API rate limits in the SaaS sense; throughput is bounded by cluster capacity.
What ships with CockroachDB ⇄ MongoDB
Connect CockroachDB and MongoDB for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every CockroachDB–MongoDB connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever CockroachDB or MongoDB 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 CockroachDB or MongoDB record.
Observability
Monitoring
Track your CockroachDB ⇄ MongoDB sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between CockroachDB and MongoDB.
How the CockroachDB and MongoDB connectors work
CockroachDB
- Integration surface
- SQL wire protocol (PostgreSQL-compatible)
- Authentication
- Database credentials with TLS; client certificates or SCRAM password auth
- Change detection
- CDC via changefeeds, which stream row-level changes; polling as a fallback
- Capabilities
- read · write · CDC
- Rate limits
- No API rate limits in the SaaS sense; throughput is bounded by cluster capacity
MongoDB
- Integration surface
- MongoDB wire protocol via official drivers; Atlas additionally offers an administration REST API for cluster management
- Authentication
- Database credentials (username/password) or TLS/SSL X.509 certificate (.pem upload), entered individually or via a MongoDB connection string (SRV or standard); Stacksync IP allowlisting required
- Change detection
- MongoDB oplog and change streams (requires the database to run as a replica set — even single-node); Stacksync leverages these built-in tools to track changes in real time
- Capabilities
- read · write · CDC
How it works
How to connect CockroachDB to MongoDB — 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 CockroachDB and MongoDB with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
CockroachDB
connected
MongoDB
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the CockroachDB and MongoDB 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 · CockroachDB ⇄ MongoDBCustomers 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.
CockroachDB MongoDBCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
CockroachDB and MongoDB integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between CockroachDB and MongoDB: authenticate both systems, choose the objects to sync (such as CockroachDB's Databases and Views), map fields visually, and changes propagate both ways in milliseconds — no code required.
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CockroachDB: SQL wire protocol (PostgreSQL-compatible). Authentication: Database credentials with TLS; client certificates or SCRAM password auth. MongoDB: MongoDB wire protocol via official drivers; Atlas additionally offers an administration REST API for cluster management. Authentication: Database credentials (username/password) or TLS/SSL X.509 certificate (.pem upload), entered individually or via a MongoDB connection string (SRV or standard); Stacksync IP allowlisting required. Stacksync manages authentication, retries, and rate limits on both sides.
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CockroachDB: CockroachDB speaks the PostgreSQL wire protocol, so standard Postgres drivers and tooling connect without modification. MongoDB: Only ObjectId primary keys are supported for collections. Stacksync's field mapping accounts for these differences between CockroachDB and MongoDB 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 CockroachDB and MongoDB 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 CockroachDB and MongoDB connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom CockroachDB–MongoDB integration in-house.
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Yes — Stacksync ships production-grade connectors for both CockroachDB and MongoDB. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
SECURITY
Security teams trust 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
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 477 integrations available for CockroachDB and MongoDB.
Popular · 5 of 477
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CockroachDB ⇄ InfluxDB -
MongoDB ⇄ Azure Cosmos DB -
MongoDB ⇄ Azure SQL Database -
MongoDB ⇄ Citus -
MongoDB ⇄ Couchbase
No integrations match .
